Java - String replaceFirst() Method

public String replaceFirst(String regex, String replacement)

• regex -- the regular expression to which this string is to be matched.
• replacement -- the string which would replace found expression.

• This method returns a resulting String.

import java.io.*;

public class Test{
   public static void main(String args[]){
      String Str = new String("Welcome to Dineshonjava.com");

      System.out.print("Return Value :" );
      System.out.println(Str.replaceFirst("(.*)Dineshon(.*)",
                         "SWEETY" ));

      System.out.print("Return Value :" );
      System.out.println(Str.replaceFirst("Dineshon", "SWEETY" ));
   }
}