CODEWITHSUNDEEP
javaregex
JPG
JPG

Reputation: 1253

split string using regex for time formats in java

I have a String which could contain any of the below two time formats:

I want to split this string in java using regex.

example: String str="hello ram, you logged in at1:46 PM we welcome you. Hello ram you logged out at(2:49:02 PM) see you again."

expected output using split using regex should be:

hello ram, you logged in at

1:46 PM we welcome you. Hello ram you logged out at

(2:49:02 PM) see you again.

what regex should I use in this case. I want the spliting of text in both time formats in new line. guide me.

Upvotes: 0

Views: 164

Answers (3)

Bohemian
Bohemian

Reputation: 424993

This regex splits the input as required:

(?=\(\d\d?:\d\d:\d\d [AP]M\)|\d\d?:\d\d [AP]M [^)])

See live regex demo.

Some test code:

public static void main (String[] args) {
    String str="hello ram, you logged in at1:46 PM we welcome you. Hello ram you logged out at(2:49:02 PM) see you again.";
    Arrays.stream(str.split("(?=\\(\\d\\d?:\\d\\d:\\d\\d [AP]M\\)|\\d\\d?:\\d\\d [AP]M [^)])")).forEach(System.out::println);
}

Output:

hello ram, you logged in at
1:46 PM we welcome you. Hello ram you logged out at
(2:49:02 PM) see you again.

Upvotes: 0

anubhava
anubhava

Reputation: 785058

You can use it like this in Java:

Pattern p = Pattern.compile(
  "(?im)((?:^|\\(?\\d+(?::\\d+)+\\s+[AP]M\\)?).*?)(?=\\(?\\d+(?::\\d+)+\\s+[AP]M\\)?|$)");

Matcher m = p.matcher(input);

while (m.find() {
   System.out.println(m.group(1));
}

RegEx Demo

Output

hello ram, you logged in at
1:46 PM we welcome you. Hello ram you logged out at
(2:49:02 PM) see you again.

Upvotes: 0

Jan
Jan

Reputation: 43169

You could come up with something like:

(?<tsp>\d+(?::\d+)+)\s[AP]M
# Looks for a digit (minimum 1)
# followed by at least one (or multiple pairs) of ":" and another digit
# this pattern is captured in a named group called tsp
# ... which in turn is followed by a whitespace and "AM" or "PM"

See a demo on regex101.

Upvotes: 1

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