能够在Java存储方法数组？ [英] Can Java store methods in arrays?

问题描述

好吧，我写了一些code和所有我做的是循环的，但我叫更换哪种方法。我试图用一个for循环，以便它会有点整洁（和出于好奇，看看它是否可以做），但是当我这样做，这样它不会编译，因为它不承认在一个项目数组作为一种方法，我想。这是我有：

Well I wrote some code and all I was doing was for loops, but changing which method I called. I tried using a for loop so it'd be a bit neater (and out of curiosity to see if it could be done), but it doesn't compile when I do it this way, because it doesn't recognize an item in an array as a method, I think. This is what I have:

String[] moveArray = {moveRight,moveDown,moveLeft,moveUp};
for (i = 0; i < 4; i++) {
    while (myWumpus.moveArray[i]) {
        myWumpus.moveArray[i];
        generator.updateDisplay();
    }
}

当我尝试编译我收到

not a statement myWumpus.moveArray[i]();
';' expected myWumpus.moveArray[i]();

（它指的是在while循环的第一个语句）

(It refers to the first statement in the while loop)

所以，我认为这是可能是因为我让它成为一个String类型的数组？有没有一种方法类型？这是在所有可能的？任何解决方案，欢迎:)。另外，我可以得到它使用4 while循环，所以你不必告诉我，解决工作。谢谢！

So, I think it's maybe because I'm making it an Array of type String? Is there a type Method? Is this at all possible? Any solutions welcome :). Also, I can get it to work using 4 while loops, so you don't need to show me that solution. Thanks!

推荐答案

您不能储存方法直接在阵列。然而，你可以存储对象，不同的方式实现了同样的方法。例如：

You cannot store methods directly in arrays. However you can store objects, which implement the same method differently. For example:

Mover[] moveArray = {new RightMover(), new DownMover() new LeftMover(), new UpMover() };
for (i = 0; i < 4; i++) {
    while (myWumpus.moveArray[i]) {
        moveArray[i].move();
        generator.updateDisplay();
    }
}

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