Replace a string with another string java

• Replace a string with another string java. HOME; Android; java. StringBuilder builder = new StringBuilder(); Append the part before the last occurrence. The (?<=^. substring(path. replaceAll("AM", "AM ET"). ) that is preceded with 0 to 6 chars at the start of the string. It simply replaces the first 5 characters. indexOf (String str) method. The first parameter replaceAll takes is a regex, and the regex engine treats $ as a special character that stands for the end of the line. That's not the problem, so I left that out for simplicity. I am doing this with String. replaceFirst(" "+word+" ", " is not "); } replace function replaces all the occurences of the word you give, and you are giving it "is" which is included in "this", just put some spaces to prevent this. Follow the steps below to solve this problem: Initialize a string ans Dec 3, 2016 · string = string. I have string: String a = "I want to replace some words in this string"; It should work like some kind of a translator. But check Can I use or another compatibility table first to make sure the browsers you're targeting have added support for it first. Using replaceFirst () method. You need to apply the replacement element-wise; the only difference vs doing this on a single string is that you need to get the value out of the list, and set the new value back into the list: ListIterator<String> it = DNAsplit. replaceAll(), but it doesn't work completely because of Java – Replace a String in File. String are immutable in Java. You would probably want to use the StringBuilder class to create your new string. For example, "zzz". listIterator (); while (it. replaceAll("\\$", ""). For example: String sourceCharacters = "šđćčŠĐĆČžŽ"; String targetCharacters = "sdccSDCCzZ"; String result = replaceChars("Gračišće", sourceCharacters , targetCharacters ); Assert. Find out different approaches and solutions from Stack Overflow experts. Oct 14, 2022 · Replace a Particular Word by Another Word . replace("is", ""); output: "not like , but Nov 3, 2011 · a String in java is immutable - you can't change it. The modified string is assigned to the variable newstring. map(toRem-> (Function<String,String>)s->s. indexOf(" "); And put it on looping. The replace () method searches a string for a value or a regular expression. Apr 27, 2014 · Create a StringBuilder (you can just concatenate Strings if you wanted to). replaceAll(myPattern, myReplacement); IOUtils. Returns the index within this string of the first occurrence of the specified substring. reduce(Function. Thus the message = message. You can use Matcher. Scanner s = new Scanner(str); Sep 5, 2023 · Use the replaceAll method to replace all occurrences of the toReplace substring with the replacement string. Oct 26, 2023 · To replace only the last occurrence of a substring in a Kotlin string, you can use an extension function. Unmute. So for example the first string is need to be change to: So for example the first string is need to be change to: May 29, 2017 · 1. String newString = string. replace () The method replace () replaces all occurrences of a String in another String or all occurrences of a char with another char. 8 version Already in one of the previous article, we discussed how to replace a String with another String using earlier versions of Java like 5 or 7 , etc. replace('H', '-'); //Returns -ello May 8, 2012 · You need to do in temp [0] as well. Today we will learn about how to replace a particular word with another Given a string and a word, the task is to remove the word from the string if it exists, otherwise, return -1, in java programming language. The method replaceAll () (or almost all other methods in String class) hence are designed to return a new string rather than modifying the old one. substring(0,index); Dec 18, 2022 · Learn how to use Java to generate strings with placeholders, such as "Hello {name}!". replace () with Character, and String. replace("zz", "x") // xz. Rythm a java template engine now released with an new feature called String Feb 15, 2014 · As u havn't succeeded to replace '!' . appendTail(sb); System. Like so, assuming that you are actually looking for URL-compatible Strings only: test[index] = URLEncoder. This method may be used to trim whitespace (as defined above) from the beginning and end of a string. The example in the JavaDoc looks like this: Pattern p = Pattern. If you are stuck on an older Java, you can do: String content = IOUtils. matcher("one cat two cats in the yard"); StringBuffer sb = new StringBuffer(); Apr 15, 2017 · Look at JavaDoc of replaceAll method of String class:. 