如何打破 Java 中的嵌套循环? [英] How do I break out of nested loops in Java?

问题描述

我有一个这样的嵌套循环结构:

I've got a nested loop construct like this:

for (Type type : types) {
    for (Type t : types2) {
         if (some condition) {
             // Do something and break...
             break; // Breaks out of the inner loop
         }
    }
}

现在我怎样才能跳出这两个循环?我看过类似的问题，但没有一个专门涉及 Java.我无法应用这些解决方案，因为大多数使用 goto.

Now how can I break out of both loops? I've looked at similar questions, but none concerns Java specifically. I couldn't apply these solutions because most used gotos.

我不想将内部循环置于不同的方法中.

I don't want to put the inner loop in a different method.

我不想重新运行循环.中断时，我完成了循环块的执行.

I don't want to rerun the loops. When breaking I'm finished with the execution of the loop block.

推荐答案

像其他回答者一样，我绝对更喜欢将循环放在不同的方法中，此时您可以返回到完全停止迭代.此答案仅说明如何满足问题中的要求.

Like other answerers, I'd definitely prefer to put the loops in a different method, at which point you can just return to stop iterating completely. This answer just shows how the requirements in the question can be met.

您可以将 break 与外循环的标签一起使用.例如:

You can use break with a label for the outer loop. For example:

public class Test {
    public static void main(String[] args) {
        outerloop:
        for (int i=0; i < 5; i++) {
            for (int j=0; j < 5; j++) {
                if (i * j > 6) {
                    System.out.println("Breaking");
                    break outerloop;
                }
                System.out.println(i + " " + j);
            }
        }
        System.out.println("Done");
    }
}

打印:

0 0
0 1
0 2
0 3
0 4
1 0
1 1
1 2
1 3
1 4
2 0
2 1
2 2
2 3
Breaking
Done

这篇关于如何打破 Java 中的嵌套循环?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！