Replace second occurrence string java

Replace second occurrence string java. replace () Method. Time Complexity: O (len), where len is Let’s look at some examples of replace () method. So let’s go ahead and define the replace-nth-occurrence. Test-case when character exists only once:-. It's because the replace () method replaced the first zz with x. Jan 8, 2024 · Overview. replaceFirst(" " + b + " ", " " + c + " "); System. I have some regex finding the first square backets with numbers in a string: \[+[0-9]+\] This returns [7], however I want to return [9]. If pattern is a string, only the first occurrence will be replaced. replace () The replace () method of String values returns a new string with one, some, or all matches of a pattern replaced by a replacement. The search for substring starts from the beginning of the string i. Additionally, we delay the substitution function’s execution until we have the last line in the pattern space. index. 1. Oct 12, 2023 · To replace all occurrences of a substring in a string in Java, we can use one of the following methods: 1. 1049. Example: String one = "Düsseldorf - Zentrum - Günnewig Uebachs" String two = "Düsseldorf - Madison" I want to split the above Strings and get the last item: Dec 25, 2021 · String folderPath = path. 0 I want to split the Feb 6, 2024 · Find The Second Occurrence Of A Substring Using str. Dec 22, 2010 · Another solution, you can solve your problem using replaceAll with some regex ^. substring(pos+1) or use one of the regular expressions from the other answers. The pattern can be a string or a RegExp, and the replacement can be a string or a function called for each match. Java already has a built in method in String for this. str. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. toCharArray(); boolean lFound = false; Java String replace () - replaces each matching occurence of a character in the string. There are two types of replace() methods in Java String class. htmlEscape (String input) which will handle the '&' to '&' translation. In the following example we are have a string str and we are demonstrating the use of replace() method using the String str. This can be done using the methods listed below: Using String. String. replace () method. 0. prototype. replace(". Let’s write the code for this −const str = 'aaaaaa'; const subStr = 'a'; const num = 6; . txt" with "_txt" The result of the String should be . The size of the Array can change. var pos = str. The output of the above code is xz, not zx. Case1: If the user enters the string ‘Python is fun’. length); String replaceAll(String regex, String replacement): It replaces all the substrings that fits the given regular expression with the replacement String. You can use the the replace () method to replace all occurrences of the given character in the String with the another character. 12 or 2. int firstIndexOfAAA = withA. I want to replace all the occurance of ". Find the first repeated word in a string in Python using Dictionary. NullPointerException-replace() method returns this exception when the target char/CharSequence is null. replaceFirst ("allb", "o"); System. 4"; System. Find the first repeated word in a string. Sep 15, 2023 · Second most repeated word in a sequence in Python. int charACount = 0; // get the first index at which more than two 'aa' occurred in a row. Share. Jan 23, 2017 · First of all, you can't replace in a Java String. Explanation. The following example code removes all of the occurrences of lowercase “ a ” from the given string: String str = "abc ABC 123 abc"; String strNew = str. 00_GRB_1" and s2 = "my File. Another Approach: Convert the String into a char array, and declare a variable lFound gonna look for the first occurrence of letter l, if it found next l will be converted to k and exit the loop by break. " in a string with empty space. And these values are not of fixed length(can be any length) And I need to replace only second occurrence of '/' with another string that means the Output should be. Oct 17, 2015 · ----- first occurrence ----- second occurrence These two occurrences overlap at the comma, and thus Java can only replace one of them. Expected output "1 something 2" This is just small string. It may contain more occurrence of Test in string/word. Oct 20, 2010 · The code returns the nth occurrence positions substring aka field width. The output should be ‘Pyth-n is fun’, as the character ‘o’, is first vowel occurs in the string so it is replaced by ‘-‘. Sep 25, 2023 · String. 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. Let’s look at a simple example to replace all the occurrences of a character with another character. substring(index + str. i. Or, if you prefer using java 8 kung fu: Jun 6, 2021 · In this program, we will be discussing various methods for replacing multiple characters in String. public class Main { public static void main (String [] args) { String originalString = "Hello World"; Oct 11, 2023 · The replace () method is an overloaded method and comes in two versions: public String replace(char oldChar, char newChar); public String replace(CharSequence target, CharSequence replacement); The first method accepts the char types. If you want to find the occurrence to replace it, use one of the overloads of Regex. e the return string should be folder4/ sel <- rep(fn, n*length(rp)) sel[seq_along(rp)*n] <- rp. Signature. e less than s length so ignored arr[2] = sorting : aabbbbdx. replaceAll("\\. js. split("\\$", -1). This method may be used to trim whitespace (as defined above) from the beginning and end of a string. Sep 20, 2023 · Count occurrence of a given character in a string using simple Iteration: Iterate through the string and during each iteration, check if the current character is equal to the given character c then increments the count variable which stores count of the occurrences of the given character c in the string. OutPut -->_bcdef__. We can also pass the Unicode value of the character. For example: java String str = "1. 