CODEWITHSUNDEEP
java
Sarwan
Sarwan

Reputation: 657

Java compilation fails using split function

I have the following code but it does not work. Not sure what is wrong here:

import java.util.*;
import java.lang.*;
import java.io.*;


class Ideone
{
  public static void main (String[] args) throws java.lang.Exception
  {
    String ext_time = "23:24:25+26";
    String short_time[] = ext_time.split("+");
    System.out.print(short_time[0]);
  }
}

I wanted to take string 23:24:25 out of 23:24:25+22. How would I do it?

Upvotes: 0

Views: 107

Answers (3)

Mangesh Jogade
Mangesh Jogade

Reputation: 169

In split command '+' without escape will mean following :

'+' --> Occurs one or more times, is short for {1,} X+ - Finds one or several letter X

Please escape '+' character in your regex, Hence your new code will be

String short_time[] = ext_time.split("\\+");

Please refer following link for more details on split regex : http://www.vogella.com/tutorials/JavaRegularExpressions/article.html

Upvotes: 1

Adrien
Adrien

Reputation: 375

Firts is not a good name variable with brackets short_time[],

but ok, I runned your code and had: Exception in thread "main" java.util.regex.PatternSyntaxException: Dangling meta character '+' near index 0

'+' is a meta character of regEx, like bar or dot you have to escape it use ext_time.split("\\+");

Upvotes: 1

AntonH
AntonH

Reputation: 6437

You need to escape the + character:

String short_time[] = ext_time.split("\\+");

Normally, the plus + character is a quantifier in regex, meaning at least one of the previous character/group. So to split with the character, it needs to be escaped. And since the backslash\ is itself a special character, it needs to be escaped also. Thus, "\\+".

Upvotes: 4

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