0. Let’s discuss how to use the java replace() method and replace characters in Jan 24, 2013 · I can't figure out how to replace a string with a string,in my program while it's running. toString(new FileInputStream(myfile), myencoding); content = content. replace(oldString,newString); You can use IntStream over the indices of this array and process certain strings in a certain way: // to filter the certain strings, or you. Escape it with \ like this: String temp_data = DATA. You should use replaceFirst if you want to replace only the first 1. You can use the the replace() method to replace all occurrences of the given character in the String with the another character String str = "Hello"; str. This is one way. valueOf(str). s = s. replaceAll("\\. apply 1. The output of the above code is xz, not zx. split(",") Sep 30, 2015 · Sorted by: 10. This method returns a new string resulting from replacing all Apr 26, 2023 · Input: S = “geeksforgeeks”, S1 = “eek”, S2 = “ok”. index = builder. stringArray[i] = stringX. Then you can iterate through the array in reverse order to recreate a new String with the words in reverse order. Jul 21, 2018 · And then lets test the length of String one after the code executes: System. Use the String. appendReplacement () / appendTail () to build very flexible search-and-replace features. The basic idea is that, we shall read the content of the text file, replace the string with new string in the content of file, and then Mar 4, 2024 · The replace () method is called on string, using a regular expression to match the substring 'GeeksForGeeks' and replace it with 'gfg'. It is mostly used in string substitution. It will replace every occurrence of that substring, so it should be used with caution. replace (". Replacing a Character in the String. At the end of this Java String comparison tutorial I'll also discuss why the "==" operator doesn't work when comparing Java strings. Sorted by: 7. Jun 27, 2015 · However with this code I can only find the first occurrence of it and replace it. drawPixmap(Assets. Apr 2, 2013 · In this tutorial I'll demonstrate several different ways to correctly compare Java strings, starting with the approach I use most of the time. Have a look at Retrieving and Replacing number in text file which is pretty much the same. We can replace the character at a specific index using the method setCharAt (): public String replaceChar(String str, char ch, int index) {. 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 Nov 27, 2013 · If SUM is just a String and not a method then you can use: String Replace = "SUM(" + NewCounter + ")SUM(" + NewCounter2 +")" + NewCounter3; If Sum is a method then you can use. String myName = "domanokz"; String newName = myName. You can also look at using a regular expression to replace all characters at once instead of doing it one at a time. System. Apr 18, 2013 · So in a string, this would be one backslash: "\\", to escape the backslash in a regex, it has to be preceded with a backslash, just as in a string, so you need two backslashes for one backslash in a regex. public static String getMaskedValue (String value) { return value. println(myString); Output: Nov 15, 2013 · If you really want to replace a sequence at a certain index of a String, use a StringBuilder: String replaced = new StringBuilder(date) . Oct 30, 2013 · 2. You can't change them. And insert the key with replacements from the value. println(newString); If you do want to achieve it Nov 29, 2014 · String alphaAndDigits = ALNUM. 25. charAt(place))+str. Let’s look at a simple example to replace all the occurrences of a character with another character. It does not change the original string but returns a new one. Another method is String. str. replaceAll(regex, repl) yields exactly the same result as the expression Feb 20, 2011 · A simpler solution is to use StringBuilder objects to search and replace text. e. StringBuilder sb = new StringBuilder(); java. This means, to represent \ in replacement we need to escape it twice: once in regex syntax, \\-> \ and once in string literal "\\\\"-> \\ So code using replaceAll could look like: Dec 21, 2021 · A better solution would be to scan word by word, replacing only a match is found. Jan 27, 2014 · First of all, since Strings are immutable in Java, you have to re-assign the changes in a String to another reference: path = path. out. A simple way to fix the issue would be to just add spaces around the = in your replace: String replaced=rplaceString. We can also pass the Unicode value of the character. In Java, a string is a sequence of characters. The pattern can be a string or a RegExp, and the replacement can be a string or a function called for each match. Syntax : public StringBuffer replace( int first, int last, String st) Parameters It is important to note that the replace () method replaces substrings starting from the start to the end. static String replaceChars(String str, String searchChars, String replaceChars) Replaces multiple characters in a String in one go. Sep 28, 2011 · The 'message. length(), to); index += to. See the below code in action here. The replace () method does not change the original string. substring(3+3); System. asList("1", "2", "3"); String