是否可以从 Java 中的方法返回多个值?

Is it possible to return more than one value from a method in Java?(是否可以从 Java 中的方法返回多个值?)

问题描述

我正在使用模拟器玩掷骰子，我试图从同一个方法返回两个值(或者更确切地说，我愿意).

I am using a simulator to play craps and I am trying to return two values from the same method (or rather I would like to).

当我写我的退货声明时，我只是试着把&"编译并正常运行；但我无法访问第二个返回值.

When I wrote my return statement I simply tried putting "&" which compiled and runs properly; but I have no way of accessing the second returned value.

public static int crapsGame(){
  int myPoint;
  int gameStatus = rollagain;
  int d1,d2;
  int rolls=1;

  d1 = rollDice();
  d2 = rollDice();
  switch ( d1+d2 ) {
    case 7: 
    case 11:
      gameStatus = win;
      break;
    case 2: 
    case 3: 
    case 12:
      gameStatus = loss;
      break;
    default:
      myPoint = d1+d2;
      do {
        d1=rollDice();
        d2=rollDice();
        rolls++;
        if ( d1+d2 == myPoint )
          gameStatus = win;
        else if ( d1+d2 == 7 )
          gameStatus = loss;
       } while (gameStatus == rollagain);
  } // end of switch
  return gameStatus & rolls;
}

当我将值返回为:

gameStatus=crapsGame();

它适当地将变量设置为赢或输，但如果我尝试像以下语句一样简单的事情:

It appropriately sets the varaible to win or lose but if I try something as simple as following that statement with:

rolls=crapsGame();

它被赋予与游戏状态相同的值...一个 0 或一个 1(赢或输).有什么方法可以访问第二个返回值?还是有完全不同的方法?

It is assigned the same value as gamestatus...a 0 or a 1 (win or lose). Any way that I can access the second returned value? Or is there a completely different way to go about it?

推荐答案

创建自己的值持有者对象来保存这两个值，然后返回它.

Create your own value holder object to hold both values, then return it.

return new ValueHolder(gameStatus, rolls);

可以返回一个包含多个值的数组，但这很神秘，而且对可读性没有任何帮助.更容易理解这意味着什么......

It's possible to return an array with multiple values, but that's cryptic and it does nothing for readability. It's much easier to understand what this means...

valueHolder.getGameStatus()

比这意味着什么.

intArray[0]

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