如何在Java中打破嵌套循环？ [英] How to 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
         }
    }
}

现在我怎样才能摆脱两个循环。我看过类似的问题，但没有人特别关注Java。我无法应用这些解决方案，因为大多数都使用了这些解决方案。

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.

我不想将内循环放在不同的方法中。

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

更新：我不想重新运行循环，当我完成循环块的执行时。

Update: I don't want to rerun the loops, when breaking I'm finished with the execution of the loop block.

推荐答案

像其他的回答者一样，我绝对更喜欢将内循环放在另一个方法中。这个答案只是说明了如何满足问题中的要求。

Like other answerers, I'd definitely prefer to put the inner loop in a different method. This answer just shows how the requirements in the question can be met.

您可以使用带有标签的 break 外循环。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

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