text = "Hello 1 2 3"; text=toRemove. Edit: Regarding your update, I would just use BufferedReader and BufferedWriter and leave it to the JVM to optimise reads/writes, i. Replaces each substring of this string that matches the given regular expression with the given replacement. Take a look at the String API. replaceAll(toRem, "")) . substring(str. com Jan 8, 2024 · Java String. string. replace("to", "xyz"); API Docs. Let’s look at some examples of replace () method. When Java compiler sees two slashes, it replaces them with a single slash. Old:TEST | New: 3ES3. In the main method: Initialize the original String with the input string. For example, Here, we have created a string variable named type. hstring. compile("cat"); Matcher m = p. ×. A null reference passed to this method is a no-op, or if any "search string" or "string to replace" is null, that replace will be ignored. Example : input:- This is the prepinsta; Output: This is prepinsta replace string with another string - Android java. You can replace these lines: String a=path. An invocation of this method of the form str. String Replace = SUM(NewCounter) + SUM(NewCounter2) + NewCounter3; Although for the second one you may have to cast/convert to a string by surrounding it with. builder. Jan 13, 2019 · For your specific problem ( replacing the first 'a'): public String replaceFirst (String regex, String replacement) Replaces the first substring of this string that matches the given regular expression with the given replacement. List<String> toRemove = Arrays. I would do the replacements in a streaming fashion. picstart , 128, 160); Jan 8, 2024 · We can get the same effect by using StringBuilder. The String class is immutable, so, it returns a new String. May 20, 2019 · chaine=chaine. replaceFirst("1","2"); because replace will replace all occurrences of 1 in abc. The replace (int start, int end, String str) method of StringBuilder class is used to replace the characters in a substring of this sequence with characters in the specified String. And here is your output: The length is: 25. replace("to", "xyz"); or. Use substring, and manually create the string that you want. substring(0, start)); Append the String you want to use as a replacement. toString(); } Copy. Not so efficient but may solve your purpose Aug 20, 2023 · Java String replaceAll () Method. Now, you can replace the last two indices with whatever string you want. String [] temp = String. Copies this string replacing occurrences of the specified target sequence with another sequence. But even with format (), you can't avoid concatenation. If your format for storing strings is the same for all intances, what you can do is :- Search for that particular string, create a string array by using delimiter which is ',' in your case, replace your string at that particular index in that array, and replace back in your text file. toUpperCase(str. Here's a Kotlin extension function that accomplishes this: Kotlin: This only works for Java 7 or newer. That is: String s="aaaaa"; String res=s. So, for your case you can do it like, String example = "the sun was shin- ing and the sky bl- ue"; System. replace("{{customer}}","John"); System. Is this even possible ? While the program is running, I want to replace a word with another and then continue running from that line. How could i do this ? thanks all. replace () The replace () method of String values returns a new string with one, some, or all matches of a pattern replaced by a replacement. For repeating replaces, call the overloaded method. StringBuilder myString = new StringBuilder (str); myString. replaceFirst("a","bbbb"); For a general solution: Apr 18, 2023 · StringBuilder replace () in Java with Examples. replaceAll ("%%name", uname); line of code re-assigns which block of memory the message pointer is pointing at. Returns: Nov 9, 2010 · 3 Answers. String replaceZero = "Java"; String replaceOne = "C#"; . May 19, 2012 · Viewed 96k times. Example: "Today we have an IKAR ME123 from Greece. so for a another approach instead of replace you can tokenize your string using StringTokenizer as this piece of code. replace () method. You need to create a new string with the character replaced. Sorted by: 10. replace () with CharSequence. length(); // Move to the end of the replacement. final String result = str. int place = 2; str = str. The Unicode code of ‘o’ is ‘\u006F’ and the Unicode code of ‘O’ is ‘\u004F’. Feb 22, 2011 · 4. Using replaceAll () method. In the following example we are have a string str and we are demonstrating the use of replace() method using the String str. hasNext ()) { // Get from the list. replaceAll("abc", "xyz"); // `result` is "1 xyz 2 xyz 3". 