May 02

BGColor.jsp Page that demonstrates JSP scriptlets. Uses the JSP-Styles style sheet. #Programming Code Examples #Java/J2EE/J2ME #JSP

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

BGColor.jsp  Page that demonstrates JSP scriptlets. Uses the JSP-Styles  style sheet.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!--    
Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
  <TITLE>Color Testing</TITLE>
</HEAD>
<% 
String bgColor = request.getParameter("bgColor");
boolean hasExplicitColor = true;
if (bgColor == null) {
  hasExplicitColor = false;
  bgColor = "WHITE";
} 
%>
<BODY BGCOLOR="<%= bgColor %>">
<H2 ALIGN="CENTER">Color Testing</H2>
<%
if (hasExplicitColor) {
  out.println("You supplied an explicit background color of " +
              bgColor + ".");
} else {
  out.println("Using default background color of WHITE. " +
              "Supply the bgColor request attribute to try " +
              "a standard color or RRGGBB value, or to see " +
              "if your browser supports X11 color names.");
}
%>
</BODY>
</HTML>

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10256
Categories:Programming Code Examples, Java/J2EE/J2ME, JSP
Tags:Java/J2EE/J2MEJSP
Post Data:2017-01-02 16:04:28

Shop Online: https://www.ShopForSoul.com/
(Big Data, Cloud, Security, Machine Learning): Courses: http://Training.SitesTree.com
In Bengali: http://Bangla.SaLearningSchool.com
http://SitesTree.com
8112223 Canada Inc./JustEtc: http://JustEtc.net (Software/Web/Mobile/Big-Data/Machine Learning)
Shop Online: https://www.ShopForSoul.com/
Medium: https://medium.com/@SayedAhmedCanada

May 02

Index funds are the answer for most investors

By Sayed in ব্লগ । Blog

https://www.bloomberg.com/news/articles/2021-05-02/warren-buffett-tech-shares-are-bargain-stock-picking-is-hard-buy-index-funds?srnd=premium-canada

"Index funds are the answer for most investors. The fact that it’s so hard to predict what kind of tremendous change there will be in the world is a great argument for diversified index funds, Buffett said.
The billionaire has advised the trustee of his will that when he passes, 90% of his bequest to his wife — now in Berkshire stock — should be in a stock index fund like the S&P 500, and 10% in Treasury bills."

May 02

Bandits and #Reinforcement Learning Course

By Sayed in ব্লগ । Blog

Best Multi-Armed Bandit Strategy? (feat: UCB Method)

https://www.youtube.com/watch?v=FgmMK6RPU1c

Reinforcement Learning: Complete Course:
https://www.youtube.com/watch?v=4SLGEq_HZxk&list=PLnn6VZp3hqNvRrdnMOVtgV64F_O-61C1D

From the Book by Sutton: http://incompleteideas.net/book/RLbook2018.pdf

https://web.stanford.edu/class/psych209/Readings/SuttonBartoIPRLBook2ndEd.pdf

Just did a google search, and I see that the algorithms from the book are implemented and provided at:

https://github.com/LyWangPX/Reinforcement-Learning-2nd-Edition-by-Sutton-Exercise-Solutions

Article:

https://towardsdatascience.com/a-comparison-of-bandit-algorithms-24b4adfcabb

May 01

Expressions.jsp Page that demonstrates JSP expressions. Uses the JSP-Styles style sheet. #Programming Code Examples #Java/J2EE/J2ME #JSP

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

Expressions.jsp  Page that demonstrates JSP expressions. Uses the JSP-Styles  style sheet. 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- 
Example of JSP Expressions. 
   
Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>JSP Expressions</TITLE>
<META NAME="keywords"
      CONTENT="JSP,expressions,JavaServer,Pages,servlets">
<META NAME="description"
      CONTENT="A quick example of JSP expressions.">
<LINK REL=STYLESHEET
      HREF="JSP-Styles.css"
      TYPE="text/css">
</HEAD>

<BODY>
<H2>JSP Expressions</H2>
<UL>
  <LI>Current time: <%= new java.util.Date() %>
  <LI>Your hostname: <%= request.getRemoteHost() %>
  <LI>Your session ID: <%= session.getId() %>
  <LI>The <CODE>testParam</CODE> form parameter:
      <%= request.getParameter("testParam") %>
</UL>
</BODY>
</HTML>

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10213
Categories:Programming Code Examples, Java/J2EE/J2ME, JSP
Tags:Java/J2EE/J2MEJSP
Post Data:2017-01-02 16:04:23

May 01

Simplifies the setting of native look and feel #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

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

WindowUtilities.java Simplifies the setting of native look and feel. 
####################
import javax.swing.*;
import java.awt.*;   // For Color and Container classes.

