java - 二维数组，输出不正确

Question

import java.util.Scanner;

public class Maze {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        int rows = 0;
        int cols = 0;
        String arrayLine = "";
        int counter = 0;

        rows = sc.nextInt();
        cols = sc.nextInt();
        arrayLine = sc.next();

        char[][] array = new char[rows][cols];

        for(int r=0; r<rows; r++){
            for (int c=0; c<cols; c++){
                array[r][c] = arrayLine.charAt(counter);
                counter ++;
            }
        }

        System.out.println(array);
        System.out.println();
    }
}

---

我从中引入信息的文档是:

8
7
000000011111S0000000110101111010101100010110111011010E00

---

我运行它时得到的输出是 [[C@252f0999

请帮忙，我才刚刚开始学习java!

Answer 1

array 是一种特殊的对象，它没有隐式的 toString() 来管理数组内容的 pretty-print ，发生的事情是该对象由对象的标准表示表示，即它的哈希码。

你应该使用 Arrays.toString() :

for (int i = 0; i < array.length; ++i)
  System.out.println(Arrays.toString(array[i]));

请注意，您不能直接编写 Arrays.toString(array) 因为，如文档中所述:

If the array contains other arrays as elements, they are converted to strings by the Object.toString() method inherited from Object, which describes their identities rather than their contents.