Replace second occurrence string java. String: How to replace multiple possible .

Replace second occurrence string java Note that a similar method String. remove parts of string. I need to replace the first 'string' to 'anotherString' after the first 'here', so the output will be: this is a string test with a lot of string words here another anotherString string there string here string. 2k 38 38 gold badges 176 176 silver badges 278 278 bronze badges. For n=2, the command is: Trying to figure out what's the best way to insert a line break after the second comma in a string. chars() I just realized his second example shows that it does remove duplicates even if they don't follow one another. Your command would only work if the string line appeared more than once on one or more lines. Mark Francois (Rayleigh) (Con): If the scheme was so poorly targeted, why were the Government about to roll it out to employees in the Department of Trade and Industry and the Department for Work and Pensions on the very day References. *)title1", "title2"); However, if there are more than 2 instances, it may not be what you want. To replace the nth occurrence string In Java, the String. I did a function that you can use easily :) A demo here to understand the regex Replace fourth occurrence of a character in a string. 0, 11. Removing the last character from a string. // Using example filePath from question String filePath = "/mnt/sdcard/OG Ron C, Chopstars & Drake - Choppin Ain't The Same-2013-MIXFIEND/02 Drake - Connect (Feat. 11. Ask Question Asked 10 years, 6 months ago. 2 , but it makes 1. replaceAll() searches and replaces all substrings using regular expressions. private Matcher matcher = Pattern. replacement: replacement sequence of characters. 0 etc. If you want to find the occurrence to replace it, use one of the overloads of Regex. appendReplacement will do two things:. replace() API searches for a literal substring and replaces each occurrence with the replacement string. It iterates over each character of the input string and builds up a set of characters seen so far, building up an output StringBuilder with the current character or its replacement if the current character has been seen already. Maven) If you want to replace a simple string and you don't need the abilities of regular expressions, you can just use replace, not replaceAll. But now the last boundary is used. Just run your script twice - once to replace the first occurrence with ${A}, once to replace the (now first) occurence with ${B}. String. those. Something like this (not tested) String text = "A&B&C"; String delim = "&"; String[] elements = text. It's a little crude, but you can do this to handle any number of occurrences: Get the IndexOf We'll look at a practical Java solution for this in this post. Monday 02 January 2017 I have created one regex which gives me the last two character of second word in a string, but am not sure how to replace them with nothing. But this works perfectly for the example. 1. So this is what I tried String s = "1. replace() The second signature replaces every occurrence of the target substring (represented as a CharSequence) with the replacement substring. How to remove first and last character in a string in Java? Hot Network Questions Is it possible to do multiple substitions in Visual select mode? I don't think you need anything particular from Java 8 here. . The final outpu To find the second last index, first call input. To replace just one occurence: sed '0,/RE/s//to_that/' file (shamelessly stolen from How to use sed to replace only the first occurrence in a file?) java; string; replace; or ask your own question. These characters are: L => will be replaced with the lecture name; N => will be replaced with a name; D => will be replaced with a date; Example input: L_N_L_D Desired result (note that only the first L is replaced):. input: "HELLO WORLD" output: "HExxxO WORxxxD" I want to replace the last ". toUpperCase(); System. I always find examples helpful to understand the differences. Whether you are a beginner starting Java programming or an experienced looking to brush up on your Java skills, this tutorial will provide you with a deep understanding of the replace function and its uses in Java. sed command to replace second occurrence not working to me. Replace(input, @"(?<=title1. I want to set a pattern which will find a capture group limited by the first occurrence of the “boundary”. to find the most occurrence string which you don't know or you want (2) to replace the occurrence string that you know? Try googling 'pattern match string in paragraph regex java' or I want to remove a pattern with sed, only at second occurence. What i want is to change 1. Replace the last occurrence of a Substring in a String in Java. Math_Ex01_L_2018-10-05 substring() method returns a new String that contains a subsequence of characters currently contained in this sequence. To know more about more String Methods refer to the article Java String Methods. Any suggestions? I tried other links but could not get a working solution. oldChar: old character. Then just replace whatever index you want with the new desired value. target: target sequence of characters. For example: §ah§ae§al§al§bo §bw§bo§br§bl§bd should become §ahell§bo world. replaceEach as follows:. The replaceAll() function is a very useful, versatile, and powerful I have