public class String4   
{
	public static void main ( String [] args )   
	{
		String str1 = "Hello!";
		int len = str1.length();  //len == 6
		System.out.println ( len );

		String str2 = "Hello!";
		char ch = str2.charAt(4); // ch == 'o'
		System.out.println ( ch );

		String str3 = "Hi World!";
		int m = str3.indexOf("World"); // m == 3
		int n = str3.indexOf("Sun");   // n == -1
		System.out.println ( m + "    " + n );

		String str4 = "Hello World!";
		int x = str4.indexOf('l', 5);  // x == 9
		int y = str4.indexOf('l');  // y == 2
		System.out.println ( x + "    " + y );
	}
}