Java - String replaceFirst() Method

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Description

This method replaces the first substring of this string that matches the given regular expression with the given replacement.

Syntax

Here is the syntax of this method −

public String replaceFirst(String regex, String replacement)

Parameters

Here is the detail of parameters −

• regex − the regular expression to which this string is to be matched.

• replacement − the string which would replace found expression.

Return Value

• This method returns a resulting String.

Example

Live Demo

import java.io.*;
public class Test {

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

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

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

This will produce the following result −

Output

Return Value :AMROOD
Return Value :Welcome to AMROODpoint.com

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