Question

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我想打印字符串数组的交替元素。例如，package com.javaprograms; import java.util.Arrays; public class PracticeJava { public static void main(String args[]) { String[] array = {"ABC","XYZ","PQR","STW"}; //int num = array.length; for(int i=0;i<=array.length-1;i++) { System.out.println(Arrays.asList(array)); } } }或{"ABC", "PQR"}。上面的代码不起作用。

Answer 1

为什么不循环进入整个数组并获取奇数或偶数元素然后打印出来？ e.g。

for (int i = 0; i <= array.length - 1; i++) {
   if (i % 2 == 0) // all even or "if (i % 2 != 0)" all odd
      System.out.println(array[i]);
}

Answer 2

在每个循环中增加2个循环变量：

打印所有偶数元素：

for (int i = 0; i < array.length; i = i + 2) {
    System.out.println(array[i]);
}
// Will print "ABC", "PQR"

打印所有奇数元素：

for (int i = 1; i < array.length; i = i + 2) {
    System.out.println(array[i]);
}
// Will print "XYZ", "STW"

打印字符串数组的交替元素

2 个答案: