Java output formatting for Strings

Question

I was wondering if someone can show me how to use the format method for Java Strings  For instance If I want the width of all my output to be the same  For instance  Suppose I always want my output to be the same  Name                Bob Age                 27 Occupation          Student Status              Single   In this example  all the output are neatly formatted under each other  How would I accomplish this with the format method

User · Answer

Override      public String toString               return String format   15s  n  15d  n  15s  n  15s   name  age  Occupation  status

User · Answer

If you want a minimum of 4 characters  for instance   System out println String format   4d   5       Results in     5   minimum of 4 characters

User · Answer

System out println String format   -20s   s     label    content         Where  s is a placeholder for you string  The  -  makes the result left-justified  20 is the width of the first string   The output looks like this   label                 content   As a reference I recommend Javadoc on formatter syntax

User · Answer

To answer your updated question you can do  String   lines     Name                Bob n             Age                 27 n             Occupation          Student n             Status              Single   split   n     for  String line   lines        String   parts   line split              System out printf   -19s  s n   parts 0          parts 1        prints  Name                Bob Age                 27 Occupation          Student Status              Single

User · Answer

EDIT  This is an extremely primitive answer but I can t delete it because it was accepted  See the answers below for a better solution though  Why not just generate a whitespace string dynamically to insert into the statement   So if you want them all to start on the 50th character     String key    Name     String space       for int i  i lt  50-key length   i     space   space         String value    Bob n   System out println key space value     Put all of that in a loop and initialize set the  key  and  value  variables before each iteration and you re golden  I would also use the StringBuilder class too which is more efficient

User · Answer

For decimal values you can use DecimalFormat  import java text     public class DecimalFormatDemo       static public void customFormat String pattern  double value           DecimalFormat myFormatter   new DecimalFormat pattern         String output   myFormatter format value         System out println value          pattern          output            static public void main String   args           customFormat                123456 789         customFormat           123456 789         customFormat  000000 000   123 78         customFormat                 12345 67              and output will be   123456 789                123 456 789 123456 789                123456 79 123 78      000000 000    000123 780 12345 67                   12 345 67   For more details look here   http   docs oracle com javase tutorial java data numberformat html

[java] Java output formatting for Strings

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