a string in which I want every occurrence of §a except the first one to be removed and the same goes for §b and §c. quote method which escapes all the regex meta-characters. Replacing a character in a string when it is single. substring to get the pieces of the big string before and after the match, and finally concat to put those before and after pieces back together, with your intended replacement in the middle. substring() method allows us to extract a substring from the input String by providing a beginIndex (inclusive) and optionally an endIndex (exclusive). The code is as follows: String addresses = "a, If we want to mimic the Java behaviour (i. Share. replace() Method The replace() method is an I have a string which contains characters that should be replaced once (at first appearance). replace("a", "e"); Is there any loop or method I can use to accomplish this? Thank you all. There are two types of replace () methods in Java String class. replace is the most terse. 1. 5. s/([^:]*):(. Example 1. That's the complete opposite of what Pattern. indexof(smallString) to get the index of the first occurrence of the small string in the big one (or -1 if none, in which case you're done). check for a values in string and take in pos of the a. Same applies for your replaceAll("remove") attempt. You can always replace it with a word you are sure will appear nowhere else in the string, and then do the second replace later: String What I want to do is take a string such as "this. Django templates: Get current URL in another language. This method has various use cases, from The String replace() method returns a new string after replacing all the old characters/CharSequence with a given character/CharSequence. ans = ans + ch; s = s. find(sub) # If find is not -1 we have found at least one match for the substring i = find != -1 # loop util we find the nth or we find no match while find != -1 and i != n: # find + 1 means we start searching from after the last Find the Second Occurrence Of Character in String Java using indexOf() Now to find the second occurrence of a character in string Java we can use both of these indexOf() methods so that it fetches the second occurrence. Replace all occurrences of the character x with o. You may use Matcher#appendReplacement and Matcher#appendTail. The first occurrence of the $? has to replaced with "there" and second occurrence of the $? has to replaced with "world". Need to Replace every second instance of delimiter "/" with ":". The length of the new String is a function of the charset, and hence may not be equal to the length of the byte array. 12 or 2. String elephant = "elaphant"; I tried using String. index 0. final String result = str. String function to replace nth occurrence of a character in a string JavaScript - We are required to write a function removeStr() that lives on String. Removing duplicate characters in a String (user inputted keyword) 3. lastIndexOf('_'); str = str. String str = "Addressline1,Addressline2,City,State,Country,";. I'm currently building a config file that will replace a given string with multiple variables, I'm having a hard time explaining it so perhaps it would be best to show you what I mean: The following method to find occurrences, appending a replacement for each occurrence into a StringBuffer. Calling replace with that string as the argument will perform the replacement throughout the entire string, so it would replace both occurrences. to the end of the string would return "that". All forum topics; Previous Topic; Next Topic; 1 Solution Accepted Solutions Clever_Anjos. charAt(bowlNumber. thus far, You can use IndexOf specifying the start index to find index of second question mark and then use Substring:. A simple solution leverages Apache's StringUtils. You replace using regular expressions with String#replaceAll. The substring begins at the specified start and extends to the character at index end - 1. Following code snippet replace all but one repeated characters System. Your substring is between the first position (the second "4") and the third position. I want to replace all the occurance of ". replaceAll(), String. One regex to replace j(++|--) with the original value for j:. I want to replace a character in this string, with another string. Finally, pass the output back through tr to recreate the newlines. '. This method always replaces malformed-input and unmappable-character sequences with this charset's default replacement string. 1, 8. Java - counting letter occurrence in a string using IndexOf. Here's what I'm currently using and it works, but I would like to know if a regex would be better for this. Thank you all for the help! String test = "This is my learning of java language and this is interesting"; I want to pick first word of this string and remove all its occurences and result should be . I am aware of replacing the first occurrence of the string. I have to do this without using the replace() method. How do I create a Java string from the contents of a file? You can use regex for this. Like this: String replace in java is done by methods: * replace() - it's using a normal replace * replaceAll() - it's using regular expression The difference is not that the second one replace all and the first replace only 1 occurrence . 