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Java String Replace Example

Submitted by Andr on Tue, 10/26/2010 - 20:20

Java Examples

/*
Java String replace example.
This Java String Replace example describes how replace method of java String
class can be used to replace character or substring by new one.
*/
 
public class JavaStringReplaceExample{
    
    public static void main(String args[]){
       
        /*
        Java String class defines three methods to replace character or
        substring from the given Java String object.
       
        1) String replace(int oldChar, int newChar)        
        This method replaces a specified character with new character
        and returns a new string object.
       
        2) String replaceFirst(String regularExpression, String newString)        
        Replaces the first substring of this string that matches the
        given regular expression with the given new string.
       
        3) String replaceAll(String regex, String replacement)        
        Replaces the each substring of this string that matches the
        given regular expression with the given new string.
        */
       
        String str="Replace Region";
       
        /*
        Replaces all occurrences of given character with new one
        and returns new String object.
        */
       
        System.out.println(str.replace( 'R','A' ));
       
        /*
        Replaces only first occurrences of given String with new one
        and returns new String object.
        */
       
        System.out.println(str.replaceFirst("Re", "Ra"));
       
        /*
        Replaces all occurrences of given String with new one and
        returns new String object.
        */
       
        System.out.println(str.replaceAll("Re", "Ra"));
       
    }
 
}
 
/*
OUTPUT of the above given Java String Replace Example would be:
Aeplace Aegion
Raplace Region
Raplace Ragion
*/

Andr's blog

thanx a lot.... it helped me

Submitted by Anonymous on Wed, 01/05/2011 - 17:20.

thanx a lot.... it helped me very much...

it very good.

Submitted by Anonymous on Sun, 07/24/2011 - 09:19.

it very good.

Good thing about replace()

Submitted by Anonymous on Wed, 11/30/2011 - 14:12.

Good thing about replace() method is that it accept regular expression similar to split of String Class which allow you to replace character matching to your regex, which is very convinient and flexible way of doing it.

relaceAll() method has a

Submitted by Anonymous on Tue, 12/06/2011 - 07:39.

relaceAll() method has a special behavior if you use escaped double quotes they will be unescaped. So: "a string".replaceAll("string", "\"mirror\"") will not produce a \"mirror\". Instead, the escaped double quotes will be unescaped and thus the output will be a "mirror". you can use JDK5 repalce(charSequence) to avoid this. See Java String replace example with regex for more details.

thnks a lot ..it helped me

Submitted by Anonymous on Tue, 01/18/2011 - 15:15.

thnks a lot ..it helped me very much.

Thanks a lot.......

Submitted by Anonymous on Tue, 02/01/2011 - 15:42.

Thanks a lot.......

How do I replace a \ with

Submitted by Anonymous on Fri, 03/04/2011 - 07:03.

How do I replace a \ with nothing?

we can not replace \. If any

Submitted by Anonymous on Tue, 03/08/2011 - 15:48.

we can not replace \. If any body have solution for this,please post here. thanks Indian.

How do you replace '[' and

Submitted by Anonymous on Thu, 03/17/2011 - 09:02.

How do you replace '[' and ']' with space?

to replace \

Submitted by Anonymous on Fri, 04/01/2011 - 07:56.

to replace \ use string.replace("\"", "");

and to replace '[' & ']' use

Submitted by Anonymous on Fri, 04/01/2011 - 13:27.

and to replace '[' & ']' use string.replace("[", " ").replace("]", " ");

Thank you very much

Submitted by Anonymous on Wed, 10/19/2011 - 21:58.

Thank you very much Dude.............SOOO helpful answer and I am soooo thankful to you....:)

To Replace \ with "str"

Submitted by Anonymous on Fri, 04/08/2011 - 14:12.

To Replace \ with "str" replace("\\","str")

can we replace String with

Submitted by Anonymous on Wed, 05/04/2011 - 12:56.

can we replace String with regex

how do I replace " (inch

Submitted by Anonymous on Wed, 06/08/2011 - 12:44.

how do I replace " (inch symbol) character with some other character ?

There was a questions on an

Submitted by Anonymous on Thu, 07/21/2011 - 07:06.

There was a questions on an interview to replace a given character from String ? what do you recommend for that converting string into String as suggested here or directly using String.