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). replaceFirst("-", replacement); } This will replace each - in the order of replacements array. Here's an example using replaceFirst: String str = "gallbladder"; str = str. 29) Remove Character From a String Java :- Write string programs in Java to remove the first or last character from the given string. That's what the warning message is telling you. I am really looking for the replacement and not the removal. If you're using C#, you can either get all the matches at once (i. The String. Replace (String, String, MatchEvaluator). If we update the string: let originalStr = 'The grey-haired husky a blue left eye and a blue right eye. In this tutorial, we’re going to be looking at various means we can remove or replace part of a String in Java. Feb 19, 2016 · String methods String#indexOf, String#lastIndexOf can be used with String#substring. A repeated capturing group will only capture the last iteration. Maximize count of 1s in an array by repeated division of array elements by 2 at most K times. 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. You can use. text = text. Sorted by: 5. Then, use bigString. The Unicode code of ‘o’ is ‘\u006F’ and the Unicode code of ‘O’ is ‘\u004F’. lastIndexOf(needle); nThIndex = 0; while (counter--) {. 5, a new replace() method is introduced that allows us to replace a sequence of char values. A sequence which serves as a placeholder to be replaced should (or must ) be different from a literal, e. Replacing a Character in the String. List<Integer> indicesList = null; int index = source. . I'm using Javascript's replace function, the following regex matches the Code to remove the duplicate characters in a string without using any additional buffer. The default given by AppSync is as follows: Dec 18, 2017 · 1 Answer. I have changed the characters to "-",I am able to get the indices of the input but I am not able to convert back the "-" to the characters entered. 3. Using replace () or replaceAll () method. \- matches the character - with index 4510 (2D16 or 558) literally (case sensitive) + matches the previous token Jan 29, 2015 · In my scenario I want to replace the last bit of a string after a period, or the last word and everything after. A very noob question. second, fourth, sixth, etc), then just invoke replaceAll instead of replaceFirst. Compare your solutions with other developers on Stack Overflow, the largest online community for programmers. regmatches(x, gregexpr(fn, x)) <- list(sel) Using both regex and gsub. Sorted by: 1. In the printIndex () function, if the substring is found, the function Oct 9, 2020 · 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. Mar 31, 2011 · Replace last underscore in a string. Oct 3, 2022 · String::replace replaces every occurrence and therefore its use for your requirement is not right. if string "Stack overflow in low melow" is the string to search 2nd occurance of token "low", you will agree with me that it 2nd occurance is at subtring "18 and 21". : It is important to note that the replace () method replaces substrings starting from the start to the end. For example, "zzz". results () with a single line of code. Then you can get any nth index. lastIndexOf ("at")); You can use the value returned by lastIndexOf () to set the attributes of Nov 9, 2022 · You can remove all instances of a character from a string in Java by using the replace () method to replace the character with an empty string. As a bonus, if you want to replace every other duh (i. Hope this article was helpful for you to understand how to use the find(), split() and re. lastIndexOf('_'); str = str. let newStr = originalStr. Feb 16, 2024 · The function uses the find () function to find the first occurrence of the substring in the larger string, and then uses a while loop to find subsequent occurrences. First, we have to provide a pattern that matches exactly with the Input String. Jan 8, 2024 · There are many ways to count the number of occurrences of a char in a String in Java. The output should be ‘-ngineer’, as the character ‘E’, is first vowel occurs in Aug 8, 2016 · It really works good. I have this code of a very basic hangman type game. replace('H', '-'); //Returns -ello. 190" The str can be something like this as well: 1. If you're using Spring you can simply call HtmlUtils. lang. Java String replace() The Java String class replace() method returns a string replacing all the old char or CharSequence to new char or CharSequence. length); Your current code seems to eat one occurrence of 'ZZ Java String Class Methods. quoteReplacement(replace)); Jul 9, 2015 · String str = "abc-123-def"; for (String replacement : replacements) { str = str. So you're going to have to make a new String with the right properties. // Get the index of the next occurence. replace () API searches for a literal substring and replaces each occurrence with the replacement string. Don't expect a built-in library method for every task you want to accomplish. Enter a character: r. ; Use split() on just that substring. Oct 8, 2018 · If the file_string is supposed to be a configurable format string, then it should be improved. use Regex. indexOf(needle, nThIndex + needle. 