com.discursive.jccook.lang.StopWatchExample.java Source code

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Here is the source code for com.discursive.jccook.lang.StopWatchExample.java

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/* 
 * ========================================================================
 * 
 * Copyright 2005 Tim O'Brien.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * ========================================================================
 */
package com.discursive.jccook.lang;

import java.text.NumberFormat;

import org.apache.commons.lang.time.StopWatch;

public class StopWatchExample {

    StopWatch clock = new StopWatch();

    public static void main(String[] args) {
        StopWatchExample example = new StopWatchExample();
        example.start();
    }

    private void start() {
        NumberFormat format = NumberFormat.getInstance();

        System.out.println("How long does it take to take the sin of 0.34 ten million times?");
        clock.start();
        for (int i = 0; i < 100000000; i++) {
            Math.sin(0.34);
        }
        clock.stop();

        System.out.println("It takes " + clock.getTime() + " milliseconds");

        System.out.println("How long does it take to multiply 2 doubles one billion times?");
        clock.reset();
        clock.start();
        for (int i = 0; i < 1000000000; i++) {
            double result = 3423.2234 * 23e-4;
        }
        clock.stop();
        System.out.println("It takes " + clock.getTime() + " milliseconds.");

        System.out.println("How long does it take to add 2 ints one billion times?");
        clock.reset();
        clock.start();
        for (int i = 0; i < 1000000000; i++) {
            int result = 293842923 + 33382922;
        }
        clock.stop();
        System.out.println("It takes " + clock.getTime() + " milliseconds.");

        System.out.println("Testing the split() method.");
        clock.reset();
        clock.start();
        try {
            Thread.sleep(1000);
        } catch (Exception e) {
        }
        clock.split();
        System.out.println("Split Time after 1 sec: " + clock.getTime());
        try {
            Thread.sleep(1000);
        } catch (Exception e) {
        }
        System.out.println("Split Time after 2 sec: " + clock.getTime());
        clock.unsplit();
        try {
            Thread.sleep(1000);
        } catch (Exception e) {
        }
        System.out.println("Time after 3 sec: " + clock.getTime());

    }
}