args

[meeta gaur]

class Test 
{
	public static void main(String[] args) 
	{
		System.out.println(args==null);

		for(String s:args)
			System.out.println(s);

		for(int i=0;i<=args.length;i++)
			System.out.println(args[i]);
	}
}

false
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0

I ran this code thru IDE.My questions are 1) args is not null then what object it has ? 2) basic for loop causes runtime error then why enhanced for loop doesn't ?
at TestArray.main(TestArray.java:11)

[Ulf Dittmer]

Because your loop ending condition is incorrect. You're accessing the 0-th element even though there is no such element.

[meeta gaur]

Ulf Dittmer wrote:Because your loop ending condition is incorrect. You're accessing the 0-th element even though there is no such an element.

Why enhanced for statement doesn't throw runtime error ? and args is not null then what it refers ? thank you

[meeta gaur]

I think it is String[] args=new String[0]; but don't know how enhanced work with this ,anyways thank you.

[Campbell Ritchie]

Ulf is correct. You are using <= when you ought to use <
If you pass a zero‑length array as args (i.e. write nothing), you will get nothing printed out. The enhanced for loop is not prone to that sort of error. You cannot redeclare args like that.

[meeta gaur]

Yes that' right