Remove text after a space

Question

I need to remove the text after a space in a string using Java.

Input:

0 21343434
2 2323
6 232312

Output:

0
2
6

Anyone know how to do this? Just need to edit the string to remove everything after the space? Thanks!

You should probably try some basic code first and paste it here if it doesn't work, rather than ask a 'how do I do this' question. — acutesoftware, Jul 08 '13 at 04:27

score 5 · Answer 1 · answered Jul 08 '13 at 04:05

5

Use a regular expression

String result = "0 21343434".replaceAll(" .+$", "");

answered Jul 08 '13 at 04:05

user2480415

77
2

great one............................... – Aamir Aug 01 '16 at 07:47

score 5 · Answer 2 · answered Jul 08 '13 at 04:07

5

String string=  "0 21343434";
int spacePos = string.indexOf(" ");
if (spacePos > 0) {
   String youString= string.substring(0, spacePos - 1);
}

answered Jul 08 '13 at 04:07

Dinup Kandel

2,457
4
21
38

1

that's honestly a really cool way of solving this problem that I've never seen before – gcalex5 Jul 08 '13 at 04:09
1

Great answer! loved it – lonesome Mar 01 '16 at 02:49

score 0 · Answer 3 · edited May 23 '17 at 10:32

0

Parse the string character by character with a for loop and search for a null then save the first character to a string and output it.

If you are newer to programming I'd refer you to this question and you may be able to use it to start moving in the right direction of your question

Remove "empty" character from String

edited May 23 '17 at 10:32

Community

1
1

answered Jul 08 '13 at 04:02

gcalex5

1,091
2
13
23

score 0 · Answer 4 · answered Jul 08 '13 at 04:05

0

If you need to save the output in a file, you can read the input line by line and in each line just read the first character then save it to another file. At the end remove the first file and change the name of second file to the first file.

answered Jul 08 '13 at 04:05

smo

167
7

score 0 · Answer 5 · edited Nov 10 '16 at 06:22

0

Try this,

String str =  "0 21343434";
String[] vals = str.split(" ");
if (vals.length > 1)
    String value = vals[0];

edited Nov 10 '16 at 06:22

Netch

4,171
1
19
31

answered Jul 08 '13 at 04:12

Michael Shrestha

2,547
19
30

score 0 · Answer 6 · answered Jul 08 '13 at 04:53

Really simple. Make use of the indexOf method, substring method, and the ? operator to handle your base case (no spaces) and future cases (1 or more spaces).

String str = "hello world";
int firstSpace = (str.indexOf(" ") >= 0) ? str.indexOf(" ") : str.length()-1;
return str.substring(0,firstSpace);

This handles the case of there being no spaces as well. If there is no whitespace at all, the ? operation will return the value at the end of the string. Which in turn will output the whole string itself. Below are some examples:

Input:

0 21343434
2 2323
6232312

Output:

0
2
6232312

Remove text after a space

6 Answers6