Convert uppercase to lowercase in java

Source code below will convert uppercase(HELLO WORLD) to lowercase(hello world)

***************************************************************
COMPLETE SOURCE CODE FOR : ConvertUppercaseToLowercase.java
***************************************************************

public class ConvertUppercaseToLowercase
{
public static void main(String[]args)
{
 String a="HELLO WORLD";
  
    //CONVERT HELLO WORLD TO hello world
    String b=a.toLowerCase();
    a=b;
    System.out.println(a);
}
}

***************************************************************
JUST COMPILE AND EXECUTE IT
***************************************************************