1. Regex. Most frequent word in first String which is not present in second String. println(s); s = s. println (str); // This will print "goladder". We have replaced all the Aug 10, 2017 · I want to replace the last ". concat (or +). ", " "); //Returns 1 2 3 4 Oct 28, 2015 · StringBuilder replacedString = new StringBuilder(); // counting the number of time char 'a' occurred in String for replacement before row of 'aaa'. Jan 14, 2021 · length of s = 8 sorting s = aabbbbcd arr[0] = has 9 characters i. List<String> list = new ArrayList<>(); StringBuilder item = new StringBuilder(); int delimCount = 0; Nov 15, 2015 · 3 Answers. It produces a Stream of MatchResult objects which correspond to captured substrings, and the only thing needed is to apply Stream. output: "HExxxO WORxxxD". length - 1; Note: Dollar sign is a special Regular Expression symbol, so it must be escaped with a backslash. but don't know how to replace the last occurrence of a string. Alternatively, you can achieve this For example, if you have a string: String myString = “Hello World”; And you want to replace the word “World” with “Earth”, you would call the replaceFirst function like this: myString. replace("zz", "x") // xz. which contains multiple '/' between values. ; Here is one alternate solution that uses only indexOf and substring. For example, "hello" is a string containing a sequence of characters 'h', 'e', 'l', 'l', and 'o'. Here is my regex and replace function With our substring defined, we can now use the find () method again to locate the second occurrence: second_occurrence = substring. You can find the number of occurrences of a substring in a string using Java 9 method Matcher. Your command would only work if the string line appeared more than once on one or more lines. Feb 20, 2021 · java; string; replace; or ask your own question. Suppose this is the string: /String1/String2/String3/ Sep 25, 2020 · To replace all occurrences, you can use the replaceAll () function. replaceAll(". May 6, 2022 · SUBSTITUTE allows you search for a specific character and replace it with another; crucially, you can also specify which occurrence of the character you want to replace. Note that a similar method String. I think it is the best, because it uses the Java methods as intended rather than trying to reinvent the wheel. It searches the string for specified oldChar and replaces each occurrence of oldChar with the newChar. By the help of these methods, we can perform operations on String objects such as trimming, concatenating, converting, comparing, replacing strings etc. Or remove a character from the given position of the string. replace('World', 'Java'); This method is a part of the String class and is used to create a new string by replacing specific parts of the original string. Feb 16, 2024 · It returns a string derived from this string by replacing every occurrence of oldch with newch. A backslash is a special symbol for escape characters such as newlines, so it must be escaped with a backslash. indexOfOccurance ("Stack overflow in low melow", low, 2) returns 18 and 21 in a string. It employs a try-except block to handle the case where the substring A String object is returned, representing the substring of this string that begins with the character at index k and ends with the character at index m -that is, the result of this. e. The result will be as shown below. The substrings that come before and after the target substring are then Jan 9, 2011 · I'm having a little trouble matching the second occurrence of a match, I want to return the 2nd square brackets with a number inside. Exception. 0. Now observe the below Replace Last Occurrence of a character in a string. substring and . Here's what I'm currently using and it works, but I would like to know if a regex would be better for this. Since JDK 1. index 0. length()); Note that 0 % 2==0; therefore, if you want to replace the occurrence number second, fourth, sixth and so on, use count % 2 != 0 in the inner if block. 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. lastIndexOf("+") - 1 )); beginning index will be the index of occurrence index before last occurrence index. In the printIndex () function, if the substring is not found, the function prints “NONE” and returns. "," the first dot and replace the second Mar 1, 2024 · To remove the last occurrence of a character from a string: Use the lastIndexOf () method to get the last index of the character. replaceFirst (String, String): String a = "a creature is a small part of a big world"; String b = "a"; String c = "the"; String d = a. println(d); prints out: a creature is the small part of a big world. In this quick tutorial, we’ll focus on a few examples of how to count characters — first with the core Java library and then with other libraries and frameworks such as Spring and Guava. Test-case when a character doesn’t exist in the given string:-. sed. Method 1: Using String. indexOf; . 1" with "_1" and ". 