String a = "Java is great.";
System.out.println(a);
String b = a.substring(5); // b is the String "is great."
System.out.println(b);
String c = a.substring(5,7);// c is the String "is"
System.out.println(c);
String d = a.substring(5,a.length());// d is "is great."
System.out.println(d);
