Trim and Lowercase

Question

Every time I try doing the trim method and the lowercase method it doesn't show the way I want it.

sentence.trim();
sentence.toLowerCase();
System.out.println("\"" + sentence + "\"" + " ---> ");

For example, if I input " Hello World! ", it will print out " Hello World! " and not use any of the methods.

Strings are immutable. Say this 100 times and write this on the chalk board 100 times. — Hovercraft Full Of Eels, Oct 13 '16 at 02:04
`int i = 7; i * 2; System.out.println(i);` <- why does this print 7 and not 14? — user253751, Oct 13 '16 at 02:47
It is supposed to be "i *= 2" or in other words "i = i * s", it is because "i * 2" has to be stored in a double or int value like we have here. — Thomas ClassiFied, Oct 13 '16 at 10:27

score 10 · Accepted Answer · edited Nov 12 '19 at 15:20

10

You need to store the value returned:

sentence = sentence.trim().toLowerCase();

edited Nov 12 '19 at 15:20

Milo

answered Oct 13 '16 at 02:04

Amer Qarabsa

Hypnic Jerk · Answer 2 · 2016-10-21T17:33:49.600

3

You need to do

sentence = sentence.trim();
sentence = sentence.toLowerCase();

edited Oct 21 '16 at 17:33

answered Oct 13 '16 at 02:04

Hypnic Jerk

score 1 · Answer 3 · answered Oct 13 '16 at 02:04

1

They don't trim or lowercase "in-place"

You could just put it in the print statement, though

System.out.println("\"" + sentence.trim().toLowerCase() + "\"" + " ---> ");

answered Oct 13 '16 at 02:04

OneCricketeer

3 Answers3