TimeIntervalCheck

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Time Interval Java Program

Project Requirment:

• Writing a program to test the relationships between time intervals.
• The program should contain four classes.
• The first class should a generic class Interval defined for any type that implements the Comparable interface.
• Objects of this type have a start and end of the generic type parameter that defines the start and end of the interval.
• The class should be immutable, so it should have no setter methods.

Explain Scripts & Steps Taken:

Interval Script

1. Created a constructor that accepts the start and end of an interval
• Interval(T start, T end)
• constructs an Interval object{this.start = start; this.end = end;


2. Created a method within that is supplied an object of the generic type parameter
• within(T object)
• returns whether that object is inside the interval including the endpoints:
• (object.compareTo(start) >= 0) && (object.compareTo(end) <= 0);


3. Created a method subinterval that is passed an interval as a parameter
• subinterval(Interval interval)</li> </ul>
  
• Return whether the interval parameter is a subinterval and completely within the interval on which the method is invoked
• interval.start.compareTo(this.start) >= 0 && interval.end.compareTo(this.end) <= 0;


• Created a method overlaps that is passed an interval as a parameter
• overlaps(Interval interval)</li> </ul>
  
• Return whether the interval parameter overlaps the interval on which the method is invoked
• interval.start.compareTo(this.end) < 0&&
• this.start.compareTo(interval.end) < 0;
</ol>


Time Script

1. Created a constructor that accepts the hours and minutes as integers and the meridian as a string
• Time(int hours, int minutes, String meridian)


2. constructed a Time object:
• this.hours = hours;
• this.minutes = minutes;
• this.meridian = meridian;


3. Created a constructor that accepts a string representation of a time in the format HH:MM AM
• Time(String time)


4. constructed a Time object
• this.hours = h;
• this.minutes = m;
• this.meridian = mer;


5. Created a method compareTo that compares two times
• compareTo(Time secondTime)
• if (this.meridian.equals(secondTime.meridian)){


6. Return what is required of all such methods needed to implement the Comparable interface
• return (this.hours %12 * 60 + this.minutes) - (secondTime.hours %12 * 60 + secondTime.minutes);


7. Created a method toString that returns the string representation of the time in the format time the format HH:MM AM
• String.format("%02d:%02d %s", hours, minutes, meridian);



InvalidTime Script

1. Created a constructor that accepts the message as a string and constructs an InvalidTime object
• InvalidTime(String message){
• constructs an InvalidTime object
• this.message = message;


2. Created a method getMessage that returns the message
• String getMessage() {
• return message;



Main Script

• Implement a GUI interface that contains two buttons.


1. The first button CompareIntervals should compare the two intervals and output one of the following messages depending upon how the intervals compare
• Interval 1 is a sub-interval of interval 2
• Interval 2 is a sub-interval of interval 1
• The intervals overlap
• The intervals are disjoint


2. The second button CheckTime should check whether the time is within the intervals and output one of the following messages depending upon which intervals it is within:
• Both intervals contain the time HH:MM AM
• Only interval 1 contains the time HH:MM AM
• Only interval 2 contains the time HH:MM AM
• Neither interval contains the time HH:MM AM