Java regex to fetch HH:MM:SS from a string

String time = "Thu Dec 22 01:12:22 UTC 2022";

How to fetch the HH:MM:SS (01:12:22) here using java regex . So the output should be 01:12:22 I am using the below code but its not working.

    System.out.println("Hello, World!");
    String time = "Thu Dec 22 01:12:22 UTC 2022";
    String pattren = "(?:2[0-3]|[01][0-9]):[0-5][0-9]:[0-5][0-9]";
    Pattern p = Pattern.compile(pattren);
    Matcher m = p.matcher(time);
    System.out.println("h");

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

Solution

Regex is overkill here.

`String#split`

You could simply split the string by SPACE character, and take the fourth piece of text. Access the fourth piece with an index of three.

String timeText = input.split( " " )[ 3 ] ;

See this code run at Ideone.com.

01:12:22

Or, as commented, you could parse the entire string as a java.time object. Then extract the LocalTime. For this approach, see the Answer by Arvind Kumar Avinash, and the Answer by hc_dev.