Get item from string array and pack with blank space

[firewalll]

here is the string array value:

String[] regionList
where
regionList[0] = "AAA"
regionList[1] = "BBBB"


I would like to check all items and change to fix length 4

that is

regionList[0] = "AAA "
regionList[1] = "BBBB"

How could I get from the string array and add " " to the end of the item?
:):):):):):)

[pbrockway2]

You get the strings from the array using the index notation as you did in your post. Ie

regionList[0] is the first string in the array
regionList[1] is the second.

Since Strings are immutable you will have to replace the string in the array with the padded string.

You could concatenate the string with a space:

regionList[0] = regionList[0] + " ";

Or you could use StringBuilder which offers an append() method. The most flexible (but complicated) method would be to use the Formatter class.

StringBuilder buf = new StringBuilder();
Formatter formatter = new Formatter(buf);
regionList[0] = formatter.format("%-4s", regionList[0]).toString();
System.out.printf("|%s|%n", regionList[0]);

The format expression "%-4s" means "format to width 4 padding with spaces on the right" as described in the API documentation linked to above.

[firewalll]

The first method is easier to understand. I will implement using this way.
Thanks pbrockway2