Attack类（父类）：
public class Attack {private String name ;private int hp;private int atk;public void setName(String n){name = n;}public String getName(){return name;}public void setHp(int h){hp = h;}public int getHp(){return hp;}public void setAtk(int a){atk = a;}public int getAtk(){return atk;}}
monster类（子类）：
public class monster extends Attack{public void attacka(ultraman u){u.setHp(u.getHp() - getAtk());System.out.println(getName()+"正在攻击"+u.getName()+" "+u.getName() +"掉血"+getAtk()+"剩余血量"+u.getHp());}public void attackb(boss b){b.setHp(b.getHp() - getAtk());System.out.println(getName()+"正在攻击"+b.getName()+" "+b.getName() +"掉血"+getAtk()+"剩余血量"+b.getHp());}}
ultraman 类（子类）：
public class ultraman extends Attack {public void attackm(monster m){m.setHp(m.getHp() - getAtk());System.out.println(getName()+"正在攻击"+m.getName()+" "+m.getName() +"掉血"+getAtk()+"剩余血量"+m.getHp());}public void attackb(boss b){b.setHp(b.getHp() - getAtk());System.out.println(getName()+"正在攻击"+b.getName()+" "+b.getName() +"掉血"+getAtk()+"剩余血量"+b.getHp());}}
manage类:
public class Manage {public static void main(String[] args) {monster mo = new monster();mo.setName("小怪兽");mo.setHp(120);mo.setAtk(10);ultraman ul = new ultraman();ul.setName("奥特曼");ul.setHp(100);ul.setAtk(15);boss bo = new boss();bo.setName("boss");bo.setHp(200);bo.setAtk(20);int w = 0;for (;;) {// 实参是对象名（通过对象名调用类）mo.attacka(ul);if (ul.getHp() <= 0) {System.out.println("小怪兽赢");w = 1;break;}ul.attackm(mo);if (mo.getHp() <= 0) {System.out.println("奥特曼赢");w = 2;break;}}if (w == 1) {mo.setHp(120);while (true) {mo.attackb(bo);if (bo.getHp() <= 0) {System.out.println("小怪兽赢");break;}bo.attackm(mo);if (mo.getHp() <= 0) {System.out.println("boss赢");break;}}}if (w == 2) {ul.setHp(100);while (true) {//while(true){}与for(;;){}一样都是死循环；ul.attackb(bo);if (bo.getHp() <= 0) {System.out.println("奥特曼赢");break;}bo.attacka(ul);if (ul.getHp() <= 0) {System.out.println("boss赢");break;}}}}}
最后输出的结果如下图片所示
