Java - Best way to print 2D array

Question

I was wondering what the best way of printing a 2D array was  This is some code that I have and I was just wondering if this is good practice or not  Also correct me in any other mistakes I made in this code if you find any  Thanks   int rows   5  int columns   3   int     array   new int rows  columns    for int i   0  i lt rows  i        for int j   0  j lt columns  j            array i  j    0   for int i   0  i lt rows  i          for int j   0  j lt columns  j                  System out print array i  j              System out println

User · Answer

You can print in simple way   Use below to print 2D array  int     array   new int rows  columns   System out println Arrays deepToString array      Use below to print 1D array  int   array   new int size   System out println Arrays toString array

User · Answer

Try this   for  char   temp   box        System err println Arrays toString temp  replaceAll           replaceAll

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From Oracle Offical Java 8 Doc   public static String deepToString Object   a      Returns a string representation of the  deep contents  of the   specified array  If the array contains other arrays as elements  the   string representation contains their contents and so on  This method   is designed for converting multidimensional arrays to strings

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I would prefer generally foreach when I don t need making arithmetic operations with their indices   for  int   x   array       for  int y   x               System out print y                 System out println

User · Answer

There is nothing wrong with what you have  Double-nested for loops should be easily digested by anyone reading your code    That said  the following formulation is denser and more idiomatic java  I d suggest poking around some of the static utility classes like Arrays and Collections sooner than later  Tons of boilerplate can be shaved off by their efficient use   for  int   row   array        Arrays fill row  0       System out println Arrays toString row

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class MultidimensionalArray       public static void main String   args                create a 2d array         int     a                      1  -2  3                    -4  -5  6  9                    7                          first for   each loop access the individual array            inside the 2d array         for  int   innerArray  a                   second for   each loop access each element inside the row             for int data  innerArray                    System out println data                                    You can do it like this for 2D array

User · Answer

Simple and clean way to print a 2D array    System out println Arrays deepToString array  replace           n   replace            replace

User · Answer

Two-liner with new line   for int   x  matrix              System out println Arrays toString x      One liner without new line   System out println Arrays deepToString matrix

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System out println Arrays deepToString array                            replace        n   replace       t                               replaceAll                      You can remove unwanted brackets with  replace    after  deepToString if you like   That will look like    1     2     3  4     5     6  7     8     9  10    11    12  13    15    15

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Adapting from https   stackoverflow com a 49428678 1527469  to add indexes   System out print  quot   quot    for  int row   0  row  lt  array 0  length  row          System out print  quot  t quot    row      System out println    for  int row   0  row  lt  array length  row          for  int col   0  col  lt  array row  length  col              if  col  lt  1                System out print row               System out print  quot  t quot    array row  col              else                System out print  quot  t quot    array row  col                        System out println

User · Answer

1 2 3   4 5 6     Use the code below to print the values   System out println Arrays deepToString       Output will look like this  the whole matrix in one line      1 2 3   4 5 6

User · Answer

That s the best I guess          for  int   row   matrix       System out println Arrays toString row

User · Answer

Ashika s answer works fantastically if you want  0 0  to be represented in the top  left corner  per normal CS convention   If however you would prefer to use normal mathematical convention and put  0 0  in the lower left hand corner  you could use this   LinkedList lt String gt  printList   new LinkedList lt String gt     for  char   row  array        printList addFirst Arrays toString row       while   printList isEmpty        System out println printList removeFirst       This used LIFO  Last In First Out  to reverse the order at print time

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With Java 8 using Streams and ForEach      Arrays stream array  forEach  i  - gt            Arrays stream i  forEach  j  - gt  System out print j    quot   quot             System out println             The first forEach acts as outer loop while the next as inner loop

[java] Java - Best way to print 2D array?

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