Question

声明一个矩形类Rectangle，其中有多个构造方法。用不同的构造方法创建对象，并输出矩形的周长和面积。

Answer 1

Rectangle r[] = new Rectangle[6];
r[0] = new Rectangle();
r[1] = new Rectangle(new Dimension(10,10));
r[2] = new Rectangle(10,10);
r[3] = new Rectangle(10,10, 100, 2);
r[4] = new Rectangle(new Point(4,5));
r[5] = new Rectangle(new Point(4,5), new Dimension(10,10));
r[6] = new Rectangle(r[4]);

for (int i=0;i<r.length;i++)
System.out.println("Area["+i+"]=" + r[i].height * r[i].width + "\n" + "Length["+i+"]=" + 2 * ( r[i].height + r[i].width ));