What are variables without public, private or protected declared as?

Question

If instead of:

private JButton theButton;

I define a field like this:

JButton theButton;

What is the differen

Answer 1

In Java there are public, protected, package (default), and private visibilities; ordered from most visible to the least.

If you do not specify it, by default the visibility is package.

package mytest.myvisibility;

public class MyClass
{
    public int myPublicInt; // visible to all
    protected myProtectedInt; // visible to subclasses of MyClass and to other members of the mytest.myvisibility package
    int myPackageInt; // visible only to other members of the mytest.myvisibility package
    private int myPrivateInt; // visible only to MyClass objects
}