java课后作业：记录创建对象数

题目描述：

 源码：

public class objectCount {
    static int cnt = 0;
    public objectCount()
    {
        cnt++;
    }
    public static void display()
    {
        System.out.println("您已经创建了"+cnt+"个对象");
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        objectCount obj1 = new objectCount();
        objectCount obj2 = new objectCount();
        objectCount obj3 = new objectCount();
        objectCount obj4 = new objectCount();
        display();
        objectCount obj5 = new objectCount();
        objectCount obj6 = new objectCount();
        objectCount obj7 = new objectCount();
        display();
        objectCount obj8 = new objectCount();
        objectCount obj9 = new objectCount();
        display();
    }

}

思路：

用静态变量计数，在构造函数中使变量累加即可。

运行结果：