import javax.swing.JOptionPane;
public class Application {

	public static void main(String[] args)
	{

	}


	{
	String hi = "Hello";
	System.out.println(hi.length());

	System.out.println("Hello".length());

	System.out.println(hi.substring(1));

	System.out.println(hi.substring(1,3));

	System.out.println(hi.substring(3,4));

	System.out.println(hi.substring(1,8));

	String alpha = "abc";
	System.out.println(alpha.substring(1,3).equals("bc"));

	System.out.println(alpha.substring(1,3).equals("Bc"));

	System.out.println(hi.substring(0,1).equals(hi.charAt(0)));

	String day = "Tomorrow";
	System.out.println(day.toUpperCase().toLowerCase());

	System.out.println(hi.indexOf("H"));

	System.out.println(hi.indexOf("h"));

	System.out.println(hi.indexOf('H'));

	System.out.println(hi.indexOf('h'));

	System.out.println(day.indexOf("o"));

	System.out.println(day.lastIndexOf("o"));

	System.out.println(day.lastIndexOf("o",3));

	System.out.println(day.isEmpty());

	String empty = "";
	System.out.println(empty.isEmpty());
	}

















}