Open Education – Page 261

May 13

Driver class that creates three threaded objects (Counter2) that count from 0 to 4. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

By Author-Check- Article-or-Video in FromSitesTree.com

/** Try out a few instances of the Counter2 class. 

public class Counter2Test {
  public static void main(String[] args) {
    Counter2 c1 = new Counter2(5);
    Counter2 c2 = new Counter2(5);
    Counter2 c3 = new Counter2(5);
  }
}

/** A Runnable that counts up to a specified
 *  limit with random pauses in between each count.
 
public class Counter2 implements Runnable {
  private static int totalNum = 0;
  private int currentNum, loopLimit;

  public Counter2(int loopLimit) {
    this.loopLimit = loopLimit;
    currentNum = totalNum++;
    Thread t = new Thread(this);
    t.start();
  }

  private void pause(double seconds) {
    try { Thread.sleep(Math.round(1000.0*seconds)); }
    catch(InterruptedException ie) {}
  }
  
  public void run() {
    for(int i=0; i<looplimit ; i++) {
      System.out.println("Counter " + currentNum + ": " + i);
      pause(Math.random()); // Sleep for up to 1 second.
    }
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10294
Categories:Programming Code Examples, Java/J2EE/J2ME, Advanced Swing
Tags:Java/J2EE/J2MEAdvanced Swing
Post Data:2017-01-02 16:04:31

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Medium: https://medium.com/@SayedAhmedCanada

May 13

Counter2Test.java Driver class that creates three threaded objects (Counter2) that count from 0 to 4. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

By Author-Check- Article-or-Video in FromSitesTree.com

/** Try out a few instances of the Counter2 class. 

Driver class that creates three threaded objects (Counter2) that count from 0 to 4. In this case, the driver does not start the threads, as each thread is automatically started in Counter2's constructor. Uses the following class:
Counter2Test.java
Counter2.java
**************************    
public class Counter2Test {
  public static void main(String[] args) {
    Counter2 c1 = new Counter2(5);
    Counter2 c2 = new Counter2(5);
    Counter2 c3 = new Counter2(5);
  }
}

* Counter2.java A Runnable  that counts to a specified value and sleeps a random number of seconds in between counts. Here, the thread is started automatically when the object is instantiated.
/** A Runnable that counts up to a specified
 *  limit with random pauses in between each count.
 
public class Counter2 implements Runnable {
  private static int totalNum = 0;
  private int currentNum, loopLimit;

  public Counter2(int loopLimit) {
    this.loopLimit = loopLimit;
    currentNum = totalNum++;
    Thread t = new Thread(this);
    t.start();
  }

  private void pause(double seconds) {
    try { Thread.sleep(Math.round(1000.0*seconds)); }
    catch(InterruptedException ie) {}
  }
  
  public void run() {
    for(int i=0; i<looplimit ; i++) {
      System.out.println("Counter " + currentNum + ": " + i);
      pause(Math.random()); // Sleep for up to 1 second.
    }
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10293
Categories:Programming Code Examples, Java/J2EE/J2ME, Advanced Swing
Tags:Java/J2EE/J2MEAdvanced Swing
Post Data:2017-01-02 16:04:31

May 13

Template illustrating the second approach for creating a class with thread behavior. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

By Author-Check- Article-or-Video in FromSitesTree.com

Template illustrating the second approach for creating a class with thread behavior. In this case, the class implements the Runnable interface while providing a run method for thread execution. 
public class ThreadedClass extends AnyClass implements Runnable {
  public void run() {
    // Thread behavior here.
  }

  public void startThread() {
    Thread t = new Thread(this);
    t.start(); // Calls back to the run method in "this."
  }

  ...
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10292
Categories:Programming Code Examples, Java/J2EE/J2ME, Advanced Swing
Tags:Java/J2EE/J2MEAdvanced Swing
Post Data:2017-01-02 16:04:31

May 13

Creates and starts three threaded objects #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

By Author-Check- Article-or-Video in FromSitesTree.com

Creates and starts three threaded objects which count from 0 to 4. Uses the following class:
CounterTest.java
Counter.java
/** Try out a few instances of the Counter class. 
 public class CounterTest {
  public static void main(String[] args) {
    Counter c1 = new Counter(5);
    Counter c2 = new Counter(5);
    Counter c3 = new Counter(5);
    c1.start();
    c2.start();
    c3.start();
  }
}

Counter.java:A class that inherits from Thread and defines a run method that counts up to a specified value, pausing for a random time interval in between value counts.
/** A subclass of Thread that counts up to a specified
 *  limit with random pauses in between each count.
 
public class Counter extends Thread {
  private static int totalNum = 0;
  private int currentNum, loopLimit;

  public Counter(int loopLimit) {
    this.loopLimit = loopLimit;
    currentNum = totalNum++;
  }

  private void pause(double seconds) {
    try { Thread.sleep(Math.round(1000.0*seconds)); }
    catch(InterruptedException ie) {}
  }

