Java "params" in method signature?

Viewed 87588

In C#, if you want a method to have an indeterminate number of parameters, you can make the final parameter in the method signature a params so that the method parameter looks like an array but allows everyone using the method to pass as many parameters of that type as the caller wants.

I'm fairly sure Java supports similar behaviour, but I cant find out how to do it.

3 Answers

In Java it's called varargs, and the syntax looks like a regular parameter, but with an ellipsis ("...") after the type:

public void foo(Object... bar) {
    for (Object baz : bar) {
        System.out.println(baz.toString());
    }
}

The vararg parameter must always be the last parameter in the method signature, and is accessed as if you received an array of that type (e.g. Object[] in this case).

This will do the trick in Java

public void foo(String parameter, Object... arguments);

You have to add three points ... and the varagr parameter must be the last in the method's signature.

Related