Design a class named StopWatch. The class contains:■■ Private data fields 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 thestopwatch in milliseconds.Draw the UML diagram for the class then implement the class. Write a test programthat measures the execution time of sorting 100,000 numbers using selection sort.

EBK JAVA PROGRAMMING
9th Edition
ISBN:9781337671385
Author:FARRELL
Publisher:FARRELL
Chapter11: Advanced Inheritance Concepts
Section: Chapter Questions
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Design a class named StopWatch. The class contains:
■■ Private data fields 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.
Draw the UML diagram for the class then implement the class. Write a test program
that measures the execution time of sorting 100,000 numbers using selection sort.

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