TimeComputation for processing sqrt and Input and Output operations. : Calendar Date « Development Class « Java

1. Java
2. Development Class
3. Calendar Date

TimeComputation for processing sqrt and Input and Output operations.

       

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DecimalFormat;

/**
 * TimeComputation for processing sqrt and Input and Output operations.
 * 
 * @author Ian Darwin, http://www.darwinsys.com/
 * @version $Id: TimeComputation.java,v 1.7 2004/02/09 03:33:46 ian Exp $
 */
public class TimeComputation {
  public static void main(String[] argv) {
    try {
      new TimeComputation().run();
    } catch (IOException e) {
      System.err.println(e);
    }
  }

  public void run() throws IOException {

    DataOutputStream n = new DataOutputStream(new BufferedOutputStream(
        new FileOutputStream("java2s")));
    long t0, t1;
    System.out.println("Java Starts at "
        + (t0 = System.currentTimeMillis()));
    double k;
    for (int i = 0; i < 100000; i++) {
      k = 2.1 * Math.sqrt((double) i);
      n.writeDouble(k);
    }
    System.out.println("Java Ends at " + (t1 = System.currentTimeMillis()));
    double deltaT = t1 - t0;
    System.out.println("This run took "
        + DecimalFormat.getInstance().format(deltaT / 1000.)
        + " seconds.");
  }

}

           
         
    
    
    
    
    
    
  

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