shapetester2.java

Java与面向对象程序设计实验教学讲义.复数类的实现,复数类的复杂运算,身份证号码的分析,图形界面设计

public class ShapeTester2
{
    public static void main(String args[]) {
        Circle    x;
        Rectangle y;
        x = new Circle();
        y = new Rectangle();
        System.out.println(x + "   " + y);
    }
}