  /** When run finishes, the thread exits. */
  
  public void run() {
    for(int i=0; i<looplimit ; i++) {
      System.out.println("Counter " + currentNum + ": " + i);
      pause(Math.random()); // Sleep for up to 1 second
    }
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10291
Categories:Programming Code Examples, Java/J2EE/J2ME, Advanced Swing
Tags:Java/J2EE/J2MEAdvanced Swing
Post Data:2017-01-02 16:04:31

May 13

Template illustrating the first approach for creating a class with thread behavior. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

By Author-Check- Article-or-Video in FromSitesTree.com

/** Taken from Core Web Programming from 
 *  Prentice Hall and Sun Microsystems Press,
  *  © 2001 Marty Hall and Larry Brown;
 *  may be freely used or adapted.
 */

public class ThreadClass extends Thread {
 public void run() {
   // Thread behavior here.
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10290
Categories:Programming Code Examples, Java/J2EE/J2ME, Advanced Swing
Tags:Java/J2EE/J2MEAdvanced Swing
Post Data:2017-01-02 16:04:31

May 12

Pointers #Programming Code Examples #Java/J2EE/J2ME #Ajax

By Author-Check- Article-or-Video in FromSitesTree.com

/* The following code example is taken from the book
 * "The C++ Standard Library - A Tutorial and Reference"
 * by Nicolai M. Josuttis, Addison-Wesley, 1999
 *
 * (C) Copyright Nicolai M. Josuttis 1999.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
#include <algorithm>
#include <iostream>

using namespace std;

/* function that compares two pointers by comparing the values to which they po
int
 */
bool int_ptr_less (int* a, int* b)
{
    return *a < *b;
}

int main()
{
    int x = 17;
    int y = 42;
    int* px = &x;
    int* py = &y;
    int* pmax;

    // call max() with special comparison function
    pmax = max (px, py, int_ptr_less);
    cout << *pmax;
    //...
}

 /* 
42
 */

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10195
Categories:Programming Code Examples, Java/J2EE/J2ME, Ajax
Tags:Java/J2EE/J2MEAjax
Post Data:2017-01-02 16:04:23

May 12

C++ Template Example #Programming Code Examples #Java/J2EE/J2ME #Ajax

By Author-Check- Article-or-Video in FromSitesTree.com

/* The following code example is taken from the book
 * "The C++ Standard Library - A Tutorial and Reference"
 * by Nicolai M. Josuttis, Addison-Wesley, 1999
 *
 * (C) Copyright Nicolai M. Josuttis 1999.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */

#include <iostream>
#include <vector>
#include <deque>
#include <list>
#include <set>
#include <map>
#include <string>
#include <algorithm>
#include <iterator>
#include <functional>
#include <numeric>

using namespace std;

/* PRINT_ELEMENTS()
 * - prints optional C-string optcstr followed by
 * - all elements of the collection coll
 * - separated by spaces
 */
template <class T>
inline void PRINT_ELEMENTS (const T& coll, const char* optcstr="")
{
    typename T::const_iterator pos;

    std::cout << optcstr;
    for (pos=coll.begin(); pos!=coll.end(); ++pos) {
        std::cout << *pos << ' ';
    }
    std::cout << std::endl;
}

/* INSERT_ELEMENTS (collection, first, last)
 * - fill values from first to last into the collection
 * - NOTE: NO half-open range
 */
template <class T>
inline void INSERT_ELEMENTS (T& coll, int first, int last)
{
    for (int i=first; i<=last; ++i) {
        coll.insert(coll.end(),i);
    }
}



// return whether the second object has double the value of the first
bool doubled (int elem1, int elem2)
{
   return elem1 * 2 == elem2;
}

int main()
{
   vector<int> coll;

   coll.push_back(1);
   coll.push_back(3);
   coll.push_back(2);
   coll.push_back(4);
   coll.push_back(5);
   coll.push_back(5);
   coll.push_back(0);

   PRINT_ELEMENTS(coll,"coll: ");

   // search first two elements with equal value
   vector<int>::iterator pos;
   pos = adjacent_find (coll.begin(), coll.end());

   if (pos != coll.end()) {
       cout << "first two elements with equal value have position "
            << distance(coll.begin(),pos) + 1
            << endl;
   }

}

/*
coll: 1 3 2 4 5 5 0
first two elements with equal value have position 5

 */

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10194
Categories:Programming Code Examples, Java/J2EE/J2ME, Ajax
Tags:Java/J2EE/J2MEAjax
Post Data:2017-01-02 16:04:23