0 I want to split the Say I have a string, and I want to change the second "a" in that string to an "e". Hot Network Questions When learning about algebra and geometry, should I read roughly or try to understand every sentence? Test-case when a character doesn’t exist in the given string:-Enter a String: I love Coding. Here's the code: This one can be replace with a string instead of a character. The first pattern (. How can I attach a second subpanel to this main? Do you lose the right of attribution if I need to write a method called remove() that takes two arguments, a String and a char, and returns a new String that removes all occurrences of the char from the input String. String test = "is my learning of java language and is interesting"; So i could know that "This" word is removed and it appeared 2 times in given string. The search for substring starts from the beginning of the string i. The replace-pattern is the following: _(. Then, use bigString. Likewise, from the 2nd occurrence of . static String replaceSecondLast(String input, String search, String replacement) { In order to be able to process I'd like to replace the first occurrence of a : in a string (which is my marker, that a speech begins). Explanation: /dog/ { # find the first occurrence that match the pattern (dog) n # print pattern space and read the next line :a # 'a' label to jump to /dog/! { # if pattern space not contains the searched pattern (second occurrence) N # read next line and add it to pattern space ba # jump back to 'a' label, to repeat this conditional check } # after find the second occurrence The problem you have is that to replace all occurrences, you have to use the g regex flag. replace replaces each matching substring but does not interpret its argument as a regular expression. I think it is the best, because it uses the Java methods as intended rather than trying to reinvent the wheel. One of the most efficient ways to replace matching strings (without regular expressions) is to use the Aho-Corasick algorithm with a performant Trie (pronounced "try"), fast hashing algorithm, and efficient collections implementation. Replace character in a string. replace(char1, char2), it replaces all the occurrences of the character in the string. This can be manipulated if we break input string separated by "/" and construct output string based on that but need to find the simplest way to do this. section The second replace() method is added since JDK 1. String Others have already stated the correct method of: Escaping the + as \\+; Using the Pattern. Follow edited May 2, 2013 at 13:00. replace() at a specific index of the search Given a string: string = &quot;Test abc test test abc test test test abc test test abc&quot;; This seems to only remove the first occurrence of abc in the string above: string = string. String inp = "Monday 02nd January 2017"; I want to replace last two characters from second word. replace("&", "&amp;"); Despite the name as compared to replaceAll, replace does do a replaceAll, it just doesn't use a regular expression, which seems to be in order here (both from a performance and a good practice perspective - don't use regular expressions by accident as they have special character requirements which you won't be How to split the string before the 2nd occurrence of a character in Java. I need to replace the occurrence of ',' at the end of the string with '. It essentially reads the string backwards and uses the String object's replaceFirst method, this is exactly what I was looking for. *)/\1_\2/ You will need differing escaping depending on the language/regex-engine you use. The positive lookahead ensures that it only splits when it does not see another occurrence later in the string. Below is the implementation of the above approach. You have to pass the actual character/substring. ") produces an empty string, because the dot means "anything" If you want to replace only the point should be indicated as a parameter "\\. 34. replace() (that Algorithm. 3. The documentation for Pattern In Java, the String. So basically replace <?xml version="1. 7. substring(0,pos) + otherchar + str. would return "this. Modified 3 years, Another is to replace the original string with a regexp and after do the split: I just added a second solution that does not use string. But you’re not using regex, you’re just selecting a string, so you don’t have access to that. replaceAll(". 0" encoding="UTF-8"?> string which appears after the <books> opening tag with a space. The second replace () Method 1: Using String. 2. Parameters. Finding second occurrence of a substring in a string in Java. Then just rebuild the string with the underscore in place. 1049. 