Name: dsR10051 Date: 04/28/2000


The method
public Dimension java.awt.Toolkit.getBestCursorSize(int preferredWidth, int preferredHeight)
works wrong when parameters are (0,0) or (Integer.MIN_VALUE, Integer.MIN_VALUE).
In this case it returns (0,0) dimension, but by documentation (0,0) dimension indicates that
the Toolkit implementation doesn't support custom cursors:
-----
    /**
     * Returns the supported cursor dimension which is closest to the desired
     * sizes. Systems which only support a single cursor size will return that
     * size regardless of the desired sizes. Systems which don't support custom
                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     * cursors will return a dimension of 0, 0. <p>
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...
     * @return the closest matching supported cursor size, or a dimension of 0,0 if
                                                                   ^^^^^^^^^^^^^^^^^^^
     * the Toolkit implementation doesn't support custom cursors.
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     * @since 1.2
     */

-----

Here is a minimized test:
import java.awt.*;

public class ToolkitTest01 {

    public static void main(String args[]) {

        Toolkit tk = Toolkit.getDefaultToolkit();
        Dimension d = tk.getBestCursorSize(0,0);
        if(d.width == 0 && d.height == 0) {
            System.out.println("System does not support custom cursor");
        } else {
            System.out.println(d.width + " " + d.height);
        }
        d = tk.getBestCursorSize(Integer.MIN_VALUE, Integer.MIN_VALUE);
        if(d.width == 0 && d.height == 0) {
            System.out.println("System does not support custom cursor");
        } else {
            System.out.println(d.width + " " + d.height);
        }
    }
}

Output:
%java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-B)
Java HotSpot(TM) Client VM (build 1.3.0-B, interpreted mode)
%java ToolkitTest01
System does not support custom cursor
System does not support custom cursor

======================================================================