备忘录模式

public class Memoto {

    public int lifeValue ;
    public String weapon;
    public int guanka;


    @Override
    public String toString() {
        return "武器   "+weapon+"    关卡    "+guanka+"   生命   "+lifeValue;
    }

}

public class CareTaker {

    Memoto memo;

    public void archive(Memoto memo){
        this.memo=memo;
    }

    public Memo getMemo(){
        return memo;
    }

}

public class Game {

    private int lifeValue = 100;
    private String weapon = "dao";
    private int guanka = 10;


    public void play(){
        System.out.println("玩游戏"+"第"+guanka+"关");
        lifeValue-=10;
        guanka++;
        System.out.println("进入"+"第"+guanka+"关");
    }

    public void quit(){
        System.out.println("-----");
        System.out.println("推出前的游戏属性"+this.toString());
        System.out.println("退出游戏");
        System.out.println("-----");
    }

    @Override
    public String toString() {
        return "武器   "+weapon+"    关卡    "+guanka+"   生命   "+lifeValue;
    }

    public Memoto createMemo(){

        Memoto memo = new Memoto();
        memo.lifeValue = this.lifeValue;
        memo.weapon=this.weapon;
        memo.guanka=this.guanka;
        return memo;
    }

    public void restore(Memo memo){
        this.lifeValue=memo.lifeValue;
        this.guanka=memo.guanka;
        this.weapon=memo.weapon;
        System.out.println("恢复后的游戏属性"+this.toString());
    }

}

public static void main(String[] args) {
		Game game = new Game();
		//打游戏
		game.play();
		//存档
		MemoTaker memoTaker =  new MemoTaker();
		memoTaker.archive(game.createMemo());
		//退出游戏
		game.quit();
		//恢复游戏
		Game game2 = new Game();
		game2.restore(memoTaker.getMemo());

	}