190" The str can be something like this as well: 1. <b>$1</b> says replace the matched string with this. replace(ch,' '); //Replacing all occurrence of the current character by a space } System. substring(pos+1) Constructs a new String by decoding the specified array of bytes using the specified charset. but don't Get the index of the first occurrence by calling indexOf(substring) and save the result in a variable, let’s say firstIdx; Get the index of the second occurrence by calling indexOf(substring, firstIdx + substring. Add a comment | Multiple replace option for a string in java regex. i have problem writing java code to remove repeated letters from word. remove the " so you are using the VALUE of the String named remove, not the fixed string "remove" Example: I'm looking for the starting position of nth occurrence, in this case the second. Matches(), which returns a MatchCollection, and check the index of the item: index % 2 != 0). Improve this question. You can use the split method on your String to break it into its tokens with a given delimiter. We may use the lastIndexOf() method to determine the location of the last occurrence of a substring in a Java string, and then we can use the substring() method to build a new string with the replacement. Where the $1 refers to the content matched in the brackets () A very noob question. You can replace all occurrence of a single character, or a substring of a given String in Java using the replaceAll() method of java. This guide will cover the method's usage, In Java, String. ^) using tr. Reading ascii file line by line - Java. replace(), but that replaces all the a's in the string, returning "elephent". match character based on previous character. E. lastIndexOf("+") - 1 )); beginning index will be the index of occurrence index before last occurrence index. and the x is to increased every occurrence of L. Notice that all characters that are not enclosed by ()'s need to be re-written I want to skip first occurrence if no of occurrence more than 4. String str = "Know Program"; char ch = 'o'; System. Next, let’s combine these to standard methods to solve the problem: The second argument of "indexOf" asks for a start point. Probably a while. This method also allows you to specify the target substring using the regular expression, which means you can use this to remove all white space from String. Also, the String. indexOf(ch, str. If you want to go the regex route with String#replaceAll(), then you can consider using the following pattern:. R regex - First replace all the newlines with a unique character that does not occur anywhere else in your file (e. Many of the regex meta characters (. Maybe you should post that as a different question, now that you've solved the matter of finding the last For example i have a string "13 + 12 + 25 + 55 + 65" I want to find the index of occurrence before the last occurrence of + sign. Suppose, if input is "SUSHIL" then How can I de-duplicate repeated characters in a Java string? 0. regex replace every 2nd occurrence with Javascript. You just need to avoid one of the most famous performance killers in all of Java - repeated string concatenation. replace("very", "not very", 1) The third parameter is the maximum number of occurrences that you want to replace. For example if you want to replace the second occurrence of "_" with "A", then: String theLetters = "_ _ _ _ _\n"; String replacedText = replaceOccurrence(theLetters, "_", "A", 2); Result: _ A _ _ _ To replace the nth Occurrence String we have developed 2 methods in the above example:- replaceNthOccurance () and indexOfNthOccurrence (). ; Another method that you can use is to put the + in a character class. csv: public String aTo123X(String str) { /* Strategy: get string length of the code, and create a for loop in order to find each individual part of the String chars. I am having a string with the format as abc_1234_01233456_DC . Before Java 9. get characters from string by index in java. replace() method is a simple yet powerful tool for transforming text by replacing characters or substrings within a string. For example, I have an address string like . distinguish between pre- and postincrement), we need three different regular expressions since we have to replace j with three different values:. Finding the index of occurrence before the last occurrence of a string. text <- c("Mr. IndexOf('?') + 1 Find the second "4" using String indexOf. You can now build the result using input. 4. Observe the below code. var pos = str. split at all. replace( I want to replace first occurrence of String in the following. String test = &quot;see Comments, this is for some test, help us&quot; **If test contains the input as follows it should not replace You can use a while loop with str. NullPointerException: if the replacement or target is equal to null. " We cannot predict the value of the "123" part and the "def" part. substring(int beginIndex, int endIndex) and input. j(?:[+]{2}|[-]{2}) Regex101 demo One regex to replace ++j with the value j + 1: [+]{2}j Regex101 demo. From the documentation for Python: string. 1 to 2. 190 or 1. lastIndexOf(String str), then call input. s1 = "2999. See the below code in action here. r/java • My final take on Gradle (vs. indexOf() method finds the first occurrence index of a String in another String. Follow edited May 23, 2017 at 11:52. Commented Apr 14, 2023 at 11:53. Auxiliary space: O(n), where n is the length of the input string. Here Due to my poor Java knowledge I am unable to manage 3 and 4. How do I find the second index of a character in a string. A simpler solution is to use StringBuilder objects to search and replace text. You can use a positive lookahead in your regex to ensure it only splits on the last occurrence. {obj. It has two forms. 1, 11. How to replace all but 2 consecutive repeat . 2. By calling indexOf twice, you find the first instance of the string than check for another instance skipping past the first instance (+4 since indexOf will return the start of the string, adding the length of How to Remove string after second last occurrence of special character? 