1 Yes, I know the anchor link is broken. d. ", "*"); } See the Java demo online. The String replaceAll method in Java searches for a specified string or a specified value, or a regex expression by virtue of which has the same suggests returns a new string with related characters. Nov 2, 2016 · 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. Apr 22, 2020 · 1 Answer. I'm trying to remove a specific word from a certain string using the function replace () or replaceAll () but these remove all the occurrences of this word even if it's part of another word! Example: String content = "is not like is, but mistakes are common"; content = content. replaceAll("abcd", "dddd"); System. Return the modified string. Oct 24, 2013 · I want to be able to replace all the letters in a string with an underscore character. We have replaced all the Nov 11, 2014 · Add a comment. int index= sMessage. stream() . The code below prints both columns and the entries that are invalid in the format that I've set; however, for the values that are invalid, the program just prints the value. util. Jul 21, 2015 · I want to replace words in a string, but I am having little difficulties. length()); path. encode(test[index], "UTF-8"); To conform to current Java, you have to specify the encoding - however, it should always be UTF-8. See full list on baeldung. Using replace first will replace the first occurence, instead of replace which replaces everything. So for example, lets say that my string is made up of the alpha characters: "Apple". The first occurrence of 'GeeksForGeeks' in the string is replaced with 'gfg'. println(example. Feb 16, 2024 · The String replace () method returns a new string after replacing all the old characters/CharSequence with a given character/CharSequence. If pattern is a string, only the first occurrence will be replaced. substring(5); Or you can use a StringBuilder: Feb 14, 2012 · 5 Answers. replaceAll("PM", "PM ET"); System. println(replacedStr); Note that replaceAll expects a regular expression. Follow. String abc = "122222"; abc = abc. static String replace2(String str, String[] oldstuff, String[] newstuff){. replaceAll(key, value) for each entry in the map : Replaces all occurrences of Strings within another String. {0,6}). " Mar 1, 2021 · Using String. Use the replace method on the String object to do this. Apr 16, 2010 · I like to replace a certain set of characters of a string with a corresponding replacement character in an efficent way. equals(result,"Gracisce") == true; StringBuffer sb = new StringBuffer(); while(m. replaceAll (" (?<=^. setCharAt(index, ch); return myString. public String replace (CharSequence target, CharSequence replacement) Since: API Level 1. substring(0,place)+Character. Naive Approach: The simplest approach to solve the given problem is to traverse the string S and when any string S1 is found as a substring in the string S then replace it by S2. replaceAll("false", "f"); Oct 8, 2015 · May I know the fastest way to replace two strings in java? Here is the sample code: String template = "I replace {0} and {1} at one time". Here is the output: Total T: 2. framework. replace('l', '-'); //Returns He--o str. Java String replace() Method example. This can be done using the methods listed below: Using String. pattern matches any char (but a line break char, with . Iterate over the Array and replace each entry with its encoded version. appendReplacement(sb, "Milan Vasic"); m. Jan 26, 2020 · One of the columns has three values that are invalid (on purpose) and I want to replace those specific array index values with something like "invalid entry". If you need to replace substrings based on a regular expression, use the Java String Jul 21, 2012 · Petar Ivanov 's answer to replace a character at a specific index in a string question. Your suggested solution of reading to memory could be a bit May 15, 2013 · Add a comment. find()) {. substring (k, m + 1) . 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. Initialize the substring ToReplace with the substring you want to replace. The replace method returns a new String instance: replace String with another in java. Jun 6, 2021 · In this program, we will be discussing various methods for replacing multiple characters in String. double quotes to represent a string in Java. The \u syntax uses hexadecimal and Oct 10, 2013 · So to represent \ in String literal we also need to escape it there by another \ like "\\". Here is what I want to do. public class Main { public static void main (String [] args) { String originalString = "Hello World"; You may use replace () instead of replaceAll () if you don't need regex. TestCase; Oct 26, 2019 · string replace() method uses to replace the content of a String with other content. May 30, 2014 · 3 Answers. Nov 4, 2022 · I am looking for an elegant way to replace a string after a particular word in a text with Java. The pattern [a-zA-Z] will match all lowercase English letters ( a-z) and all uppercase ones ( A-Z ). Here simply the characters in the substring are removed and other char is inserted at the start. replaceAll(" ", ""); Here's an example using replaceAll and