Re: arrays and cloning, where is it described?

Daniel Pitts <>
Thu, 06 Mar 2008 10:24:56 -0800
Mike Schilling wrote:

"Patricia Shanahan" <> wrote in message

Andreas Leitgeb wrote:

Mike Schilling <> wrote:


In what ways are arrays not objects?

Don't know, if that's what Daniel meant, but arrays are not
accessed through get-/putfield (except for length) or invoke...
opcodes, but through <x>aload/<x>astore opcodes for <x> any
of [abcdfils].

That is an implementation detail in compilers that target bytecode, not
a Java language feature.

What Patricia said.

All of the array types (i.e. array of X) are subclasses [1] of Object; to
me, that says that arrays are objects.

1. Descendents, anyway. Do we know for a fact that their immediate
superclass is Object?

public class Foo {
     public static void main(String[] args) {
         System.out.println("Class: " + args.getClass());
         System.out.println("Super: " + args.getClass().getSuperclass());
         final List<? extends Class<?>> interfaces =
         System.out.println("Interfaces: " + interfaces);
         final List<Field> fields =
         System.out.println("Fields:" + fields);
         final List<Field> declaredFields =
         System.out.println("Declared Fields:" + declaredFields);


Class: class [Ljava.lang.String;
Super: class java.lang.Object
Interfaces: [interface java.lang.Cloneable, interface]
Declared Fields:[]

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