0. It could be done like this: Since you don't want to replace the first slash, you need $1/$2 at the beginning of your replace string. Replace only the first specific occurrence. retainFrom(input); But if you want to turn accented characters into something sensible that's still ascii, look at these questions: Converting Java String to ASCII; Java change áéőűú to aeouu; ń ǹ ň ñ ṅ ņ ṇ ṋ ṉ ̈ ɲ ƞ ᶇ ɳ ȵ --> n or Remove diacritical marks from unicode chars Just match two groups - the first being everything before the first colon; the second, everything after it. 4"; System. those". Your problem is that you are using the String#replace() method against the entire string rather than just the found word itself: I'm using centos 7. replace(". 236 I'd like to use a regex pattern to do a replace in an editor like Notepad++, I came up with this regex to match my expression: \d{1,2}:\d{1,2}:\d{1,3} Hello! I need to replace the second coma in a string, but only the second one and not the others. What is the most efficient way to achieve this? java; replacing a character every occurrence in a string in java. I have a large String in which I have & characters used available in following patterns - A&B A & B A& B A &B A&amp;B A &amp; B A&amp; B A &amp;B I want to replace all the occurrences of & character to &amp; While replacing this, I also need to make sure that I do not mistakenly convert an &amp; to &amp;amp;. community wiki 4 revs, 2 users 81% Petter Friberg. , *, + among many others) are treated literally in the character class. In my scenario I want to replace the last bit of a string after a period, or the last word and everything after. For now I will get max of 5 number underscore occurrence. Obviously, you also can pipe the output of a previous command through that. In both C# and java a string is a sequence of UTF-16 code units. substring(int beginIndex). Replace nth occurence of a character by another. ". The charAt method in Java is a fundamental Both replace() and replaceAll() replace all occurrences in the String. Get index of 3rd comma. replaceAll("([a-zA-Z])\\1{2,}", "$1")); Help is required to find out A. – Jon Skeet. Would 1/4 inch coating of tungsten burn off while re-entering atmosphere at 36,000ft/second? String manipulation, removing characters until the second occurrence in java script Hot Network Questions Convincing the contrapositive is equivalent No need for jQuery nor regex assuming the character you want to replace exists in the string . The pattern [a-zA-Z] will match all lowercase English letters (a-z) and all uppercase ones (A-Z). Problem is: I have a string: "ha bla ha ha" Now I want to replace the first (and only the first) "ha" with "gurp": "gurp bla ha ha" string. The function should remove the nth appearance of char from str. So you can also do: The String. How to replace first occurrence of string in Java. println(str. 1; bowlNumber. 3. e 1 to 2. – Adam Halasz. One Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In terms of code size clearly the String. println("uppercase "+uppercase); String replace = uppercase. replace('ab I have a string like below. Problem is I can not replace all but two repeated consecutive characters. If it exists then display the index. This article explores how we can employ these methods to replace Given three strings S, S1, and S2 consisting of N, M, and K characters respectively, the task is to modify the string S by replacing all the substrings S1 with the string Since JDK 1. 05:23:236 I'm trying to replace the second occurrence of the colon with a dot: 05:23. First, you need a loop of some kind. but don't know how to replace the last occurrence of a string I have a string with this format abc-123-def and I want to replace the first "-" with "_" and the second "-" with ". bar". How to remove nth character from the string? 7. private String testStringUtils( Finding second occurrence of a substring in a string in Java. quote() does, and what the OP was asking for (quote() says, "treat the string as a literal"). returns "1001" string. finditer()` method to find all occurrences of the specified substring (`'Python'`) in a given main string. The String. prototype object and takes in a string str, a character char and a number n. I currently have a program that works on an array by using a for loop to iterate through the array with an embedded if statement that matches the element in the array to the one I'm looking for. Ask Question Asked 6 years, 10 months ago. replace(), and String. Actually, you are asking a whole different question now. String result = animals. My code to replace the character is Time Complexity: O(N*M) Auxiliary Space: O(N) Efficient Approach: The above approach can also be optimized by creating the longest proper prefix and suffix array for the string S1 and then perform the KMP Algorithm to find the occurrences of the string S1 in the string S. Example: Return a new The String. I'm trying with some methods but I've failed. This method returns a new string resulting from replacing all occurrences of old characters in the string with new characters. Modified 6 years, 10 months ago. Hello! I need to replace the second coma in a string, but only the second one and not the others. How replace first occurrence of string after another string. substring(0,str. *?)