Capitalise first letter in String

Question

I'm having trouble converting the first letter to Capital in a String:

rackingSystem.toLowerCase(); // has capitals in every word, so first convert all to lower case
StringBuilder rackingSystemSb = new StringBuilder();
rackingSystemSb.append(rackingSystem);
rackingSystemSb.setCharAt(0, Character.toUpperCase(rackingSystemSb.charAt(0))); 
rackingSystem = rackingSystemSb.toString();

This doesn't seem to work..

Any suggestions?

score 67 · Accepted Answer · edited May 06 '14 at 13:35

67

Try doing:

rackingSystem = rackingSystem.toLowerCase();

Instead of:

rackingSystem.toLowerCase();

Strings are immutable, you must reassign the result of toLowerCase().

Easier though, (as long as your String is larger than length 2):

rackingSystem = rackingSystem.substring(0,1).toUpperCase() + rackingSystem.substring(1).toLowerCase();

edited May 06 '14 at 13:35

Jawwad

1,296
2
9
17

answered Mar 06 '13 at 23:02

A--C

35,565
10
102
90

5

`public static String capitalize(String s) { if(s == null) return null; if(s.length() == 1){ return s.toUpperCase(); } if(s.length() > 1){ return s.substring(0,1).toUpperCase() + s.substring(1); } return ""; }` – Roel May 04 '15 at 12:16

ElefantPhace · Answer 2 · 2013-04-01T05:01:03.210

18

StringBuilder rackingSystemSb = new StringBuilder(rackingSystem.toLowerCase());
rackingSystemSb.setCharAt(0, Character.toUpperCase(rackingSystemSb.charAt(0)));
rackingSystem = rackingSystemSb.toString();

edited Apr 01 '13 at 05:01

answered Mar 06 '13 at 23:05

ElefantPhace

3,743
3
18
36

Capitalise first letter in String

2 Answers2

Linked