Name: naC79102 Date: 07/14/99

=
java.awt.image.DirectColorModel.createCompatibleWritableRaster(int
w,int h) - The specs state that an IllegalArgumentException is thrown =
"if w or h is less than or equal to zero" whereas it is seen that this =
exception is thrown only if either w or h equal zero or if both w and h =
are less than zero. If only width or height are negetive, then it throws =
a NegetiveArraySizeException.

import java.awt.image.DirectColorModel;
import java.awt.color.ColorSpace;
import java.awt.image.WritableRaster;
import java.awt.image.DataBuffer;

public class Test {
 public Test() {
 =20
  ColorSpace cs =3D ColorSpace.getInstance(ColorSpace.CS_sRGB);
    int bits =3D 32;

    int rmask =3D 0x00ff0000;
    int gmask =3D 0x0000ff00;
    int bmask =3D 0x000000ff;
    int amask =3D 0xff000000;

    DirectColorModel dCM =3D new DirectColorModel(
      cs,32,0x00ff0000,0x0000ff00,0x000000ff,0xff000000,
      false,DataBuffer.TYPE_INT);
  WritableRaster raster =3D null;
 =20
  try {
         raster =3D dCM.createCompatibleWritableRaster(-10,-10);
  } catch (IllegalArgumentException e) {
     System.out.println("For w & h negetive got "+e);
        } catch (NegativeArraySizeException e) {
     System.out.println("For w=3D-10 h=3D-10 got "+e);
        }
       =20
        try {
         raster =3D dCM.createCompatibleWritableRaster(-10,0);
  } catch (IllegalArgumentException e) {
     System.out.println("For either w or h =3D 0 got "+e);
        } catch (NegativeArraySizeException e) {
     System.out.println("For w=3D-10 h=3D0 got "+e);
        }
       =20
        try {
         raster =3D dCM.createCompatibleWritableRaster(0,0);
  } catch (IllegalArgumentException e) {
     System.out.println("For both w & h =3D 0 got "+e);
        } catch (NegativeArraySizeException e) {
     System.out.println("For w=3D0 h=3D0 got "+e);
        }

        try {
         raster =3D dCM.createCompatibleWritableRaster(-10,10);
  } catch (IllegalArgumentException e) {
     System.out.println("For w=3D-10 h=3D10 (either one positive) got =
"+e);
        } catch (NegativeArraySizeException e) {
     System.out.println("For w=3D-10 h=3D10 (either one positive) got =
"+e);
        }
       =20
 }
=20
 public static void main(String[] args) {
  new Test();
 }
 =20

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