Java Example - String Replacement

How to replace characters in a string using java?

In the following example, we use the replace method of the java String class to replace characters in the string:

public class StringReplaceEmp{
   public static void main(String args[]){
      String str="Hello World";
      System.out.println( str.replace( 'H','W' ) );
      System.out.println( str.replaceFirst("He", "Wa") );
      System.out.println( str.replaceAll("He", "Ha") );
   }}

The output result of the above code example is:

Wello World
Wallo World
Hallo World

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