_ with the flag g at the end - so it will replace until all occurances are satisfied. The substrings Reordering a string using patterns Can we obtain the power set of a finite set without the Axiom of Power Set? Correctly sum pixel values into bins of angle relative to center - N will pull the next (second) line into the pattern space and - `s/4s/3s/2' will then replace the second occurrence of "4s" in the pattern space with "3s". substring(0,1). Hot Network Questions Cisco control and management plane interfaces this is a string test with a lot of string words here another string string there string here string. So, from the start of the string to the 2nd occurrence of . After that the two lines are written to the standard output and a new cycle of sed begins. lastIndexOf(String str, int fromIndex), passing in the value from the first call. Java String get multiple index values. The logic of the code goes as follows:- We will iterate through the loop until the length of the string becomes 0. Regex. Simple rebuild the string using the first and second capture groups, with and in between them. Replace(String, String, MatchEvaluator). 5. The original question was about detecting the last occurrence of one String in another String. replaceFirst() are all valuable methods for replacing characters within a string. I tried the following solutions: Sed replace at second occurrence; Sed/Awk to delete second occurence of string - platform independent; sed: How to delete second match in a file Java Replace nth Occurrence of String; Replace String With Escape Character; Conversion of/to String Programs in Java. The simple Java implementation is slightly smaller and cleaner (IMHO) than the Lambda (don't get me wrong - I use Lambdas often where they are appropriate) Execution speed was, in order of fastest to slowest: simple Java implementation, Lambda and then String. newChar: new character. 76. split(delim); elements[0]= "D"; String result = ""; for (String token : elements) { result += token + delim; } System. contact_id. It also searches backwards from the specified index 1, so it will only look at everything before and including the character at index 1. but the problem is as my first character is also 1 , it also changes that to 2. How to implement the same using Java? or Is there any methods available in Apache commons StringUtils to implement the same? I have some data in the following format: MM:ss:mmm where MM is minutes, ss is seconds and mmm is 3 digit milliseconds, like:. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; I have a string which looks something like this(the most basic form): String str = "1. RegExp : How to replace the second occurrence using object? 0. Here it is 10. group() and the call àppendReplacement` with different second parameters based on what is returned. out. 1" with "_1" and ". Find Second Occurrence of Character in String Java:- Write string programs in Java to find the second occurrence of a given character in the given string. length-2)+otherchar. String: How to replace multiple possible Use bigString. String. str = str. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I did some code cleaning but the most important steps were to use a list of dynamic size instead of a fixed size array and a while-loop with dynamic termination instead of a for-loop. Replace every second occurency of a substring, Java. *) will greedily consume everything until the last comma, exactly the behavior you want. hisher_member_id} class should be java. @PavloZvarych: Pattern. Replace last numbers from a string. So far I have: public class Remover { public static void main (String[] args) { String sampleString = "this is some text"; char sampleChar = As you may already know the String#replace() method will replace all occurrences of a substring within a string whether it's inside a word or the word itself so you don't want to play that card in this particular case. public class Program { public static void main(String[] args) { String animals = "cat cat dog"; // Replace all CharSequences (strings) with another. The Stringclass is immutable, so, it returns a new String. var index = input. O. So this solution is incorrect for what he/she is trying to accomplish. *',\\s I'd like to replace all occurrences of 2 consecutive commas (",,") by a marker in between, but I've found that I can't replace the second occurrence. split string. My output should be like below. Let’s write the code for this −const str = 'aaaaaa'; const subStr = 'a'; const num = 6; Time Complexity: O(n) Space Complexity: O(1) Find The Second Occurrence Of A Substring Using RegularExpression. the only problem is that this doesn´t work anymore once the second character has an undefined length. elephant. – Joachim Sauer. println W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Simple Code. println(s); I have a string. txt_txt" How can I do this. I have changed the String alphaAndDigits = ALNUM. Viewed 64 times 0 This is my second question here and still a beginner so please bear with me. 73. Follow the steps below to solve this problem: Create a vector, say lps[] that stores the text = text. find to find the nth occurrence if it exists and use that position to create the new string:. But since what follows the second group is another / (the 2nd one on the line), you need to replace it with the ,. In the main method, we call the count, and after that we replace the letter using replaceAll, which replaces all the characters in the String for the given parameter. Inside the