试图让我的矩阵打印而不是堆地址 [英] Trying to get my matrix printed not the heap address

问题描述

代码似乎运行，除了我得到的不是指定（由用户）大小的矩阵，但我认为是堆地址
这是当用户为大小输入2时返回的内容然后是4个数字：

The code seems to run except what I am getting is not a matrix of a specified (by the user) size but what I think is a heap address Here's what it returns when the user inputs 2 for the size and then 4 numbers:

输入矩阵大小：
2
逐行输入2 x 2矩阵：2 3 4 5
行排序矩阵是...... [[D @ 3c954549BUILD SUCCESSFUL（总时间：8秒）

Enter matrix size: 2 Enter a 2 by 2 matrix row by row: 2 3 4 5 The row-sort matrix is...[[D@3c954549BUILD SUCCESSFUL (total time: 8 seconds)

这里是代码....提前谢谢你。

here is the code....thank you in advance.

import java.util.Scanner;
public class Exercise7_26M {

   public static void main (String[]args)


   {
           //Prompt user for input of matrix size


       System.out.println("Enter matrix size: ");
    Scanner input = new Scanner(System.in);  
    int size = input.nextInt();
    double[][] m = new double [size][size];

    //prompt user for input of array
     System.out.print("Enter a " + size + " by  " + size + " matrix row by row: ");
     for (int row = 0; row < 2; row++)
           for (int column = 0; column < 2; column++)
               m[row][column] = input.nextDouble();

               System.out.print("The row-sort matrix is..." + m);


   }

推荐答案

Java数组不会覆盖 toString（），因此您将从 Object 获取默认实现。相反，您可以使用 Arrays.deepToString（Object []） 喜欢

Java arrays do not override toString() so you are getting the default implementation from Object. Instead, you can use Arrays.deepToString(Object[]) like

System.out.println("The row-sort matrix is..." + Arrays.deepToString(m));

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