Java增强的For循环 [英] Java Enhanced For Loop

问题描述

如何使用增强的for循环编写以下for循环>

How would I write the following for loop using an enhanced for loop>

    int [] info = {1,2,3,4,5,6,7,8,9,10};

      int i;
      for (i = 0; i < info.length; i++) {
             if ((i+1) % 10 == 0)
                      System.out.println(info[i]);
             else
                      System.out.println(info[i] + ", ");
      }

我正在尝试以下操作，但我想我是不正确地这样做

I am trying the following, but i guess im doing it incorreclty

for(int i: info){
   body here///

推荐答案

您的语法正确.区别仅在于，您是将实际int值分配给 i 而不是循环索引.因此，如果您将(i + 1)％10 替换为 i％10 ，将 info [i] 替换为 i ，它将正常工作.

Your syntax is correct. The difference is only that you're assigning the actual int value to i instead of the loop index. Thus, if you replace (i+1) % 10 by i % 10 and info[i] by i, it will work correctly.

int[] info = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
for (int i : info) {
    if (i % 10 == 0)
        System.out.println(i);
    else
        System.out.println(i + ", ");
}

要了解有关增强的for循环的更多信息，请检查此Sun指南.

To learn more about the enhanced for loop, check this Sun guide.

通过三元运算符;)

int[] info = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
for (int i : info) {
    System.out.println(i + (i % 10 == 0 ? "" : ", "));
}

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