According to the spec for Toolkit.isFrameStateSupported(int state):
Throws:
    HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

But when running the following code in Headless environment, the method doesn't throw HeadlessException:

=======================================================================
import java.awt.*;
public class MyHeadlessTest {
    public void case1() {
        try {
            Toolkit.getDefaultToolkit().isFrameStateSupported(Frame.ICONIFIED);
        } catch (HeadlessException e) {
            if (GraphicsEnvironment.isHeadless()) {
                System.out.println("OKAY: headless thrown correctly");
                return;
            } else {
                System.out.println("headless thrown incorrectly");
                return;
            }
        }
        if (GraphicsEnvironment.isHeadless()) {
            System.out.println("Failed: HeadlessException is not thrown in Headless environment");
            return;
        }
        System.out.println("OKAY");
    }
    public static void main(String[] args) {
        MyHeadlessTest t = new MyHeadlessTest();
        t.case1();
    }
}
=======================================================================

I was running the code with the following command on Solaris:
java -Djava.awt.headless=true MyHeadlessTest

And the result of running the above code is:
Failed: HeadlessException is not thrown in Headless environment

Problem happens on both the Solaris and Linux, and on both the J2SE 1.4.2 and J2SE 1.5.



###@###.### 2005-05-19 22:19:19 GMT