(Stopwatch) Design a class named StopWatch. The class contains:
• Private data fields startTime and endTime with get 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 and 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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