java 对象的上转型对象(父类)

Example5_10.java

class  类人猿 {void crySpeak(String s) {System.out.println(s); }  
}
class People extends 类人猿 {void computer(int a,int b) { int c=a*b;System.out.println(c); }void crySpeak(String s) {System.out.println("***"+s+"***"); }  
}
public class Example5_10 {public static void main(String args[]) {类人猿 monkey=new People();   //monkey是People对象的上转型对象monkey.crySpeak("I love this game");People people=(People)monkey; //把上转型对象强制转化为子类的对象people.computer(10,10);}
}