如何从 selenium java 中的字符串中删除动态 substring

Question

I want to remove sub string from my string which is dynamic date time.

Example:

Nov 19, 2019 05:41:08 AM EST

I need:

Nov 19, 2019 05 AM EST this kind of string

I want to remove minutes and second from the string.

Answer 1

You may try a regex string replacement:

String input = "Nov 19, 2019 05:41:08 AM EST";
String output = input.replaceAll("\\b(\\d{2}):\\d{2}:\\d{2}\\b", "$1");
System.out.println(output);

This prints:

Nov 19, 2019 05 AM EST

A perhaps more robust approach would be to go back to the Date , LocalDate/LocalDateTime which generated the current output and instead format using the new mask you want.

Answer 2

You can use regex to remove everything between the first : and the first blank space

String original = "Nov 19, 2019 05:41:08 AM EST"; 
String stripped = original.replaceAll(":.*? ", " ");
System.out.print(stripped); // prints Nov 19, 2019 05 AM EST

Answer 3

If you are not comfortable with RegEx, you can use the following solution:

public class Main {
    public static void main(String[] args) {        
        String dateString="Nov 19, 2019 05:41:08 AM EST";
        String requiredString=dateString.replace(dateString.substring(dateString.indexOf(':'),dateString.indexOf(' ',dateString.indexOf(':'))),"");
        System.out.println(requiredString);
    }
}

Output:

Nov 19, 2019 05 AM EST

There are many other ways as well eg using DateTimeFormatter