111. It replaces each substring in the string that Dec 8, 2021 · Given a string "[ something that may contain a brace ], like so]". s1 = "2999. println ("index = " + "I have swimming at school at 7pm". The Overflow Blog Why the creator of Node. Here Test appears two time. g. input: "HELLO WORLD". Index of the second occurrence of character ‘r’ is: 9. index() Method. The following examples demonstrate how to use the replace() method in Java: Jun 5, 2012 · You can use following statement to replace first occurrence of literal string with another literal string: String result = input. substring (k, m + 1) . Getting an array once and accessing it multiple times may be easier. Apr 10, 2014 · In this case, if I ask for 2nd occurrence of slash (/) from last , it appears before folder4, and I expect to return substring from 2nd last occurrence of a character. Java String replace() Examples. Feb 2, 2024 · To replace the first occurance in the string with given replacement String, we make use of the regex pattern matcher. Replace () that uses a MatchEvaluator (e. Braces on the inside of the string need to remain. " var str2 = "Replace last _ with another char other than the underscore _ near the end". String replace = uppercase. {1} ( regex demo) for example : My version of removing leading chars, one or multiple. Enter String: Know Program. public List<String> splitEvery(String source, char delimiter, int num) {. Sep 13, 2013 · How to replace or convert the first occurrence of a dot from a string in java. 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) Nov 7, 2014 · 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"; String word2 = "foo"; String story = "Once upon a time, there was a foo and a bar. txt_txt" How can I do this. Assuming the string you're checking is in A1, use: Jul 28, 2016 · I have a string like : Hi/I/Jack/there. So the first occurrence shall be replaced with 1 and second occurrence replace with 2. Now I want to remove that appended string on pressing back button. This is somehow a duplicate of this problem Ruby - replace the first occurrence of a substring with another string just in java. If count is 2, delete character at i and break. Max length repeating pattern in string2: bdfgh. count () to obtain the number of elements in the stream. Hi/IamJack/there Feb 16, 2018 · Trying to figure out what's the best way to insert a line break after the second comma in a string. Example. String str = "Hello"; str. I am aware of replacing the first occurrence of the string. Oct 21, 2023 · In Java, you can use the replace() method of the String class to replace characters or substrings, like so: String newText = oldText. MM:ss:mmm where MM is minutes, ss is seconds and mmm is 3 digit milliseconds, like: I'm trying to replace the second occurrence of the colon with a dot: 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: Oct 11, 2023 · Java String. needle = 'abc', firstIndex = string. replace x with c and rearranging it makes this as aabbbbcd arr[3] = sorting : aabbbbbd. prototype object and takes in a string str, a character char and a number n. Concatenate the two parts of the string using the addition (+) operator. This method returns a new string resulting from replacing all Output:-. 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. indexOf(needle), lastIndex = string. ", " "); System. replaceFirst (“World”, “Earth”); This would return a new string with “Hello Earth” — the first occurrence of the substring “World Jan 26, 2020 · You can use String. Feb 23, 2013 · I'm suppose to replace a "L" in a string every time it is found in the string HELLO WORLD, with "x". indexOf("aaa") + 1; Nov 1, 2023 · If you want to replace only a specific substring in Java, you can use the replaceFirst method or manipulate the string using the substring method. 4"; str = str. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. An extra array is not: Not optimal, but simple way to count occurrences: String s = ""; int counter = s. subString = str. substr(0, index) + replacement + this. replace("a", ""); Output. Using replaceFirst () method. substring(beginning index,str. The java. Result: HelLo. In Java, a string is a sequence of characters. Using replaceAll () method. index() ` method to find and return the index of the second occurrence of a specified substring in a given main string. Loop through the string. Jan 29, 2024 · Replace the last occurrence of a Substring in a String in Java. Read the documentation for more information: String documentation. replace 1 occurrence of b with c and rearranging it makes this as String2: “acbdfghybdfghabcd”; Max length repeating pattern in string1: bdf. quote(search), Matcher. replaceFirst(Pattern. " Aug 15, 2013 · String manipulation, removing characters until the second occurrence in java script Hot Network Questions Do ALL non-instantaneous deceleration events transfer weight to front wheel? Mar 7, 2018 · In my application, I am appending a string to create path to generate a URL. In this example, the function `find_second_occurrence_index_v2` utilizes the ` str. There are a number of ways to do this, one of which involves iterating over the original String and copying characters unless the current index is a multiple of n. Index of the second occurrence of character ‘n’ is: -1. finditer() methods to find the second occurrence of a substring in a Python string. nThIndex = string. return this. Conclusion. The standard solution to replace all occurrences of a substring with another string is using the built-in method replace () of the String class. It essentially reads the string backwards and uses the String object's replaceFirst method, this is exactly what I was looking for. var str1 = "Replace the full stop with a questionmark. 