castdemo1.java

来自「本人在JAVA学习中的一点小实验」· Java 代码 · 共 17 行

class Employee{}
class Manager extends Employee{
 public String toString(){
    return  "I'm a manager.";
    }
}
public class CastDemo1{
 public static void main(String args[]){
    Employee stuff;
    Manager boss=new Manager();
    stuff=boss;
    Manager myBoss;
    myBoss=(Manager)stuff;
    System.out.println(myBoss);
  }  
}