while loop simply inspect the return value of m. Ask Question Asked 11 String uppercase = s. This means that it only checks t and h. length-1), 2); By this I am able to replace my last character i. ----- first occurrence ----- second occurrence These two occurrences overlap at the comma, and thus Java can only replace one of them. I have this code of a very basic hangman type game. replace(s, old, new[, maxreplace]) Return a copy of string s with all occurrences of substring old replaced by new. g. 00_GRB_1" and s2 = "my File. Javascript using . In the loop, since you're replacing the "old" string, you could just keep looping until you don't find it anymore. Shoe. String class. Replace only one specified character from string. The first is. Replace/remove second occurrence in a string . Replace nth occurrence of string. A correct line of a Java program only rarely includes two assignment operators. Groovy: replaceLast() is missing-1. I want to do this as simply as possibly without needing to import any util or use arrays. I want to replace all occurrences of single quotations with two quotations, except in first and last occurrence, I managed to get to exclude the last occurrence using regex as follows String toRep Time complexity: O(n^2), where n is the length of the input string. How do I do that in a performance indexOf("remove") means, you are searching for the (fixed) STRING remove, not for the value of the String named remove - which is most likey not, what you want to do. replace() method in Java is used to replace occurrences of a specified character or substring with another character or substring. println(data. In your file, the second occurrence is on the second line so what you need is this: sed '2s/line/LINUX/' mytextfile To edit the file in-place: sed -i '2s/line/LINUX/' mytextfile The 2s is to make the change on the second line. subString = str. Maybe you could expand on what "undesirable results" you're talking about. " in a string with empty space. Exception Throws. String bowlNumber = 1. Enter a character to be replaced: P Enter a new character to place: Q After replacing the last occurrence of ‘P’ with ‘Q’ = I love Coding. Improve this answer. More about regex and strings in java: * Java regex extract abbreviations * java Iterate over the chars of your first String; replace the first occurrence of that char in the second string with an empty String. In my case those strings will always have either one or two characters between them, resulting in the following regex: Regular expressions are quite complex to manage due to the fact that some characters are reserved: for example, "foo. The original data is '12345678'. From this "this #?anystring; is #?anystring2jk; test" To This "this is test" how could i do it in java ? How to replace multiple occurences of a character in a java string using replace and charAt methods. Javascript Regular Expression to replace only multiple occurrences with that substitute. I want to replace to 'xxxx5678'. Commented Jan 23, 2013 at 13:02. Find the third "4". e. Related. As requested in a comment, I'll try to explain the regex: (/[^/]*){2}/([^/]*) /[^/]* is a / followed by [^/]* (any number of characters that are not a If you're using C#, you can either get all the matches at once (i. Here is a program fragment that inspects a line for this: I want to basically replace the second occurence of the entire xml tag with blank space. : Java Regex for first matching String. How we can replace the text which is in between the second and third occurrence of &quot;_&quot; with some other text. lang. replace("ha", "gurp") doesn't work, as it replaces all "ha"s. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Replace() that uses a MatchEvaluator (e. Thanks in Advance This will only replace the second instance of title1 (and any subsequent instances) after the first: string output = Regex. length()) Next, The simple answer is: token = token. replaceAll("[a-zA-Z]","@"); If you want to replace all alphabetical characters from all locales, use the pattern \p{L}. 0. println When I used the String. Replace nth occurrence javascript. Ditto - same here! 2,480 Views 0 Likes Reply. This is somehow a duplicate of this problem Ruby - replace the first occurrence of a substring with another string just in java. Returns. 10. Examples. value. Sorry if my question is foggy, it's not that easy to explain. my inputs is String t1 = "test1:testVar('varName', 'ns2:test')"; String t2 = "test2:testVar('varName', 'ns2:test', 'defValue')"; String patternString = "\\('. replace () method. Then pass it to sed and tell it to replace the nth occurrence of your string. replace(bowlNumber. txt" with "_txt" The result of the String should be . Replace last char in a string. def nth_repl(s, sub, repl, n): find = s. indexOf(ch) + 1 I am having a string like this "Position, fix, dial" I want to replace the last double quote(") with escape double quote(\") The result of the string is to be "Position, fix, dial\" How can I do this. IndexOf('?', input. how to replace only one word in EditText. This code will remove repeated letter by accepting only one of the letter which is repeating . That's why the replace string has to be $1/$2,. Method 2: Using find() method In this approach, the idea is to use the find() function to find the Nth occurrence of the character in the given string S and replace it with another giver character. The ? in the regex says it will stop matching at the first _ afert the opening _ (non-greedy). Replace last underscore in a string. var str = "Ana has apples!"; var n = str. 1 to 1. substring(beginning index,str. This problem seems like it ought to be amenable to Java 8 Java 8 has a new String. After you are done iterating check if the second String is now empty, which will tell you if all chars from the first String where found:-- Replace Last Occurrence of a character in a string. 