edu.princeton.cs.introcs

Class Stopwatch

java.lang.Object

edu.princeton.cs.introcs.Stopwatch

public class Stopwatch
extends Object

Compilation: javac Stopwatch.java

Constructor Summary

Constructors

Constructor and Description
Stopwatch()

Method Summary

Methods

Modifier and Type	Method and Description
double	elapsedTime()
static void	main(String[] args) The test client compares the method for computing square roots in Java's Math library with our implementation from Program 2.1.1 th uses Newton's method for the task of computing the sum of t e square roots of the numbers from 0 to N-1.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Stopwatch

public Stopwatch()

Method Detail

elapsedTime

public double elapsedTime()

main

public static void main(String[] args)

The test client compares the method for computing square roots in Java's Math library with our implementation from Program 2.1.1 th uses Newton's method for the task of computing the sum of t e square roots of the numbers from 0 to N-1. For this quick test, the Java implementation Math.sqrt() is about 20 times faster than our Newton.sqrt() (as it should be!).