class stringExample
{
		public static void main(String args[])
		{
				String st1="This is a String example";
				System.out.println("before changed,st1 = "+st1);
				String st2=st1.toLowerCase();
				System.out.println("after changed,st1 = "+st1);
				System.out.println("st2="+st2);
						
		}
}