replace: import junit. Improve this answer. Dec 20, 2023 · String replace () is a built-in function in Python and it is used to replace a substring with another string. replaceAll ("%%name", uname);' call returns a pointer to a new, different String, aka a different block of memory. Share. println("The length is: " + one. println(sb); This is a nice illustration of the general case, in which the replacement may be computed at runtime. append(replacement); Append the part after the last occurrence from the Jun 6, 2012 · String convertedTime = time. Let us learn about Java replaceAll string method in this article. In the latest versions of most popular browsers, you can use replaceAll as shown here: let result = "1 abc 2 abc 3". replace () is the inbuilt method which is used to replace the characters in a substring of this sequence with the characters in the specified String. You can use the split () method to get an array of all the words. Use a string as the replacement that happens to be only a single character in length: String original = "words"; String replaced = original. replaceAll(String regex, String replacement) Replaces each substring of this string that matches the given regular expression with the given replacement. Example: String myString = "Congrats {{customer}}"; myString = myString. Through replace() function, we can replace the old character or string with the new characters or strings. Finally return result string as output. Feb 1, 2013 · Firstly, you cannot do it 1, since a String is immutable in java. Try this code. valueOf (Object obj): if the argument is null, then a string equal to "null"; otherwise, the value of obj. substring(place+1); Convert the string to array of characters and replace any character that you want by using index, and then convert array back to the string. As in a loop removing and inserting at the same time may be problematic, you could build a second map with the new results, or the other way round, copy the (concerning) keys from the original map first. Nov 15, 2015 · Java already has a built in method in String for this. and by this u can add what u want as for your case at the end of each ! u can add 2 more !!. It is better to create a function that takes a string and does the replacements and call it on both temp [0] and temp [1]. replace('l','o'); From the javadoc of String. You can replace a string in file with another string in Java. length () - 2 to the last character, which is exactly the last two character. If you want to access the last two indices of a string, then you can use: -. replace(a, ""); with: String replaceAll(String regex, String replacement): It replaces all the substrings that fits the given regular expression with the replacement String. Returns: if the string argument occurs as a substring within this object, then the index of the first character of the first such substring is returned; if it does not occur as a substring, -1 is Jun 3, 2014 · Since you can’t use the stream to modify the text variable you have to coerce the operation into one Function which you can apply to the text to get the final result:. length() - 2); This gives you string from index str. Java accepts quantifiers within lookbehind, as long as the length 7 Answers. " I want to replace the word after "IKAR" with my custom string, lets say XXXX , then the text should look: "Today we have an IKAR XXXX from Greece. This method may be used to trim space (as defined above) from the beginning and end of a string. Simple solution is to iterate through the given string and put each unique character into another string(in this case, a variable result) if this string doesn't contain that particular character. It takes two: one that contains the text in lowercase version while the second contains the original version. append(myWord. String in java is immutable, which means, once created, the value of a String object will not change. 3. Jul 18, 2022 · In this article, we will understand with a Java program on how to replace one String (character or sub-string) with another String using Java 1. The search is performed on the lowercase contents and the index detected will also replace the original text. substring(0, 3) + "foobar" + s. Output: goksforgoks. String str = "abcd=0; efgh=1"; String replacedStr = str. lang:String Replace. Android examples for java. substring(0,4)+'x'+myName. Dec 20, 2020 · If, on the other hand, you wanted to replace a sub-string of text [i] which is equal to oldString to newString, you could write: text[i] = text[i]. which of course for a String is itself. Jun 26, 2017 · You have to remove the old keys with a hash sign #, in a loop. you can use pattern matcher as well, which will replace all in one shot. replace(" = ", " == ") Then you would only be matching the standalone = instead of the arrow as well. length()); The output would still be 25, so the code doesn't trim the length of your original