将 byte[] 作为单个参数传递给可变参数方法

Question

I have a method which has a varargs parameter. It looks like this:

public void sampleFunction(String name, Object... args) {

}

I want to pass a byte[] to this method, but as a single parameter. How can I do this?

byte[] myByteArray = functionReturningAByteArray();

sampleFunction("Name", myByteArray);

Will this be considered as an array or, will myByteArray is considered as a single object?

When I passed the byte[] , IntelliJ reports it as Confusing primitive array argument to varargs method . I tried to cast myByteArray to an Object as it suggested, then it reports it as redundant cast.

I want to pass it as a single object.

Answer 1

A byte[] is a primitive array, so it is definitely not an Object[] . Therefore, it will be passed as a single Object instance to your vararg method.

If, on the other hand, you would pass a Byte[] array, it will be passed as multiple Object arguments to the vararg method.

Of course, you can verify this for yourself:

public static void sampleFunction(String name, Object... args) {
    System.out.println (args.length);
}

sampleFunction("x", new byte[] {1,2,3});
sampleFunction("x", new Byte[] {1,2,3});

The first call prints 1 , while the second call prints 3 .