java.awt.image.IndexColorModel#equals()源码实例Demo

private static void verifyEquals(IndexColorModel m1,
                                 IndexColorModel m2) {
    if (m1.equals(null)) {
        throw new RuntimeException("equals(null) returns true");
    }
    if (!(m1.equals(m2))) {
        throw new RuntimeException("equals() method is not working"
                + " properly");
    }
    if (!(m2.equals(m1))) {
        throw new RuntimeException("equals() method is not working"
                + " properly");
    }
    if (m1.hashCode() != m2.hashCode()) {
        throw new RuntimeException("HashCode is not same for same"
                + " IndexColorModels");
    }
}
 

private static void testSizeEquality() {
    // test with different size for cmap.
    IndexColorModel model1 = new IndexColorModel(8, 4,
            new int[] {1, 2, 3, 4},
            0, true, -1, DataBuffer.TYPE_BYTE);
    IndexColorModel model2 = new IndexColorModel(8, 3,
            new int[] {1, 2, 3},
            0, true, -1, DataBuffer.TYPE_BYTE);
    if (model1.equals(model2)) {
        throw new RuntimeException("equals() method is determining"
                + " Map size equality improperly");
    }
    if (model2.equals(model1)) {
        throw new RuntimeException("equals() method is determining"
                + " Map size equality improperly");
    }
}
 

private static void testValidPixelsEquality() {
    // test with different valid pixels.
    /*
     * In setRGBs() function of IndexColorModel we override
     * transparent_index value to map to pixel value if alpha is 0x00
     * so we should have atleast minimum alpha value to verify
     * equality of validBits thats why we have color value as
     * 16777216(2 ^ 24).
     */
    int color = 16777216;
    IndexColorModel model1 = new IndexColorModel(8, 3, new int[] {color,
            color, color}, 0, DataBuffer.TYPE_BYTE, new BigInteger("1"));
    IndexColorModel model2 = new IndexColorModel(8, 3, new int[] {color,
            color, color}, 0, DataBuffer.TYPE_BYTE, new BigInteger("2"));
    if (model1.equals(model2)) {
        throw new RuntimeException("equals() method is determining"
                + " Valid pixels equality improperly");
    }
    if (model2.equals(model1)) {
        throw new RuntimeException("equals() method is determining"
                + " Valid pixels equality improperly");
    }
}
 

private static void testColorMapEquality() {
    // test with different cmap values.
    IndexColorModel model1 = new IndexColorModel(8, 3, new int[] {1, 2, 3},
            0, true, -1, DataBuffer.TYPE_BYTE);
    IndexColorModel model2 = new IndexColorModel(8, 3, new int[] {4, 5, 6},
            0, true, -1, DataBuffer.TYPE_BYTE);
    if (model1.equals(model2)) {
        throw new RuntimeException("equals() method is determining"
                + " ColorMap equality improperly");
    }
    if (model2.equals(model1)) {
        throw new RuntimeException("equals() method is determining"
                + " ColorMap equality improperly");
    }
}
 

private static void testTransparentIndexEquality() {
    // test with different values for transparent_index.
    IndexColorModel model1 = new IndexColorModel(8, 3, new int[] {1, 2, 3},
            0, true, 1, DataBuffer.TYPE_BYTE);
    IndexColorModel model2 = new IndexColorModel(8, 3, new int[] {1, 2, 3},
            0, true, 2, DataBuffer.TYPE_BYTE);
    if (model1.equals(model2)) {
        throw new RuntimeException("equals() method is determining"
                + " TransparentIndex equality improperly");
    }
    if (model2.equals(model1)) {
        throw new RuntimeException("equals() method is determining"
                + " TransparentIndex equality improperly");
    }
}