illegalrectangleexception.java

此程序可实现：在可视化界面中随即生成一些图形（长方形、椭圆、圆、正方形）；程序会自动告诉你所生成的图形的形状并计算这些图形的面积；最后程序会自动统计各个图形的分布。

public class IllegalRectangleException extends Exception {

	/**
	 * A class extends Exception.
	 * @author Ruixiao Wu.
	 * @version 1.0 26/06/2006.
	 */
	private static final long serialVersionUID = 1L;
	/**
	 * A method to check whether it is a square and throws the Exception.
	 */
	public void check(int length, int weigth) throws Exception {
		try {
			if (length == weigth)
				throw new IllegalRectangleException();
		} catch (IllegalRectangleException e) {			
		}
	}
}