zero length arrays [duplicate]

Question

Possible Duplicate:
What is the usage of array of zero length?

What is the purpose of zero length arrays.Are they of any use or just like that because the syntax allows?

Answer 1

If you have a function that takes an array, and you want to give it an array with nothing in it, you pass an zero-length array.

If you read an array from an external source, and it happens to not have any items, you'll get an zero-length array.

Answer 2

Assuming you mean in Java, you can iterate over zero-length arrays without any problem but you can't do this, if the variable is set to null.

String[] myArr = new String[0];
for (String str : myArr) {
  // do something here
}

If you set myArr to null instead, you'd get a NullPointerException in this loop.