2 I want to remove a string that is between two characters and also the characters itself , lets say for example: i want to replace all the occurrence of the string between "#?" and ";" and remove it with the characters. For instance: String a="aa{aaaaaaa{aaa}"; I'd like to find the index value of the second {. 0. It has values like 8. 4. I have a situation where i have to replace first 4 characters of a string to 'x'. The straightforward approach to solving this problem is given in another answer. I'm trying to convert the first letter of a string to lowercase. In the string object the "$?" is the regex pattern. Expectedly, it finds nothing and returns -1. Java replace only first occurrence of a substring in a string. Commented Jul 31, 2014 at 11:59 Java replace only first occurrence of a substring in a string. When finding occurrences, it does not see yet what you replace the pattern with, and thus it doesn't see that new occurrence of ",382," is generated when replacing the first occurrence is replaced by the comma. String string = "Hi$?Hello$?". Just add your string where u want to replace string in s and in place of "he" place the sub string u want to replace and in place of "mt" place the sub string you want in your new string. use Regex. I am trying to replace the last char in my String . java replace substring in string specific index. 111. substring(1) This works, but are there any better ways to do this? I could use a replace function, but Java's replace doesn't accept an index. that" and get a substring to or from the nth occurrence of a character. In this example, the function `find_second_occurrence_regex` utilizes the `re. I'm suppose to replace a "L" in a string every time it is found in the string HELLO WORLD, with "x". "," As you want to remove the first dot and replace the second one with a space, you need replace the whole P. Here is what I want, remove a pattern but on second occurrence. How do I do that please ? For example i have aaaaa i want to replace the first 'a' with "bbbb" for(i=0; i&lt;a I have heard that JavaScript has a function called search() that can search for a string ( lets call it A ) in another string ( B ) and it will return the first position at which A was found in B. toLowerCase() + value. 5, a new replace () method is introduced that allows us to replace a sequence of char values. Regex pattern for finding string between two characters - but first occurrence of the second How to replace second occurrence of a character in string Hi , I have a table called "Technology Versions". String substring(int FirstIndex) Here, FirstIndex specifies the index at which the substring will begin. Now you are asking a question about changing the appearance of that String in a text field based on key strokes. search(" "); The code should return 3 as its the first position in which the space was found in str. compile Now you are reusing the code for other letter, you dont need to repeat your for loop anymore, just call the method. replace() Use replace() if you just want to replace some char with another char or some String with another String (actually CharSequence). it will add to selected buffer text placed between current match and previous match (or start of string for first match),; after that, it will also add replacement for current match (which can be based on it). I am full aware that strings are immutable and can't be changed and can be "editabile" - ohhh the controversy! So I am trying to get it so that without the replace() method for strings in java, to implement where a specific char in a string gets switched out with another char. compile() compiles the string as a regular expression, meaning the special characters will be given the special meaning. How to replace second occurence of char in a String? (Java) 3. What's in the file. First of all, lastIndexOf will return an index, not a string. Second Occurrence. You should just omit the second argument if you want to search the whole string. How to replace or convert the first occurrence of a dot from a string in java. replaced string. To better explain, this method replaces the string exactly how I want it: (Edit: I changed the regex based on Avinash's response, still looking for a faster alternative as the regex replaceall is still slow) If it's in the string, recurse on the the part of the string before the occurrence, and on the part of the string after the occurrence. You need to do this in order to create a single string for sed. To fix your solution, you can replace the call of replace with a composition of three substrings: from zero to last_index; s5; from last_index+4 to the end. java; string; replace; Share. indexOf to find all occurrences of a word in a String. Problems with a word guessing game. replacing a character every occurrence in a string in java. iitllp qki axqft amljp ntbjvr mwcb quuay sck hgxmjawb eggurbrc