Java Programming Task 1 With Solution

Design a class named StopWatch. The class contains:

Private data fields are startTime and endTime with getter methods.
A no-arg constructor that initializes startTime with the current time.
A method named start() that resets the startTime to the current time.
A method named stop() that sets the endTime to the current time.
A method named getElapsedTime() that returns the elapsed time for the stopwatch in milliseconds.

Write a test program and create a stopwatch and call all methods.

The task is explanatory itself, if you focus however here's an explanation for you:

First of all, declare two private data fields 'startTime' & 'endTime' as said in the task, as we know the time can set in seconds means values in points, therefore, we have to use data type float.
Then, we have asked to create a no argument constructor which will be used to initialize the current time.
Then we have to create methods of start, stop and getEplasedTime to get elapsed time.
In the end, we have been told that create two classes one is Test class another is StopWatch class.

In the StopWatch class, we'll do all of our work such as the declaration of variables and creation of method.
And in the Test class, we'll call method created in StopWatch class

	public class StopWatch
	{
	// private data fields
	private float startTime;
	private float endTime;

	// getter methods
	public float getStartTime(){
	return startTime;
	}

	public float getEndTime()
	{
	return endTime;
	}

	// no - arg constructor
	public StopWatch()
	{

	}

	// start method
	public void start(float startTime)
	{
	this.startTime = startTime;
	}

	//stop method
	public void stop(float endTime)
	{
	this.endTime = endTime;
	}

	// elpsed time method
	public float getElapsedTime()
	{
	return ((endTime - startTime) * 1000);
	}
	}

view raw Task-1.java hosted with ❤ by GitHub

	class Test
	{
	public static void main(String[] args)
	{
	StopWatch stopwatch1 = new StopWatch(); // object of stopwatch class
	stopwatch1.start(10); // reseting the start time through method calling
	stopwatch1.stop(20); // setting the stop time through method calling
	stopwatch1.getStartTime(); // getting the start time through method calling
	stopwatch1.getEndTime(); // getting the stop time through method calling
	stopwatch1.getElapsedTime(); // getting the elapsed time through method calling
	}
	}

view raw Test.java hosted with ❤ by GitHub

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