Print values using multi-dimensional array in Java

Question

I try to learn about array types. Following code I used for multi dimensional array and It did't give correct result set. It gave users=[[Ljava.lang.String;@2d68be1b as output. What are the changes I need to do?

import java.util.ArrayList;

    public class Array_MultiDimentional2 {
        public static void main(String[] args) {
            String[][] users;
            String email = null;
            String name = null;
            String pass = null;
            users = new String[][] {{email, name, pass }, {"one", "two", "three"}};
            System.out.println("users=" + users);

        }
    }

If you want to store structured data (like pairs of email, name, pass) in Java, then declaring a class is recommended. It makes your code compile safe and helps to keep the code readable. — slartidan
– slartidan, Commented Mar 25, 2016 at 5:14

Community · Accepted Answer · 2020-06-20 09:12:55Z

4

Dynamic way to Print Your Array

Java has a nice utility class called Arrays which contains many handy methods for dealing with arrays. One of them is called deepToString, which is what we'll use:

import java.util.ArrayList;
import java.util.Arrays;

public class Array_MultiDimentional2 {
    public static void main(String[] args) {
        String[][] users;
        String email = null;
        String name = null;
        String pass = null;
        users = new String[][] {{"email", "name", "pass" }, {"one", "two", "three"}};
        //System.out.println("users=" + users);
        System.out.println(Arrays.deepToString(users));
    }
}

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Mar 25, 2016 at 4:56

Pritpal Singh

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Comments

LuisFMorales · Accepted Answer · 2016-03-25 04:53:09Z

1

If you want to print a multidimensional array like that, you could write some for cycles like:

for (int i=0; i<users.length; i++) {
   for (int j=0; j<users[i].length; j++) {
      System.out.println(users[i][j]);
   }
}

It is not so optimal, but it could help you.

answered Mar 25, 2016 at 4:53

LuisFMorales

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Comments

Tangoo · Accepted Answer · 2016-03-25 04:53:37Z

1

If you want to print elements in this array, how about to try this one.

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

answered Mar 25, 2016 at 4:53

Tangoo

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Comments

Yashasvi Raj Pant · Accepted Answer · 2016-03-25 05:00:04Z

1

You cannot directly print Array to get it's value(either one-dimensional or multidimensional). You have to print each value contain in the Array. For this example you can use:

for (int i=0; i<users.length; i++) {
   for (int j=0; j<users[i].length; j++) {
      System.out.println(users[i][j]);
   }
}

answered Mar 25, 2016 at 5:00

Yashasvi Raj Pant

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