Constructor for java.awt.image.AreaAveragingScaleFilter class throws IllegalArgumentException when passed a zero value for a input parameter. Such behavior is not specified either in the member spec or in the package/class description.

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import java.awt.image.AreaAveragingScaleFilter;

public class Test1 {
    public static void main(String[] args) {
        int[] values = { 1, -1, Integer.MAX_VALUE, Integer.MIN_VALUE,
                         29, 180, -32, -439 };
        StubFilter filter = null;
        for (int i = 0; i < values.length; i++) {
            try {
                filter = new StubFilter(0, values[i]);
                System.out.println("result: false");
            } catch (IllegalArgumentException e) {
                System.out.println("result (iae): true");
            }
        }
    }

    public static class StubFilter extends AreaAveragingScaleFilter {

        public StubFilter(int width, int height) {
            super(width, height);
        }

        public int getSrcWidth() {
            return srcWidth;
        }

        public int getSrcHeight() {
            return srcHeight;
        }

        public int getDestWidth() {
            return destWidth;
        }

        public int getDestHeight() {
            return destHeight;
        }
    }
}

###@###.### 2004-12-21 14:42:51 GMT