day6_work1_fingerguessGame

项目需求:人机猜拳游戏

类图

代码:

Player类

package org.zzz1.www;
public class Player {
	protected String name;
	private int flag;

	{
		name = "未命名";
		flag = 0;
	}

	protected String importName() {
		return getName();
	}

	protected int fingerGuess() {
		int finger;
		do{
			System.out.println("输入1-3之间的数!");
		 	finger= Game.input.nextInt();
		}while(!(finger > 0 && finger < 4) );

		switch (finger){
			case 1:
				System.out.println(this.name+"出了剪刀");
				break;
			case 2:
				System.out.println(this.name+"出了石头");
				break;
			case 3:
				System.out.println(this.name+"出了布");
				break;
			default:
		}// switch
		return finger;
	}//fingerGuess

	protected void setFlag() {
		this.flag++;
	}

	protected int getFlag() {
		return flag;
	}

	protected void setName(String name) {
		this.name = name;
	}

	protected String getName() {
		return name;
	}

}

Computer类

package org.zzz1.www;
import java.util.Random;

public class Computer extends Player {
	public Computer(){
		name = "简单人机";
	}

	@Override
	protected int fingerGuess() {
		int finger;
		Random random = new Random();
		System.out.print(this.name + "出了");
		finger = random.nextInt(3) + 1;
		switch (finger){
			case 1:
				System.out.println("剪刀");
				break;
			case 2:
				System.out.println("石头");
				break;
			case 3:
				System.out.println("布");
				break;
			default:
		}// switch
		return finger;
	}// fingerGuess
}

Person类

package org.zzz1.www;

public class Person extends Player {

}

Judge类

package org.zzz1.www;
public class Judge {

	public void welcome() {
		System.out.println("欢迎来到猜拳游戏\n游戏规则:输入1,2,3分别代表剪刀,石头,布,与电脑进行对决,五局三胜");
	}

	public void askName(Player person) {
		if(person instanceof Person) {

			System.out.println("请输入用户名");
			person.setName(Game.input.next());
		}
	}

	public void startGame(Player person, Player computer){
		int personPlay;
		int computerPlay;
		System.out.println(person.importName() + "与" + computer.importName() + "猜拳正式开始");
		for(int i = 0; i < 5; i++) {
			System.out.println("第"+ (i+1) + "局" + person.importName() + "要出什么?1.剪刀 2.石头 3.布");
			personPlay = person.fingerGuess();
			computerPlay = computer.fingerGuess();
			if ((personPlay == 1 && computerPlay == 3) || (personPlay == 2 && computerPlay == 1) || (personPlay == 3 && computerPlay == 2)) {
				System.out.println(person.importName() + "获胜");
				person.setFlag();
			} else if ((computerPlay == 1 && personPlay == 3) || (computerPlay == 2 && personPlay == 1) || (computerPlay == 3 && personPlay == 2)) {
				System.out.println(computer.importName() + "获胜");
				computer.setFlag();
			} else {
				System.out.println("平局");
			}

		}// for

	}// startGame

	public void judged(Player person,Player computer){
		if(person.getFlag() < computer.getFlag()){
			System.out.println(computer.importName() + "恭喜你获得游戏胜利");
		}else if(person.getFlag() > computer.getFlag()) {
			System.out.println(person.importName() + "恭喜你获得游戏胜利");
		}else{
			System.out.println("太巧了,竟然平局");
		}
	}

}// class

Game类

package org.zzz1.www;
import java.util.Scanner;

public class Game {
	public static Scanner input = new Scanner(System.in);
	public static void main(String[] args) {
		Judge judge1 = new Judge();
		Player person = new Person();
		Player computer = new Computer();
		judge1.welcome();
		judge1.askName(person);
		judge1.startGame(person,computer);
		judge1.judged(person,computer);
		input.close();
	}
}

运行结果

tips:

1.Scanner:

sc.close()一旦调用则就算再次创建Scanner（System.in）对象也无法继续输入，所以要慎用close()方法。

解决方案：在本文件的public类中（意即整个程序的入口）创建Scanner对象（需加上public static修饰），并在main方法中调用close()方法关闭输入流。然后在其他类中需要输入时使用：主类名.sc.next() 即可。