这个错误意味着break语句中缺少标签z？ [英] What is this error mean label z is missing in break statement?

问题描述

您好，在下面的代码我试图使用break和标签出来for循环，但我收到以下错误。 标签Z缺失。请帮我解释下面的代码。请注意为什么会出现此错误。

Hi in the below code i am trying to come out of for loop using break and label but i am getting the following error. Label Z is missing. Please help me the code is given below. And please mention why this error occurs.

public class Breaker {
    static String o = "";
    public static void main(String[] args) {
        z:
        o = o + 2;
        for(int x = 3; x < 8; x++) {
            if(x==4) break;
            if(x==6) break z;
            o = o + x;
        }
        System.out.println(o);
     }
 }

推荐答案

你正在收到错误，因为在你的代码标签中z：没有包含任何循环：

You are getting the error because in your code label z: is not enclosing any loop:

尝试以下代码：我刚刚在标签z之后添加了一对括号：你将不会出现任何编译错误，您的代码将运行。

Try the below code: I have just added a pair of braces after label z: you will not get any compilation error and your code will run.

public class Breaker {
    static String o = "";
    public static void main(String[] args) {
        z:
        {
        o = o + 2;
        for(int x = 3; x < 8; x++) {
            if(x==4) break;
            if(x==6) break z;
            o = o + x;
        }
        System.out.println(o);
     }
    }
 }

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