May 12

Valarray Example #Programming Code Examples #Java/J2EE/J2ME #Ajax

By Author-Check- Article-or-Video in FromSitesTree.com

/* The following code example is taken from the book
 * "The C++ Standard Library - A Tutorial and Reference"
 * by Nicolai M. Josuttis, Addison-Wesley, 1999
 *
 * (C) Copyright Nicolai M. Josuttis 1999.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
#include <iostream>
#include <valarray>
using namespace std;

// print valarray
template <class T>
void printValarray (const valarray<T>& va)
{
    for (int i=0; i<va.size(); i++) {
        cout << va[i] << ' ';
    }
    cout << endl;
}

int main()
{
    // create and initialize valarray with nine elements
    valarray<double> va(9);
    for (int i=0; i<va.size(); i++) {
        va[i] = i * 1.1;
    }

    // print valarray
    printValarray(va);

    // double values in the valarray
    va *= 2.0;

    // print valarray again
    printValarray(va);

    // create second valarray initialized by the values of the first plus 10
    valarray<double> vb(va+10.0);

    // print second valarray
    printValarray(vb);

    // create third valarray as a result of processing both existing valarrays

    valarray<double> vc;
    vc = sqrt(va) + vb/2.0 - 1.0;

    // print third valarray
    printValarray(vc);
}

/*
0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8
0 2.2 4.4 6.6 8.8 11 13.2 15.4 17.6
10 12.2 14.4 16.6 18.8 21 23.2 25.4 27.6


 */

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10189
Categories:Programming Code Examples, Java/J2EE/J2ME, Ajax
Tags:Java/J2EE/J2MEAjax
Post Data:2017-01-02 16:04:23

May 12

Javascript : Miscellaneous Code #Programming Code Examples #Java/J2EE/J2ME #Ajax

By Author-Check- Article-or-Video in FromSitesTree.com

                var browser=navigator.appName;
                var b_version=navigator.appVersion;



<a href="http://www.justetc.net" target="_blank">
<img border="0" alt="hello" src="b_pink.gif" id="b1" width="26" height="26" onmouseover="mouseOver()" onmouseout="mouseOut()" />



Place the following code under script tag/in a javascript file

function mouseOver()
{
   document.getElementById("b1").src ="b_blue.gif";
}

function mouseOut()
{
   document.getElementById("b1").src ="b_pink.gif";
}


<map name="planetmap">

<area shape ="rect" coords ="0,0,82,126"
onMouseOver="writeText('You are over the target area')"
href ="target.htm" target ="_blank" alt="target" />

var t1=setTimeout("document.getElementById('id1').value='2 seconds!'",2000);
var t2=setTimeout("document.getElementById('id1').value='4 seconds!'",4000);
var t3=setTimeout("document.getElementById('id1').value='6 seconds!'",6000);

Direct Instance: 

pObj=new Object();
pObj.firstname="John";
pObj.lastname="Doe";
pObj.age=50;
pObj.eyecolor="blue";

document.write(pObj.firstname + " is " + pObj.age + " years

function car(brand,make,model)
{
this.brand=brand;
this.make=make;
this.model=model;
}
var myCar=new car("Honda","2009","Accord");
document.write(myCar.brand +  myCar.make + myCar.model );

try
{
}
catch(err)
{
}


Under script tag/javascript file:

onerror=handleErr;
var alertTxt = "" 

function handleErr(msg, url, l)
{
   alertTxt = "Error Information:.nn";
   alertTxt += msg + "n";
   alertTxt += url + "n";
   alertTxt += l + "nn";
   alertTxt += "Click OK to continue.nn";
   alert(alertTxt);
   return true;
}


var x;
var myFriends= new Array();
myFriends[0] = "Shafiq";
myFriends[1] = "Rafiq";
myFriends[2] = "Abba";
myFriends[3] = "Amma";

for (x in myFriends)
{
   document.write(myFriends[x] + "
");
}

var d = new Date();
theDay=d.getDay();
switch (theDay)
{
case 5:
  document.write("Friday");
  break;
case 6:
  document.write("Saturday");
  break;
case 0:
  document.write("Sunday");
  break;
}

   var pattern = new RegExp("e","g");
   do
   {
     result=pattern .exec("This is the line where the regular expression will be searched on");
     document.write(result);
   }
   while (result!=null)

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10181
Categories:Programming Code Examples, Java/J2EE/J2ME, Ajax
Tags:Java/J2EE/J2MEAjax
Post Data:2017-01-02 16:04:23

May 12

Controlling Image Loading #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

By Author-Check- Article-or-Video in FromSitesTree.com

~~~~~~~~~~~~~~~~~~~
ImageBox.java A class that incorrectly tries to load an image and draw an outline around it. The problem is that the size of the image is requested before the image is completely loaded, thus, returning a width and height of -1.
~~~~~~~~~~~~~~~~~~~
import java.applet.Applet;
import java.awt.*;

