Please help me out with this error I am getting in my mini clock program

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Java

Here are my two files..

import java.time.*;
/**
 *
 * @author 
 */
public class Clock  {
	public static void main(String[] args){}
    private LocalTime startTime;
    private LocalTime stopTime;

    public Clock(){
        startTime=LocalTime.now();

    }

    /**
     * Set the start time 
     * @param time: start time
     **/
    public void start(LocalTime time){
        startTime= time;
    }
    
    
    /**
     *Set the Stop time 
     * @param time: stop time
     **/
    public void stop(LocalTime time){
        stopTime=time;
    }
    
    /**
     * This method will return total elapsed time
     **/
    public int getElapsedTime(){
        return (stopTime.toSecondOfDay() -startTime.toSecondOfDay());
    }//End Main
    
}//End Class

import java.time.*;
/**
 *
 * @author 
 */
public class TestClock {
    public static void main (String[] args){
        Clock clock=new Clock();
        clock.start(LocalTime.parse(args[0]));
        clock.stop(LocalTime.parse(args[1]));
        System.out.println("Elapsed time in seconds is: "+clock.getElapsedTime());
    }//End Main
}//End Class

Im getting the following error...

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at TestClock.main(TestClock.java:18)

Not sure where to go due to being new to Java.

Thank you.