Align printf output in Java

Question

I need to display a list of items with their prices from an array and would like to align the prices  I almost have it working but needs improvements  Below is the code and the output  Any ideas how to make all prices aligned  So far some work but some don t  Thanks in advance     for loop System out printf   d   s  t t    2f n                   i   1  BOOK TYPE i   COST i      output   1  Newspaper          1 00 2  Paper Back         7 50 3  Hardcover book         10 00 4  Electronic book        2 00 5  Magazine           3 00

User · Answer

A simple solution that springs to mind is to have a String block of spaces:

String indent = "                  "; // 20 spaces.

When printing out a string, compute the actual indent and add it to the end:

String output = "Newspaper";
output += indent.substring(0, indent.length - output.length);

This will mediate the number of spaces to the string, and put them all in the same column.

User · Answer

You can refer to this blog for printing formatted coloured text on console  https   javaforqa wordpress com java-print-coloured-table-on-console   public class ColourConsoleDemo            param args       033 0m BLACK  will colour the whole line       033 37m WHITE 033 0m  will colour only WHITE    For colour while Opening -- gt    033 37m  and closing -- gt    033 0m         public static void main String   args       TODO code application logic here System out println   033 0m BLACK    System out println   033 31m RED    System out println   033 32m GREEN    System out println   033 33m YELLOW    System out println   033 34m BLUE    System out println   033 35m MAGENTA    System out println   033 36m CYAN    System out println   033 37m WHITE 033 0m       printing the results String leftAlignFormat       -20s    -7d    -7d    -7d   n    System out format   ---------Test Cases with Steps Summary -------------  n    System out format   ---------------------- --------- --------- ---------  n    System out format    Test Cases            Passed    Failed    Skipped    n    System out format   ---------------------- --------- --------- ---------  n     String formattedMessage    TEST 01  trim     leftAlignFormat       -20s    -7d    -7d    -7d   n   System out print   033 31m       Open print red System out printf leftAlignFormat  formattedMessage  2  1  0   System out print   033 0m       Close print red System out format   ---------------------- --------- --------- ---------  n

User · Answer

Format specifications for printf and printf-like methods take an optional width parameter   System out printf    10d   25s   25 2f n                      i   1  BOOK TYPE i   COST i       Adjust widths to desired values

User · Answer

Here s a potential solution that will set the width of the bookType column  i e  format of the bookTypes value  based on the longest bookTypes value   public class Test       public static void main String   args            String   bookTypes      Newspaper    Paper Back    Hardcover book    Electronic book    Magazine             double   costs     1 0  7 5  10 0  2 0  3 0                Find length of longest bookTypes value          int maxLengthItem   0          boolean firstValue   true          for  String bookType   bookTypes                maxLengthItem    firstValue    bookType length     Math max maxLengthItem  bookType length                 firstValue   false                        Display rows of data         for  int i   0  i  lt  bookTypes length  i                     Use  6 2 instead of   2 so that decimals line up  assuming max                book cost of  999 99  Change 6 to a different number if max cost                is different             String format     d   -    Integer toString maxLengthItem     s  t t   9 2f n               System out printf format  i   1  bookTypes i   costs i

User · Answer

You can try the below example  Do use  -  before the width to ensure left indentation  By default they will be right indented  which may not suit your purpose   System out printf   2d   -20s    2f n    i   1  BOOK TYPE i   COST i      Format String Syntax  http   docs oracle com javase 7 docs api java util Formatter html syntax  Formatting Numeric Print Output  https   docs oracle com javase tutorial java data numberformat html  PS  This could go as a comment to DwB s answer  but i still don t have permissions to comment and so answering it

[java] Align printf output in Java

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