public class String5   
{
	public static void main ( String [] args )   
	{
		String greeting = "Hi World!";
		greeting = greeting.toLowerCase();      // returns "hi world!"
		System.out.println ( greeting );

		String greeting2 = "Hi World!";
		greeting2 = greeting2.toUpperCase();      // returns "HI WORLD!"
		System.out.println ( greeting2 );

		String needsTrim = "  trim me!  ";
		needsTrim = needsTrim.trim();             // returns "trim me!"
		System.out.println ( needsTrim );

		String sample = "hamburger";
		sample = sample.substring(3);          // returns "burger"
		System.out.println ( sample );

		String sample2 = "hamburger";
		sample2 = sample2.substring(4, 7);       // returns "urg"
		System.out.println ( sample2 );
	}
}