Clock Project Demo Code by Silvestri

## Clock.java
/*
 * Tony Silvestri
 * Clock class emulates a normal clock
 * 2/2/16
 * silvestri@stcc.edu
 * CSC-112 Intermediate Java
 */

public class Clock extends Object implements Comparable<Clock> {
	private int hr;
	private int min;
	private int sec;
	private static int count;

	public static Clock midNight = new Clock(0, 0, 0);
	public static Clock noon = new Clock(12, 0, 0);

	// **************************************************

	public Clock(int hr, int min, int sec) {
		this.setHr(hr);
		this.setMin(min);
		this.setSec(sec);
		Clock.count++;
	}

	public Clock(int hr, int min) {
		this(hr, min, 0);
	}

	public Clock(int hr) {
		this(hr, 0, 0);
	}

	public Clock() {
		this(0, 0, 0);
	}

	// **************************************************

	public static Clock factory(int hr, int min, int sec) {
		return new Clock(hr, min, sec);
	}

	public static int getCount() {
		return count;
	}

	// **************************************************

	public int getHr() {
		return this.hr;
	}

	public void setHr(int hr) {
		if (hr >= 0 && hr <= 23)
			this.hr = hr;
		else
			System.err.println("ERROR: Bad hour assignment attempt = " + hr);
	}

	public int getMin() {
		return this.min;
	}

	public void setMin(int min) {
		if (min >= 0 && min <= 59)
			this.min = min;
		else
			System.err.println("ERROR: Bad minute assignment attempt = " + min);
	}

	public int getSec() {
		return this.sec;
	}

	public void setSec(int sec) {
		if (sec >= 0 && sec <= 59)
			this.sec = sec;
		else
			System.err
					.println("ERROR: Bad seconds assignment attempt = " + sec);
	}

	// **************************************************

	void tick() {
		this.incrementSeconds();
	}

	private void incrementSeconds() {
		this.sec++;
		if (this.sec > 59) {
			this.sec = 0;
			incrementMinutes();
		}
	}

	private void incrementMinutes() {
		this.min++;
		if (this.min > 59) {
			this.min = 0;
			incrementHours();
		}
	}

	private void incrementHours() {
		this.hr++;
		if (this.hr > 23) {
			this.hr = 0;
		}
	}

	// ***********************************************

//	public String toString() {
//		return this.hr + ":" + this.min + ":" + this.sec;
//	}
//
//	public String toString() {
//		String retval = "";
//		if (this.hr < 10)
//			retval += "0";
//		retval += this.hr + ":";
//		if (this.min < 10)
//			retval += "0";
//		retval += this.min + ":";
//		if (this.sec < 10)
//			retval += "0";
//		retval += this.sec;
//		return retval;
//	}
//
//	public String toString() {
//		StringBuilder retval = new StringBuilder();
//		if (this.hr < 10)
//			retval.append("0");
//		retval.append(this.hr);
//		retval.append(":");
//		if (this.min < 10)
//			retval.append("0");
//		retval.append(this.min);
//		retval.append(":");
//		if (this.sec < 10)
//			retval.append("0");
//		retval.append(this.sec);
//		return retval.toString();
//	}

	public String toString() {
		return String.format("%02d:%02d:%02d", this.hr, this.min, this.sec);
	}

	public void finalize() {
		Clock.count--;
	}

	public boolean equals(Clock c) {
		if (this.hr != c.hr)
			return false;
		if (this.min != c.min)
			return false;
		if (this.sec != c.sec)
			return false;
		return true;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Clock other = (Clock) obj;
		if (hr != other.hr)
			return false;
		if (min != other.min)
			return false;
		if (sec != other.sec)
			return false;
		return true;
	}

	@Override
	public int compareTo(Clock c) {
		int temp = this.hr - c.hr;
		if (temp != 0)
			return temp;
		temp = this.min - c.min;
		if (temp != 0)
			return temp;
		temp = this.sec - c.sec;
		return temp;
	}

}

## MurrayClockDriver.java
import java.util.Calendar;

/*Nathaniel Murray
 * 01/25/17
 * Interm JAVA
 * Class 01/25/17
 * Creates a real time clock
 * nmurray3861@student.stcc.edu
 */
public class MurrayClockDriver {

//	public static void keepTime(Clock x, long millis) {
//		int secs = ((int) (millis / 1000) % 60);
//		int mins = ((int) (millis / 60000) % 60);
//		int hours = ((int) ((millis / 3600000) % 12) + 7);
//		x.setHr(hours);
//		x.setMin(mins);
//		x.setSec(secs);
//	}

	public static void keepTime(Clock x, long millis) {
		Calendar cal = Calendar.getInstance();
		cal.setTimeInMillis(millis);
		int secs = cal.get(Calendar.SECOND);
		int mins = cal.get(Calendar.MINUTE);
		int hours = cal.get(Calendar.HOUR);
		x.setHr(hours);
		x.setMin(mins);
		x.setSec(secs);
	}

	public static void printTime(Clock x) {
		System.out.println(x.getHr() + ":" + x.getMin() + ":" + x.getSec());
	}

	public static void main(String[] args) throws InterruptedException {
		Clock clock1 = new Clock(9, 56, 45);
		do {
			clock1.tick();
			//keepTime(clock1, millis);
			printTime(clock1);
			Thread.sleep(1000);
		} while (true);
	}
}

## TestClock.java

public class TestClock {

	public static void main(String[] args) {
		Clock kitchen = new Clock(23, 59, 50);
		Clock livingRoom  = new Clock(23, 59, 50);

		for (int i = 0; i < 20; i++) {
			kitchen.tick();  // Simulate Clock tick
			System.out.println(kitchen);
		}

		System.out.println("Number of Clocks: " + Clock.getCount());

		kitchen = livingRoom;

		System.gc();
		try {
			Thread.sleep(100);
		}
		catch (Exception e) {
		}
		System.out.println("Number of Clocks: " + Clock.getCount());

		Clock a = new Clock(23, 41, 2);
		Clock b = new Clock(23, 41, 2);
		if (a.compareTo(b) < 0)
			System.out.println("a < b");
		else if (a.compareTo(b) > 0)
			System.out.println("a > b");
		else
			System.out.println("a == b");

	}

}

## TimerTest.java
import java.util.Timer;
import java.util.TimerTask;

public class TimerTest {
    public static void main(String args[]) {
    	Clock c = new Clock(23, 59, 50);
        Timer timer = new Timer();
        Task task = new Task(c);
        timer.schedule(task, 0, 1000);
    }
}

class Task extends TimerTask  {
	Clock c;
	public Task (Clock c) {
		this.c = c;
	}

    public void run() {
    	c.tick();
    	System.out.println(c);
    }
}