/** A class that incorrectly tries to load an image and draw an
 *  outline around it. Don't try this at home.
 *
 ********************

public class ImageBox extends Applet {
  private int imageWidth, imageHeight;
  private Image image;

  public void init() {
    String imageName = getParameter("IMAGE");
    if (imageName != null) {
      image = getImage(getDocumentBase(), imageName);
    } else {
      image = getImage(getDocumentBase(), "error.gif");
    }
    setBackground(Color.white);

    // The following is wrong, since the image won't be done
    // loading, and -1 will be returned.
    imageWidth = image.getWidth(this);
    imageHeight = image.getHeight(this);
  }

  public void paint(Graphics g) {
    g.drawImage(image, 0, 0, this);
    g.drawRect(0, 0, imageWidth, imageHeight);
  }
}
>>>>>>>>>>>>>>>>>>
BetterImageBox.java An improved version of ImageBox.java. Here a MediaTracker is used to block (wait till the image is completely loaded) before preceding to determine the image size.
>>>>>>>>>>>>>>>>>>
import java.applet.Applet;
import java.awt.*;

/** This version fixes the problems associated with ImageBox by
 *  using a MediaTracker to be sure the image is loaded before
 *  you try to get its dimensions.
 *
 *********************************

public class BetterImageBox extends Applet {
  private int imageWidth, imageHeight;
  private Image image;

  public void init() {
    String imageName = getParameter("IMAGE");
    if (imageName != null) {
      image = getImage(getDocumentBase(), imageName);
    } else {
      image = getImage(getDocumentBase(), "error.gif");
    }
    setBackground(Color.white);
    MediaTracker tracker = new MediaTracker(this);
    tracker.addImage(image, 0);
    try {
      tracker.waitForAll();
    } catch(InterruptedException ie) {}
    if (tracker.isErrorAny()) {
      System.out.println("Error while loading image");
    }

    // This is safe: image is fully loaded
    imageWidth = image.getWidth(this);
    imageHeight = image.getHeight(this);
  }

  public void paint(Graphics g) {
    g.drawImage(image, 0, 0, this);
    g.drawRect(0, 0, imageWidth, imageHeight);
  }
}
>>>>>>>>>>>>>>>>>
TrackerUtil.java A utility class that lets you load and wait for an image in a single swoop.
>>>>>>>>>>>>>>>>>
import java.awt.*;

/** A utility class that lets you load and wait for an image or
 *  images in one fell swoop. If you are loading multiple
 *  images, only use multiple calls to waitForImage if you
 *  need loading to be done serially. Otherwise, use
 *  waitForImages, which loads concurrently, which can be
 *  much faster.
 *
 *******************

public class TrackerUtil {
  public static boolean waitForImage(Image image, Component c) {
    MediaTracker tracker = new MediaTracker(c);
    tracker.addImage(image, 0);
    try {
      tracker.waitForAll();
    } catch(InterruptedException ie) {}
    if (tracker.isErrorAny()) {
      return(false);
    } else {
      return(true);
    }
  }

  public static boolean waitForImages(Image[] images,
                                      Component c) {
    MediaTracker tracker = new MediaTracker(c);
    for(int i=0; i>>>>>>>>>>>>>>>>>>>>>

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10385
Categories:Programming Code Examples, Java/J2EE/J2ME, Applets and Basic Graphics
Tags:Java/J2EE/J2MEApplets and Basic Graphics
Post Data:2017-01-02 16:04:39

Scrum master vs Product owner

Scrum versus Kanban at scale

LPM — Lean Portfolio Management

Story points: Fibonacci, Poker, Agile

How to Prioritize all the stories using MoSCoW

Driver class that creates three threaded objects (Counter2) that count from 0 to 4. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

Counter2Test.java Driver class that creates three threaded objects (Counter2) that count from 0 to 4. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

Template illustrating the second approach for creating a class with thread behavior. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

Creates and starts three threaded objects #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

Template illustrating the first approach for creating a class with thread behavior. #Programming Code Examples #Java/J2EE/J2ME #Advanced Swing

Pointers #Programming Code Examples #Java/J2EE/J2ME #Ajax

C++ Template Example #Programming Code Examples #Java/J2EE/J2ME #Ajax

Valarray Example #Programming Code Examples #Java/J2EE/J2ME #Ajax

Javascript : Miscellaneous Code #Programming Code Examples #Java/J2EE/J2ME #Ajax

Controlling Image Loading #Programming Code Examples #Java/J2EE/J2ME #Applets and Basic Graphics

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Scrum master vs Product owner

Scrum versus Kanban at scale

LPM — Lean Portfolio Management

Story points: Fibonacci, Poker, Agile

How to Prioritize all the stories using MoSCoW

ValidateNotNullOrEmpty