【Java入门杂记】【五】

• 类、属性、方法
• • 方法
  • • public
    • private
    • 返回值
    • 返回值练习
• 属性、方法、返回值练习
• • 分析

public void 方法名(){
			方法体
}

//void：无返回
方法是一个行为，需要返回/无返回

arr+if+return
//注意运算类型

if+return

//Person.java

package test03;

import java.util.Scanner;

public class Person {
	public String name;
	public int score;
	
	Scanner input = new Scanner(System.in);
	//出拳方法
	public int showFist() {
		int fist = 0;
		while(true) {
			//控制台输入
			System.out.println("请出拳：1.石头   2.剪刀  3.布");
			
			fist = input.nextInt();
			
			if(fist == 1) {
				System.out.println(name + "出拳：石头");
				break;
			}else if(fist == 2) {
				System.out.println(name + "出拳：剪刀");
				break;
			}else if(fist == 3) {
				System.out.println(name + "出拳：布");
				break;
			}else {
				System.out.println("输入错误，重输！");
			}
		}
		return fist;
	}
}

//Computer.java

package test03;

public class Computer {
	public String name;
	public int score;
	
	public int showFist() {
		int fist = (int)(Math.random() * 3 + 1);
		if(fist == 1) {
			System.out.println(name + "出拳：石头");
		}else if(fist == 2) {
			System.out.println(name + "出拳：剪刀");
		}else if(fist == 3) {
			System.out.println(name + "出拳：布");
		}else {
			System.out.println("请重输");
		}
		return fist;
	}
}

//Manager.java

package test03;

import java.util.Scanner;

public class Manager {
	
	Scanner input = new Scanner(System.in);
	
	Person per = new Person();        //?
	Computer com = new Computer();
	//让谁出拳
	
	int perFist = 0;
	int comFist = 0;
	//临时存储
	
	//初始化方法
	public void init() {
		System.out.println("****************************");
		System.out.println("**********人机猜拳比赛*******");
		System.out.println("****************************");
		
		System.out.println("请输入你的名字：");
		per.name = input.next();
		
		while(true) {
			System.out.println("请输入你的对手：1.张三   2.李四  3.王五");
			int result = input.nextInt();
			
			if(result == 1) {
				com.name = "张三";
				break;
			}else if(result == 2) {
				com.name = "李四";
				break;
			}else if(result == 3) {
				com.name = "王五";
				break;
			}else {
				System.out.println("输入错误，重新输入！");
			}
		}
		
		System.out.println(per.name + "    VS    " + com.name);
		start();
	}
	
	//开始比赛
	public void start() {
		String choice = "y";
		while(choice.equals("y")) {
			perFist = per.showFist();
			comFist = com.showFist();
				
			chack();
			
			System.out.println("是否继续？(y/n)");
			choice = input.next();
		}
		showResult();
	}
	
	//判定每局结果
	public void chack() {
		if(perFist ==1 && comFist == 2 || perFist == 2 && comFist == 3 || perFist == 3 && comFist == 1) {
			System.out.println("恭喜你赢了一局");
		per.score ++;
		}else if(perFist == comFist) {
			System.out.println("平局");
		}else {
			System.out.println("很遗憾，" + com.name + "输了一局");
			com.score++;
		}
}
	
	//宣布比赛结果
	public void showResult() {
		System.out.println("****************************");
		System.out.println(per.name + "" + per.score);
		System.out.println(per.name + "" + per.score);
		
		if(per.score > com.score) {
			System.out.println("恭喜你赢得了最终的胜利");
		}else if(per.score == com.score) {
			System.out.println("两位选手不相上下");
		}else {
			System.out.println("很遗憾" + com.name + "赢得了最终的胜利");
		}
		System.out.println("****************************");
	}
}

//Test.java

package test03;

public class Test {
	public static void main(String[] args) {
		
//		Person per = new Person();
//		int fist = per.showFist();
//		System.out.println(fist);
		
//		Computer com = new Computer();
//		int fist = com.showFist();
//		System.out.println(fist);	
		
		Manager mgr = new Manager();
		mgr.init();
	}
}