Print an array in Java

Question

I am trying to print a multidimensional array filled with *s. here is the code.

String[][] star = new String[10][10];

for(String[] row: star)
{
    Arrays.fill(row, "*");      
}

System.out.println(Arrays.toString(star)); 
// prints something like 'Ljava.lang.String;@592fa617'

But I can't seem to print out what i want...what am I doing wrong?

score 4 · Answer 1 · answered Jun 25 '14 at 03:55

4

try this

System.out.println(Arrays.deepToString(star));

answered Jun 25 '14 at 03:55

rock321987

10,942
1
30
43

score 0 · Answer 2 · answered Jun 25 '14 at 03:54

0

You can use this:

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

Arrays by default don't print content.

answered Jun 25 '14 at 03:54

Nikhil Talreja

2,754
1
14
20

Alright thanks. so does that mean I can't print the whole array at a time? Do i always have to use a loop to print each element individually? – user3773503 Jun 25 '14 at 03:58
You may use `Arrays.deepToString` as suggested by other users. I am not sure how this is internally implemented though. – Nikhil Talreja Jun 25 '14 at 04:03

score 0 · Answer 3 · answered Jun 25 '14 at 03:55

0

You should use either the Arrays.deepToString method or foreach loops.

answered Jun 25 '14 at 03:55

Bartosz Mikulski

525
3
17

score 0 · Answer 4 · answered Jun 25 '14 at 04:28

Well I can show you two ways to do it :

First Way :

        for(int i=0;i<10;i++)
        {
            System.out.println();
            for(int j=0;j<10;j++)
                System.out.print(star[i][j]+"\t");
        }

Second way :

java.util.Arrays.deepToString() which Returns a string representation of the "deep contents" of the specified array.

System.out.println(Arrays.deepToString(star));

Print an array in Java

4 Answers4