Replace second occurrence string java Ask Question Asked 10 years, 6 months ago. Here is what I want, remove a pattern but on second occurrence. replace("ha", "gurp") doesn't work, as it replaces all "ha"s. Example. Matches(), which returns a MatchCollection, and check the index of the item: index % 2 != 0). 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). 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. 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. I want to replace first occurrence of String in the following. Java - counting letter occurrence in a string using IndexOf. csv: You replace using regular expressions with String#replaceAll. 1, 8. My Code: String value="EMPID In terms of code size clearly the String. The task is to As the name itself suggests, the replace () method is used to replace all the occurrences of a specific character of a String with a new character. e. substring(int beginIndex, int endIndex) and input. Replace character in a string. This is the code I have written which takes input and returns the matching occurence: and, actually, posted code will not compile in Java - the only language the question is tagged with, is the java tag (RegExp is not (standard) Java, neither are single quote ' used/allowed for strings) || also note the question is more than 10 years old and already has an answer [working solution]) How can i replace the second occurrence of the symbols ?? Once it hits the first symbols, it replaces it but how i can reach the symbols after it ?? function convertHTML Another option is to loop through the string rather than the dictionary, then just check each character in turn, replacing if they need replacing. 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 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 You can use a positive lookahead in your regex to ensure it only splits on the last occurrence. replace As you want to remove the first dot and replace the second one with a space, you need Inside the while loop simply inspect the return value of m. What's in the file. 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. substring(int beginIndex). replace is the most terse. group() and the call àppendReplacement` with different second parameters based on what is returned. 4. Commented Apr 14, 2023 at 11:53. String class. Exception Throws. Finding the index of occurrence before the last occurrence of a string. 00_GRB_1" and s2 = "my File. 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:. replaceAll() only accepts a pattern. target: target sequence of characters. Replace every second occurency of a substring, Java. What's the difference between java. Commented Jul 31, 2014 cut -c3- text. Modified 7 years, 6 months ago. 1. This one can be replace with a string instead of a character. replace replaces each matching substring but does not interpret its argument as a regular expression. Throws: You can replace all occurrence of a single character, or a substring of a given String in Java using the replaceAll() method of java. . Replacing a character in a string when it is single. 1" with "_1" and ". How to replace or convert the first occurrence of a dot from a string in java. replaceAll("[a-zA-Z]","@"); If you want to replace all alphabetical characters from all locales, use the pattern \p{L}. Would 1/4 inch coating of tungsten burn off while re-entering atmosphere at 36,000ft/second? Could anyone please provide the appropriate code to replace the second instance only of "?" just use IndexOf and on second occurrence, replace – Sully. Commented Jan 23, 2013 at 13:02. String substring(int FirstIndex) Here, FirstIndex specifies the index at which the substring will begin. replace() method in Java is used to replace occurrences of a specified character or substring with another character or substring. If I have two strings . 5. Is there any way to expand this code to replace the w Second of all, in order to replace multiple occurences, you should have a loop. how to replace only one word in EditText. 6. , *, + among many others) are treated literally in the character class. NullPointerException: if the replacement or target is equal to null. I have a string like below. Replace(String, String, MatchEvaluator). This guide will cover the method's usage, String replace (char oldChar, char newChar): It replaces all the occurrences of a oldChar character with newChar character. // 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. " We cannot predict the value of the "123" part and the "def" part. oldChar: old character. All forum topics; Previous Topic; Next Topic; 1 Solution Accepted Solutions Here is the function to replace the last occurrence of a string. – Joachim Sauer. txt_txt" How can I do this. You need to do this in order to create a single string for sed. str = str. First of all, it seems the explanation you provided is based on a slightly misunderstood formulation of the problem. Add a comment | Multiple replace option for a string in java regex. Then, use bigString. Replace last numbers from a string. The positive lookahead ensures that it only splits when it does not see another occurrence later in the string. but don't know how to replace the last occurrence of a string Just get the last index and do an in place replacement of the expression with what you want to replace. those. How to split the string before the 2nd occurrence of a character in Java. indexOf to find all occurrences of a word in a String. What is the most efficient way to achieve this? replacing a character every occurrence in a string 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. that" and get a substring to or from the nth occurrence of a character. 