一个小游戏，可以帮助大家理解对象与对象之间的交互，也就是互相调用方法。这个游戏涉及到guessgame和player两个对象。guessgame会产生介于0-9之间的随机数字，而3个player对象会猜测该数字。
类：GuessGame.class Player.class GameLauncher.class
思路：
1、GameLauncher 这个类带有main( )方法，是应用程序的入口点。
2、main( )中会创建出GuessGame对象，并调用它的startGame( )方法。
3、startGame(）方法是游戏的起点。它会创建3个Player,然后挑出要猜测的随机数字。它会要求Player猜测并检验结果，过程会被列出来。
代码如下：
class Player
{
int number = 0;//要被猜的数字
public void guess()
{
number = (int)(Math.random()*10);//随机产生player猜测的数字
System.out.println("I'm guessing "+number);
}
}
class GuessGame
{
Player p1;
Player p2;
Player p3;
public void startGame()
{
p1 = new Player();
p2 = new Player();
p3 = new Player();
int guessp1 = 0;
int guessp2 = 0;
int guessp3 = 0;
boolean p1isRight = false;
boolean p2isRight = false;
boolean p3isRight = false;
int targetNumber = (int)(Math.random()*10);
System.out.println("I'm thinking of a number between 0 and 9 ....");
while (true)
{
System.out.println("Number to guess is "+targetNumber);
p1.guess();
p2.guess();
p3.guess();
guessp1 = p1.number;
System.out.println("Player one guessed "+guessp1);
guessp2 = p2.number;
System.out.println("Player two guessed "+guessp2);
guessp3 = p3.number;
System.out.println("Player three guessed "+guessp3);
if (guessp1 == targetNumber)
{
p1isRight = true;
}
if (guessp2 == targetNumber)
{
p2isRight = true;
}
if (guessp3 == targetNumber)
{
p3isRight = true;
}
if (p1isRight||p2isRight||p3isRight)
{
System.out.println("We have a winner!");
System.out.println("Player one got it right?"+p1isRight);
System.out.println("Player two got it right?"+p2isRight);
System.out.println("Player three got it right?"+p3isRight);
System.out.println("Game is over.");
break;
}
else
{
System.out.println("No player is right!");
System.out.println("Players will have to try again");
}
}
}
}
class GameLauncher
{
public static void main(String[] args)
{
GuessGame game = new GuessGame();
game.startGame();
}
}
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