Hello, I need this to be done in java eclipse, test harness and JUnit are provided.

This java program is about calculating a factorial with big integer

I need to implement two classes

StopWatch class to calculate the elapsed time for the operation to be done

LargeFactorial to calculate the factorial for Biginteger

Here is the uml

package week14;

import java.util.List;

import org.junit.runner.Result;

import org.junit.runner.notification.Failure;

/**

* This class executes the JUnit Test specified from the command line This will

* be used by the reference system for testing your code.

*/

public class TestHarness

{

public static void main(String[] args)

{

trace("TestHarness");

try

{

Result result = org.junit.runner.JUnitCore

.runClasses(Week14JUnitTest.class);

int runs = result.getRunCount();

int ignores = result.getIgnoreCount();

trace(String.format("Runs: %d", runs));

trace(String.format("Ingores: %d", ignores));

int failCount = result.getFailureCount();

if(failCount > 0)

{

List failures = result.getFailures();

for(Failure fail : failures)

{

trace("FAILED: " + fail.getMessage());

}

}

else

{

trace("SUCCESS");

}

}

catch(Exception ex)

{

trace("Unhandled exception: " + ex.getMessage());

}

}

private static void trace(String msg)

{

System.out.println(msg);

}

}

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

package week14;

import static org.junit.Assert.*;

import java.math.BigInteger;

import java.util.ArrayList;

import java.util.List;

import org.junit.Test;

/**

* Tests the week14 application

*/

public class Week14JUnitTest

{

/**

* Pass in invalid guesses and get an InvalidArgumentException

*/

@Test

public void testBigInteger()

{

trace("testBigInteger");

setupTestData();

StopWatch watch = new StopWatch();

try

{

for(TestData data : m_testData)

{

int number = data.getFactorial();

String expected = data.getExpected();

watch.start();

BigInteger result = LargeFactorial.factorial(number);

watch.stop();

long elapsed = watch.getElapsedTimeMilliSeconds();

String actual = result.toString();

String msg = String.format("%dms: %d! is ", elapsed, number);

trace(msg);

trace(actual);

assertTrue(String.format("Factorial: %d, Expected: %s, Actual: %s",

number, expected, actual),

expected.equals(actual));

}

}

catch(Exception ex)

{

trace(ex.toString());

fail("Error testBigInteger " + ex.getMessage());

}

}

private void trace(String msg)

{

System.out.println(msg);

}

private void setupTestData()

{

m_testData = new ArrayList();

m_testData.add(new TestData(10, "3628800"));

m_testData.add(new TestData(50, "30414093201713378043612608166064768844377641568960512000000000000"));

m_testData.add(new TestData(100, "93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000"));

m_testData.add(new TestData(500, "1220136825991110068701238785423046926253574342803192842192413588385845373153881997605496447502203281863013616477148203584163378722078177200480785205159329285477907571939330603772960859086270429174547882424912726344305670173270769461062802310452644218878789465754777149863494367781037644274033827365397471386477878495438489595537537990423241061271326984327745715546309977202781014561081188373709531016356324432987029563896628911658974769572087926928871281780070265174507768410719624390394322536422605234945850129918571501248706961568141625359056693423813008856249246891564126775654481886506593847951775360894005745238940335798476363944905313062323749066445048824665075946735862074637925184200459369692981022263971952597190945217823331756934581508552332820762820023402626907898342451712006207714640979456116127629145951237229913340169552363850942885592018727433795173014586357570828355780158735432768888680120399882384702151467605445407663535984174430480128938313896881639487469658817504506926365338175055478128640000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"));

}

private List m_testData = new ArrayList();

/**

* Represents a specific test data point

* @author Scott

*/

class TestData

{

TestData(int factorial, String expected)

{

m_factorial = factorial;

m_expected = expected;

}

int getFactorial()

{

return m_factorial;

}

String getExpected()

{

return m_expected;

}

private int m_factorial;

private String m_expected;

}

}

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

Large Factorial factorial long) BigInteger StopWatch m start Time long m stop Time :long finalize() :void getElapsed Time Seconds 0 :long get StartTime0 long get StopTime() :long start() :void stop0 void Stop Watch 0 Week 14JUnitTest m testData :List