How to pass array parameter with inline declare?

Question

I have a method as

private void show(Object[] arr) {
  for (Object o : arr) {
    System.out.println(o);
  }
}

I would like to call this method as

// belows are not valid but I'd like to achieve 
show({1,2,3});
show(new String["a","b","c"])

but I don't want to create an array to call this method. (Please don't be suggest to change the signature of my show method.This is just an example.Actual method that I use is from 3rd party lib.)

How can I achieve this by utility classes or anything else?

Answer 1

You can either use varargs as mentioned in the comments or declare the array this way:

show(new String[] {"a","b","c"})

Answer 2

Create a varargs wrapper method:

private void myShow(Object... arr){
    show(arr);
}

// No change to your existing 3rd party method:
private void show(Object[] arr) {
  for (Object o : arr) {
    System.out.println(o);
  }
}

You can then call the wrapper method like this:

myShow("a","b","c");
myShow(1,2,3,4);

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Hope this helps!