var-args

[suavedeep kaur]

hi please can anyone explain me the functioning of var-args with an example ???

[Swastik Dey]

var args can be used to call a method with different number of arguments

class A{
	public static void main(String args[]){

		//called with 3 arguments
		printStrings("1","2","3");

		//called with 1 argument
		printStrings("XYZ");

		//called with 2 arguments
		printStrings("a","b");
	}

	public static void printStrings(String... arg){
		for(String x:arg){
			System.out.println(x);
		}
	}
}
    

[suavedeep kaur]

thanks alot nice example

[Campbell Ritchie]

Nice example, but you ought to add two warnings.

You can get no end of confusion if you also have a method like printStrings(String s2, String s2, String s3)

You cannot use varargs where there might be confusion with a method like printStrings(String[] arg)

[gurneeraj singh]

If you are really confused that which method will be called, always remember that var-args method is the last option used by java.

example:

class A{
 void stuff(int a, int b, int c){
  System.out.println("method A")
 }

 void stuff(int...a){
  System.out.println("method B")
 }
}

class B{
 public static void main(String...args){
  A ob=new A();
  ob.stuff(1,2,3);
 }
}

In above example "method A" will be printed.

There are some rules related to Var-args do read them aswell.