标题: java多态 向上转型向下转型 [打印本页] 作者: justinwww 时间: 2016-1-30 20:38 标题: java多态 向上转型向下转型 public class Test1_SuperMan {
public static void main(String[] args) {
// TODO Auto-generated method stub
Person p = new SuperMan();
System.out.println(p.name);
p.谈生意();
//p.fly();
SuperMan sm = (SuperMan)p;
sm.fly();
}
}
class Person {
public String name = "john";
public void 谈生意() {
System.out.println("谈生意");
}
}
class SuperMan extends Person {
public String name = "SuperMan";
public void 谈生意() {
System.out.println("超人谈大生意");
}
public void fly() {
System.out.println("飞出去救人");
}
}