String. Note also that, from your question, '\u0130' and (char)130 are not the same characters. format (String, Object) 1, which is analogous to sprintf from C. replaceAll("[a-zA-Z]","@"); If you want to replace all alphabetical characters from all locales, use the pattern \p {L}. prototype. Store the modified string in a variable (modified). ",""); A downside of using replaceAll is the it will be processed as regex, so always prefer replace over replaceAll when possible. replace("picstart", "up1"); g. println("---- Split by comma '!' Mar 24, 2012 · "There are two interpretations of escape sequences going on: first by the Java compiler, and then by the regexp engine. public class LowerCaseReplace. The replace () method returns a new string with the value (s) replaced. println(str); System. Since String is immutable it will return a new object instance with the replaced text. If you're using Spring you can simply call HtmlUtils. When there is t following a slash, Java replaces it with a tab; when there is a t following a double-slash, Java leaves it alone. lang. Method 1: Using String. write(content, new FileOutputStream(myfile), myencoding); Nov 3, 2012 · You will have to write yourString = yourString. valueOf (): String str2 = String. replace () String. When this is done, you can iterate on the map and call String. The string is processed from the beginning to the end. This will not repeat. Here I tried to replace the letter 'a' with "-" character for the give string "abcdeaa". The substring begins at the specified index start and extends to the character at index end – 1 or to the end of Nov 10, 2013 · You replace using regular expressions with String#replaceAll. Dec 13, 2021 · The StringBuffer. toString () is returned. The replaced string newstring is logged to the console. htmlEscape (String input) which will handle the '&' to '&' translation. Java provides the replace() method that overloaded in the string class. Mar 5, 2012 · So i try to replace the newline become whitespace with my function, which is like this: Util. Use String. replaceStr(stringX, "", " "); To assign spilt the string into array string, i detect the index of white space which is. Oct 15, 2011 · static String replaceChars(String str, char searchChar, char replaceChar) Replaces all occurrences of a character in a String with another. The variable is initialized with the string Java Programming. lastIndexOf("="), path. replace(8, 10, "00"). In the following examples, we present you different ways to replace a string in text file with a new string. static String replaceEach(String text, String[] searchList, String Jul 4, 2012 · The way you've written it will implicitly construct a StringBuilder and use it to concatenate the strings. replaceAll("- ","")); or Feb 20, 2015 · builder. You can replace any character with another given character. May 5, 2013 · I need to find the given strings in the list in the long string and replace them with another content (including the [and ] characters). 1. However, you can create a new String object with the desired value, using the String#substring () method (for example): String s = "123456789"; String newString = s. code as. ", ""); @jlordo Ya, I have that too. toString(); Share. m. So the call should be made as. replace(a, ""); Secondly, you are doing extra job out there. For example, "hello" is a string containing a sequence of characters 'h', 'e', 'l', 'l', and 'o'. Apr 27, 2017 · Then, you can for example, parse all the long, convert them to dates and feed a Map which contains the String representation of the long as a key and the text representation of the date as a value. replace("word", "\u0130"); The replaced instance will be equivalent to "İs". indexOf(from, index); The explanation of the better performance of the second solution is that it relays on StringBuilder, a mutable object rather than on String an immutable one. Is there any way to expand this code to replace the words in the entire string? I am attempting to do this without using the replace built in methods in Java since I already know how to use those function, I was wondering if there was another way to go about it. There is no such "replace all" method on a list. Example: Return a new string where all ” o” characters are replaced with “p” character: Java. lang; String Replace Jul 23, 2012 · 6. replace () is used to replace all occurrences of a specific character or substring in a given String object without using regex. println(convertedTime); Due to the simplicity of the above code, I wouldn't really suggest that you use your Pattern-based code - its just too overly-complicated to achieve the same result. Sep 25, 2023 · String. It's because the replace () method replaced the first zz with x. OutPut -->_bcdef__. There are two overloaded methods available in Java for replace (): String. identity(), Function::andThen) . replace(index, index + from. dw vu vr bg dp di ua vh yb jy