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  • java break和continue 新技能

    之前写多重循环时,想跳出到最外层时,我们都知道,这个break和continue就很“鸡肋”啊,所以,就有了这样的清新脱俗的写法:

    for (int i = 0; i < 10; i++) {
        boolean breakFor = false;
        for (int j = 0; j < 10; j++) {if (j == 3) {
                breakFor = true;
                break;
            }
        }
        if (breakFor) {
            break;
        }
    }
                    

    比较直接暴力了,每层都有个接盘侠啊这是,这要是层数多点,你要累死我咋的,

    直达有一天,当我看到她的第一眼,就知道,爱了爱了

    label_i:
    for (int i = 0; i < 10; i++) {
        label_j:
        for (int j = 0; j < 10; j++) {
            for (int k = 0; k < 10; k++) {
                System.out.println("i = " + i + ", j = " +  j + ", k = " + k);
                if (k == 2) {
                    continue label_j;
                }
                if (j == 2) {
                    break label_j;
                }
                if (i == 2) {
                    break label_i;
                }
            }
        }
    }

    如此优雅大方,输出也很直观:

    i = 0, j = 0, k = 0
    i = 0, j = 0, k = 1
    i = 0, j = 0, k = 2
    i = 0, j = 1, k = 0
    i = 0, j = 1, k = 1
    i = 0, j = 1, k = 2
    i = 0, j = 2, k = 0
    i = 1, j = 0, k = 0
    i = 1, j = 0, k = 1
    i = 1, j = 0, k = 2
    i = 1, j = 1, k = 0
    i = 1, j = 1, k = 1
    i = 1, j = 1, k = 2
    i = 1, j = 2, k = 0
    i = 2, j = 0, k = 0
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  • 原文地址:https://www.cnblogs.com/dpcn/p/12053781.html
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