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Write a java code to explain Else If ?
if statements are not limited to two cases. You can merge an else and an if to form an else if and test a overall range of mutually exclusive possibilities. For example, here's a version of the Hello program in which handles up to four names on the command line: // This is the Hello program in Java
class Hello {
public static void main (String args[]) { if (args.length == 0) { System.out.println("Hello whoever you are"); } else if (args.length == 1) { System.out.println("Hello " + args[0]); } else if (args.length == 2) { System.out.println("Hello " + args[0] + " " + args[1]); } else if (args.length == 3) { System.out.println("Hello " + args[0] + " " + args[1] + " " + args[2]); } else if (args.length == 4) { System.out.println("Hello " + args[0] + " " + args[1] + " " args[2] + " " + args[3]); } else { System.out.println("Hello " + args[0] + " " + args[1] + " " args[2] + " " + args[3] + " and all the rest!"); }
}
}You can see in which this gets mighty complicated mighty fast. No experienced Java programmer would write code like this. There is a better solution and you'll explore it in the further section.
what is the use of design pattern in java ?
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