1. 概述
在这个简短的教程中,我们将了解如何在Java创建一个简单的“石头剪刀布”游戏。
2. 创建我们的“石头剪刀布”游戏
我们的游戏将允许玩家输入“rock”、“paper”或“scissors”作为每个动作的值。
首先,我们为这三种情况创建一个枚举:
enum Move {
ROCK("rock"),
PAPER("paper"),
SCISSORS("scissors");
private String value;
// ...
}
然后,让我们创建一个生成随机整数并返回计算机动作的方法:
private static String getComputerMove() {
Random random = new Random();
int randomNumber = random.nextInt(3);
String computerMove = Move.values()[randomNumber].getValue();
System.out.println("Computer move: " + computerMove);
return computerMove;
}
以及一种检查玩家是否获胜的方法:
private static boolean isPlayerWin(String playerMove, String computerMove) {
return playerMove.equals(Move.ROCK.value) && computerMove.equals(Move.SCISSORS.value)
|| (playerMove.equals(Move.SCISSORS.value) && computerMove.equals(Move.PAPER.value))
|| (playerMove.equals(Move.PAPER.value) && computerMove.equals(Move.ROCK.value));
}
最后,我们使用这些方法来组成一个完整的程序:
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int wins = 0;
int losses = 0;
System.out.println("Welcome to Rock-Paper-Scissors! Please enter \"rock\", \"paper\", \"scissors\", or \"quit\" to exit.");
while (true) {
System.out.println("-------------------------");
System.out.print("Enter your move: ");
String playerMove = scanner.nextLine();
if (playerMove.equals("quit")) {
System.out.println("You won " + wins + " times and lost " + losses + " times.");
System.out.println("Thanks for playing! See you again.");
break;
}
if (Arrays.stream(Move.values()).noneMatch(x -> x.getValue().equals(playerMove))) {
System.out.println("Your move isn't valid!");
continue;
}
String computerMove = getComputerMove();
if (playerMove.equals(computerMove)) {
System.out.println("It's a tie!");
} else if (isPlayerWin(playerMove, computerMove)) {
System.out.println("You won!");
wins++;
} else {
System.out.println("You lost!");
losses++;
}
}
}
如上所示,我们使用Java的Scanner类来读取用户输入值。
现在我们可以运行该程序然后试着玩两局:
Welcome to Rock-Paper-Scissors! Please enter "rock", "paper", "scissors", or "quit" to exit.
-------------------------
Enter your move: rock
Computer move: scissors
You won!
-------------------------
Enter your move: paper
Computer move: paper
It's a tie!
-------------------------
Enter your move: quit
You won 1 times and lost 0 times.
Thanks for playing! See you again.
3. 总结
在这个快速教程中,我们学习了如何用Java创建一个简单的“石头剪刀布”游戏。
与往常一样,本教程的完整源代码可在GitHub上获得。
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