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. For example, Here, we have created a string variable named type. String s = "1. String class provides a lot of built-in methods that are used to manipulate string in Java. Set a counter for the comma. In this tutorial, you will learn about the Java String replaceFirst () method with the help of examples. May 20, 2020 · 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. Then With the Pattern. Example: Return a new string where all ” o” characters are replaced with “p” character: Java. substr(index + replacement. Then just delete the character at whatever index is stored in the 2nd value of that array. e more than s length so ignored arr[1] = has 7 characters i. Use the slice () method twice to get the parts before and after the character. Java String replace() Method example. Enter a character: n. For a String str2 = "000123" result will be again "123". Now I want to replace the first (and only the first) "ha" with "gurp": string. An example of Java string replace last occurrence. indexOf(substr); Aug 9, 2023 · It takes two arguments – a pattern (in this case, it refers to our substring) and a string. You can replace any character with another given character. The Java String replaceFirst () method replaces the first substring that matches the regex of the string with the specified text. regex is the best alternative, nontheless here's another approach without regex. For example, String str1 = "01234", when removing leading '0', result will be "1234". Case2: If the user enters the string ‘Engineer’. This one can be replace with a string instead of a character. NOTE: One or two additional variables are fine. Use bigString. If character at i is a comma count it. double quotes to represent a string in Java. Dec 28, 2023 · - The replaceAll() method of the String class, which takes two String arguments and returns a new string where every occurrence of the first argument (treated as a regular expression) is replaced by the second argument. substring(0,pos) + otherchar + str. As in: System. js® created a new JavaScript runtime replacing a character every Jun 20, 2014 · Find the substring that contains what you want, by calling indexOf twice. substring(0, path. println(s); Jan 30, 2018 · This is my second question here and still a beginner so please bear with me. length; . replace ("ha", "gurp") doesn't work, as it replaces all "ha" s. use only String methods: . lastIndexOf('/')); But your actual problem is that '/' is not special in Java regular expression syntax and therefore does not need to be escaped with '\'. Here I tried to replace the letter 'a' with "-" character for the give string "abcdeaa". and the x is to increased every occurrence of L. 11. compile () method we compile the regex pattern to a String. Learn how to replace all occurrences of a string in JavaScript with different methods and examples. substring(0, index) + str2 + text. You could also map the string to an array storing the indices of commas. Jun 5, 2022 · For example. replace( 'blue', 'hazel' ); The result would be: The grey-haired husky has a blue left eye and a blue right eye. replaceAll () searches and replaces all substrings using regular expressions. May 20, 2021 · Add a comment. May 14, 2018 · 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. Case 2: I am using the String split method and I want to have the last element. My output should be like below. However, we need to adjust this index to account for the portion of the original string that we excluded with our Mar 18, 2024 · First, we use the N function to append each line except the last one in the pattern space one at a time. Want to learn more about Python and practice Python programming? Jan 2, 2017 · String inp = "Monday 02nd January 2017"; I want to replace last two characters from second word. If you need to replace substrings based on a regular expression, use the Java String Feb 2, 2018 · I have a string which looks something like this(the most basic form): String str = "1. Apr 15, 2011 · Get all the indices in an array. The variable is initialized with the string Java Programming. Try this code. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data. Find out the advantages and disadvantages of using regular expressions, split and join, or replace with a function. 2. Sometimes the neatest way is just to write it yourself. out. Matches (), which returns a MatchCollection, and check the index of the item: index % 2 != 0 ). The start and end brackets need to be replaced with ( and ) or alternatively removed. Feb 24, 2010 · 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. In many cases, it may be required to get the nth index of a substring within a string multiple number of times. Feb 16, 2024 · The String replace () method returns a new string after replacing all the old characters/CharSequence with a given character/CharSequence. String = “Hello” Character to be replace = ‘l’ Character to pace = ‘L’ In the above-given string, the last occurrence of ‘l’ is the second occurrence at the 3rd position, which should be replaced by ‘L’. replace('l', '-'); //Returns He--o. sed script: $ cat replace-nth-occurrence. 190 or 1. '. Delete the backslash that precedes '/'. Jun 10, 2014 · Regex to replace second occurrence of a character. We'll use it to replace the second delimiter with another character that we can then search for - I like to use the Pipe |. So this is what I tried. The function should remove the nth appearance of char from str. String str = "Hello"; char[] chars = str. Java replace only first occurrence of a substring in a string. String str = "Test something Test"; I have to find Test and replace with it's occurrence number. find ("apple") This will give us the index of the second occurrence within the substring variable. Then matcher function is used to extract the matched word from the Apr 12, 2015 · public int lastIndexOf (String str) Returns the index within this string of the last occurrence of the specified substring, searching backward starting at the specified index. We’ll explore removing and/or replacing a substring using a String API, then using a StringBuilder API and finally using the StringUtils class of Apache Commons library. They're immutable. fm zc ts ow gp hx iw ie zm vx