java - java中仅初始化数组的某些元素

Question

所以我想跳过数组的第一个和最后一个元素来初始化。我做错了什么？

public static void main(String args[]) throws Exception {

    //Write code here
    Scanner sc = new Scanner(System.in);
    System.out.println("Input Rows: ");
    int m = sc.nextInt();
    System.out.println("Input Columns: ");
    int n = sc.nextInt();
    System.out.println("Enter values: ");
    int[][] arr = new int[m][n];

    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            if (arr[i][j] == arr[0][0] || arr[i][j] == arr[m][n]) {
                continue;
            } else {
                arr[i][j] = sc.nextInt();
            }
        }

        System.out.println();
    }
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            System.out.print(arr[i][j] + " ");
        }
        System.out.println();
    }

}

这是我的输出:

Input Rows: 
3

Input Columns:
3

Entered Values:

0 0 0 

0 0 0 

0 0 0 

Answer 1

您需要更改循环内的 if 条件，如下所示:

for (int i = 0; i < m; i++) {
    for (int j = 0; j < n; j++) {
        if ((i == 0 && j==0) || (i == m -1 && j == n -1)) {
            continue;
        } else {
            arr[i][j] = sc.nextInt();
        }
    }

    System.out.println();
}