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 testprogram that measures the execution time of sorting 100,000 numbers usingselection sort. Java API has theGregorianCalendar class in the java.util package, which you can use toobtain the year, month, and day of a date. The no-arg constructor constructs aninstance for the current date, and the methodsget (GregorianCalendar. YEAR), get (GregorianCalendar. MONTH), andget (GregorianCalendar.DAY_OF_MONTH) return the year, month, and day.Write a program to perform two tasks:1. Display the current year, month, and day.2. The GregorianCalendar class has the setTimeInMillis (long),which can be used to set a specified elapsed time since January 1, 1970.Set the value to 1234567898765L and display the year, month, and day.

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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.

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.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Java API has the GregorianCalendar class in the java.util package, which you can use to obtain the year, month, and day of a date. The no-arg constructor constructs an instance for the current date, and the methods get (GregorianCalendar . YEAR), get (GregorianCalendar . MONTH), and get (GregorianCalendar.DAY_OF_MONTH) return the year, month, and day. Write a program to perform two tasks: 1. Display the current year, month, and day. 2. The GregorianCalendar class has the setTimeInMillis (long), which can be used to set a specified elapsed time since January 1, 1970. Set the value to 1234567898765L and display the year, month, and day.
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