Conversion from 12 hours time to 24 hours time in java

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Try this:

import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {
   public static void main(String [] args) throws Exception {
       SimpleDateFormat displayFormat = new SimpleDateFormat("HH:mm");
       SimpleDateFormat parseFormat = new SimpleDateFormat("hh:mm a");
       Date date = parseFormat.parse("10:30 PM");
       System.out.println(parseFormat.format(date) + " = " + displayFormat.format(date));
   }
}

which produces:

10:30 PM = 22:30

See: http://download.oracle.com/javase/1.5.0/docs/api/java/text/SimpleDateFormat.html

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