编写Java程序，定义一个3×4的二维数组，初始化的数据在程序中自定，将该二维数组元素的值正序输出、逆序输出。

Question

运行效果如下

Answer 1

public class A {

  public static void main(String[] args) {
    int a[][] = { { 11, 12, 13, 14 }, { 21, 22, 23, 23 }, { 31, 32, 33, 34 } };
    System.out.println("二维数组的正序输出:");
    for (int i = 0; i < 3; i++) {
      for (int j = 0; j < 4; j++) {
        System.out.print(a[i][j] + " ");
      }
      System.out.println();
    }
    System.out.println("二维数组的逆序输出:");
    for (int i = 2; i >= 0; i--) {
      for (int j = 3; j >= 0; j--) {
        System.out.print(a[i][j] + " ");
      }
      System.out.println();
    }
  }
}