5. Now I want to remove that appended string on pressing back button. string2="dear" I want to Compare the strings and delete the first occurrence of matching substring . thus far, You can use the split method on your String to break it into its tokens with a given delimiter. R regex - replacing nth match. The substring which will replace the first match. Something like this (not tested) String text = "A&B&C"; String delim = "&"; String[] elements = text. 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. The string that I have came from a previous match. Example: Return a new String Class in Java provides 4 methods to replace String in Java. Hot Network Questions How to replace second occurrence of a character in string Hi , I have a table called "Technology Versions". lang. Need to Replace every second instance of delimiter "/" with ":". Likewise, from the 2nd occurrence of . 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) 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. say . Let’s say we have this String: final static String INPUT3 = "The first word, the second word, the last word should be replaced. 0. Second, I want to replace a character (&) with several characters(amp You may also want to check to make sure your not replacing an occurrence that has already been replaced. Replace the last occurrence of a Substring in a String in Java. replace('p', 'd') would return If you just want to replace the second occurrence of a pattern in a string, you really don't need this "starting from" index calculation. 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. out. public static string ReplaceLastOccurrence(string source, string find, string replace) { int place = source. String: replace second occurrence of comma with line break in string. 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. Stack Overflow. How The second replace() method is added since JDK 1. replaceEach as follows:. It has two forms. Concat it back together with the "2" character. split string. The pattern [a-zA-Z] will match all lowercase English letters (a-z) and all uppercase ones (A-Z). split at all. lastIndexOf(sourceWord); I have a string with this format abc-123-def and I want to replace the first "-" with "_" and the second "-" with ". Calling replace with that string as the argument will perform the replacement throughout the entire string, so it would replace both occurrences. To replace the nth occurrence string first Given two strings S and T and a 2D array replace[][], where replace[i] = {oldChar, newChar} represents that the character oldChar of T is replaced with newChar. input: "HELLO WORLD" output: "HExxxO WORxxxD" In Java, the String. Ditto - same here! 2,480 Views 0 Likes Reply. The length of the new String is a function of the charset, and hence may not be equal to the length of the subarray. The implementation assumes that the caller will escape the string beforehand or will only pass strings that are without the characters in the I'd like to replace all instances of a substring in a string but String. I want to do this as simply as possibly without needing to import any util or use arrays. quote method which escapes all the regex meta-characters. replace() The second signature replaces every occurrence of the target substring (represented as a CharSequence) with the replacement substring. From this "this #?anystring; is #?anystring2jk; test" To This "this is test" how could i do it in java ? 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; The straightforward approach to solving this problem is given in another answer. Next, let’s combine these to standard methods to solve the problem: However with this code I can only find the first occurrence of it and replace it. Replace nth occurrence javascript. 4. length-2)+otherchar. Using Java, I want to go through the lines of a text and replace all ampersand However, how can I replace the character? First, Strings are immutable objects. Many of the regex meta characters (. So for example, with s = "aabbcdbb", and array string "aabbbdbb", you can How to replace first occurrence of string in Java. The charAt method in Java is a fundamental I am making a natural language language processing application in Java, // group 1 match replace with // from match from group 1 // group 1 // repeated // twice or more replacing a character every occurrence in a string in java. Related. In Java programs we often need to modify strings before using them. The Java String Replace has two variants as shown below. Java String get multiple index values. If you want to go the regex route with String#replaceAll(), then you can consider using the following pattern:. *) will greedily consume everything until the last comma, exactly the behavior you want. would return "this. But the second string does not, 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'm looking for the starting position of nth occurrence, in this case the second. split Finding second occurrence of a substring in a string in Java. "pog pance". Java replace only first occurrence of a substring in a string. "; Now, we want to replace the last “word” with “*WORD*” to have the following result: This is somehow a duplicate of this problem Ruby - replace the first occurrence of a substring with another string just in java. those". How to replace second occurence of char in a String? (Java) 3. I think it is the best, because it uses the Java methods as intended rather than trying to reinvent the wheel. indexOf() method finds the first occurrence index of a String in another String. split(delim); elements[0]= "D"; String result = ""; for (String token : elements) { result += token + delim; } System. To know more about more String Methods refer to the article Java String Methods. Viewed 153 times -1 I have a string which needs to be replaced by occurrence. Simple Code. 7. About; No need for jQuery nor regex assuming the character you want to replace exists in the string . A simple solution leverages Apache's StringUtils. Test-case when a character doesn’t exist in the given string:-Enter a String: I love Coding. replacement: replacement sequence of characters. LastIndexOf(find); Then it changes the pattern with the replacement string (in the second half of the string). 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. Here's what I'm currently using and it works, but I would like to Polynomial. substring() method allows us to extract a substring from the input String by providing a beginIndex (inclusive) and optionally an endIndex (exclusive). I am aware of replacing the first occurrence of the string. txt" with "_txt" The result of the String should be . How we can replace the text which is in between the second and third occurrence of "_" with some other text. The logic of the code goes as follows:- We will iterate through the loop until the length of the string becomes 0. replace() method is a simple yet powerful tool for transforming text by replacing characters or substrings within a string. StringBuilder strb=new StringBuilder(myWord); int index=strb. 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. For n=2, the command is: References. Identify short story about scientists spending every second of their lives learning only adding new info in their last days, looking for immortality Replace Last Occurrence of a character in a string. s1 = "2999. Then pass it to sed and tell it to replace the nth occurrence of your string. the result of the above string pairs is: Hello c'Lint and dear Bob. This problem seems like it ought to be amenable to Java 8 I am having difficulty in the following, replacing certain characters from the string There will be two inputs, first will be character and second will be string then I need to replace all those java; string; replace; or ask your own question. 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. private String testStringUtils( 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. Ask Question Asked 6 years, Viewed 1k times 1 Trying to figure out what's the best way to insert a line break after the second comma in a string. Also, the String. replacing a character every occurrence in a string in java. sourceWord is what you want to replace, say AA targetWord is what you want to replace it with say BB. 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. Reading ascii file line by line - Java. You can now build the result using input. Suppose this is the string: /String1/String2/String3/ 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. println I want to remove a pattern with sed, only at second occurence. The first is. String inp = "Monday 02nd January 2017"; I want to replace last two characters from second word. As a bonus, if you want to replace every other duh (i. and the x is to increased every occurrence of L. Finally, pass the output back through tr to recreate the newlines. Replace last char in a string. – Adam Halasz. Commented Jul 31, 2014 Java replace only first occurrence of a substring Java String replaceFirst() Method String Methods. It essentially reads the string backwards and uses the String object's replaceFirst method, this is exactly what I was looking for. Commented May 8, but the second will just return the same string if there is no question mark, or one questions mark As noted in the comment below by @ThomasLeduc and others, there could be an issue with the regular expression-based implementation if search contains certain characters which are reserved as special characters in regular expressions. Returns. Replace() that uses a MatchEvaluator (e. String test = "see Comments, this is for some test, help us" **If test contains the input as follows it should not replace 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. 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. See the below code in action here. Returns: A copy of the string in which the first substring that matches the regular expression is replaced with a new substring. Get index of 3rd comma. 05:23:236 I'm trying to replace the second occurrence of the colon with a dot: 05:23. You just need to avoid one of the most famous performance killers in all of Java - repeated string concatenation. string1="Hello dear c'Lint and dear Bob" and . I'm suppose to replace a "L" in a string every time it is found in the string HELLO WORLD, with "x". Replace String in occurrence using java. Use the returned IndexOf's startIndex +1 for the starting position of the second IndexOf. Here The first string contains HTML, so we call replace() on it. Ask Question Asked 11 String uppercase = s. toUpperCase(); System. myWord is the original word sayAABDCAADEF. lastIndexOf(String str, int fromIndex), passing in the value from the first call. So you can also do: Algorithm. The String. Parameters. 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. Java - Get substring from 2nd last occurrence of a character in string. replace() accepts a pair of char or charsequence and replaceAll When you want to Replace nth occurrence of string. 0. txt > "texty text. If it's in the string, recurse on the the part of the string before the occurrence, and on the part of the string In both C# and java a string is a sequence of UTF-16 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 word1 = "bar returns "1001" string. #1) The In Java, the String. Replace nth occurence of a character by another. 