Question

Need to figure out what is the difference between ... and arrays in JAVA, also an array list.

It seems we can use both as unlimited, but ... is rarely used.

Really appreciate any help you can.

Answer 1

The three dots can only be used in a method argument, and are called ‘varargs’. It means you can pass in an array of parameters without explicitly creating the array.

private void method(String[] args) {} is called like method(new String[]{"first", "second"});

private void method(String... args) {} is called like method("first", "second");