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(). Hot Network Questions When learning about algebra and geometry, should I read roughly or try to understand every sentence?. Those methods allow you to replace character from String, replace CharacterSequence from String, replace all Java String replace() searches for a literal substring and replaces each occurrence with the replacement string beginning with index 0. to the end of the string would return "that". get characters from string by index in java. thus far, Is there an easy way in javascript to replace the last occurrence of an '_' (underscore) in a given string? Skip to main content. 2. So, from the start of the string to the 2nd occurrence of . It has values like 8. Groovy: replaceLast() is missing-1. lastIndexOf(String str), then call input. 1049. 34. g. Java - String replace exact word. private String testStringUtils( In my scenario I want to replace the last bit of a string after a period, or the last word and everything after. final String result = str. How to find index of whole word in string in java. Finding second occurrence of a substring in a string in Java. newChar: new character. The first pattern (. Substring it into two strings at the appropriate index of the "1" character. 1, 11. static String replaceSecondLast(String input, String search, String replacement) { In my application, I am appending a string to create path to generate a URL. java replace substring in string specific index. Others have already stated the correct method of: Escaping the + as \\+; Using the Pattern. 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. 1. My output should be like below. The behavior of this constructor when the given bytes are not valid in the default charset is unspecified. Required. ; Another method that you can use is to put the + in a character class. ^) using tr. This method only replaces the first occurrence of the string found. Regex. Ask Question Asked 7 years, 6 months ago. use Regex. Like this: To find the second last index, first call input. 73. I want to replace the last ". If you want to find the occurrence to replace it, use one of the overloads of Regex. This is an example of the string that's being worked with: xxxxxx[xxxxxx][7][xxxxxx][9][xxxxxx] I'm having a little trouble matching the second occurrence of a match, I want to return the 2nd squ The first occurrence of the $? has to replaced with "there" and second occurrence of the $? has to replaced with "world". println("uppercase "+uppercase); String replace = uppercase. 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} 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. Java String: Replacing string with First replace all the newlines with a unique character that does not occur anywhere else in your file (e. substring(0,str. 0 remove parts of string. substring() method returns a new String that contains a subsequence of characters currently contained in this sequence. Is it possible to add escapes to the pattern that I have or is there a version of replaceAll() in another class which accepts a literal string instead of a pattern? I don't think you need anything particular from Java 8 here. Algorithm. 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. Sorry if my question is foggy, it's not that easy to explain. 3. For e. Technical Details. The charAt method in Java is a fundamental 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 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. but don't Sometimes, the input can contain the same text multiple times, but we only want to replace the last occurrence. Simple rebuild the string using the first and second capture groups, with and in between them. – Jon Skeet. Here's the code: Use bigString. How to implement the same using Java? or Is there any methods available in Apache commons StringUtils to Java: replace multiple string patterns from one string value. txt" on a Linux box does that in about a second – Erich Kitzmueller. The problem consists of checking whether all occurrences of a character can be replaced with a different character in the string s, not the string in the array. Hot Network Questions Cisco control and management plane interfaces C# - indexOf the nth occurrence of a string? Get the IndexOf the first occurrence of the string. Problems with a word guessing game. replace() (that References. The replaceAll() function is a very useful, versatile, and powerful Replace. You need to separate then replace the spaces and then convert into integer, String division = yourString. replaced string. java If you're using C#, you can either get all the matches at once (i. Then just replace whatever index you want with the new desired value. length()) Next, let’s implement this approach and test with our INPUT string: I am having a string with the format as abc_1234_01233456_DC . 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. The substring begins at the specified start and extends to the character at index end - 1. String 's replace() and replaceAll in a string with the second substring (second argument). second, fourth, sixth, etc), then just invoke replaceAll instead of replaceFirst. 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. Constructs a new String by decoding the specified subarray of bytes using the platform's default charset. Django templates: Get current 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 What I want to do is take a string such as "this. ainb prlzmavo ytolh kkt rvoma mmgl utqke rhouv tzldm vkir