/** A few utilities that simplify using windows in Swing. 
 *
###################

public class WindowUtilities {

  /** Tell system to use native look and feel, as in previous
   *  releases. Metal (Java) LAF is the default otherwise.
   */

  public static void setNativeLookAndFeel() {
    try {
     UIManager.setLookAndFeel(
       UIManager.getSystemLookAndFeelClassName());
    } catch(Exception e) {
      System.out.println("Error setting native LAF: " + e);
    }
  }

  public static void setJavaLookAndFeel() {
    try {
     UIManager.setLookAndFeel(
       UIManager.getCrossPlatformLookAndFeelClassName());
    } catch(Exception e) {
      System.out.println("Error setting Java LAF: " + e);
    }
  }

   public static void setMotifLookAndFeel() {
    try {
      UIManager.setLookAndFeel(
        "com.sun.java.swing.plaf.motif.MotifLookAndFeel");
    } catch(Exception e) {
      System.out.println("Error setting Motif LAF: " + e);
    }
  }

  /** A simplified way to see a JPanel or other Container. Pops
   *  up a JFrame with specified Container as the content pane.
   */

  public static JFrame openInJFrame(Container content,
                                    int width,
                                    int height,
                                    String title,
                                    Color bgColor) {
    JFrame frame = new JFrame(title);
    frame.setBackground(bgColor);
    content.setBackground(bgColor);
    frame.setSize(width, height);
    frame.setContentPane(content);
    frame.addWindowListener(new ExitListener());
    frame.setVisible(true);
    return(frame);
  }

  /** Uses Color.white as the background color. */

  public static JFrame openInJFrame(Container content,
                                    int width,
                                    int height,
                                    String title) {
    return(openInJFrame(content, width, height,
                        title, Color.white));
  }

  /** Uses Color.white as the background color, and the
   *  name of the Container's class as the JFrame title.
   */

  public static JFrame openInJFrame(Container content,
                                    int width,
                                    int height) {
    return(openInJFrame(content, width, height,
                        content.getClass().getName(),
                        Color.white));
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10355
Categories:Programming Code Examples, Java/J2EE/J2ME, Layout Managers
Tags:Java/J2EE/J2MELayout Managers
Post Data:2017-01-02 16:04:35

May 01

Placement of buttons in a BoxLayout using rigid areas, struts, and glue #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

By Sayed in FromSitesTree.com, Struts

###############
InvisibleComponentTest.java Placement of buttons in a BoxLayout using rigid areas, struts, and glue
###############
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;

/** Example of using rigid areas, struts, and glue to
 *  produce the effect of invisible components.
 *
 ******************

public class InvisibleComponentTest extends JPanel {
  Component spacer;

  public InvisibleComponentTest() {
    setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));

    // Place a rigid invisible component 25 pixels wide and
    // 75 pixels tall between the two buttons
    JPanel p1= new JPanel();
    spacer = Box.createRigidArea(new Dimension(20,75));
    setUpPanel(p1, "Rigid Area - 20x75 pixels", spacer);

    // Separate two buttons by a 60-pixel horizontal strut
    JPanel p2= new JPanel();
    spacer = Box.createHorizontalStrut(60);
    setUpPanel(p2, "Horizontal Strut - 60 pixels", spacer);

    // Horizontal glue in FlowLayout - not useful
    JPanel p3= new JPanel();
    spacer = Box.createHorizontalGlue();
    setUpPanel(p3, "Horizontal Glue - FlowLayout", spacer);

    // Add glue to fill all remaining horizontal space between
    // the two buttons. Glue not supported by default FlowLayout
    // of JPanel.  Change layout of JPanel to BoxLayout.
    JPanel p4= new JPanel();
    p4.setLayout(new BoxLayout(p4,BoxLayout.X_AXIS));
    spacer = Box.createHorizontalGlue();
    setUpPanel(p4, "Horizontal Glue - BoxLayout", spacer);

    add(p1);
    add(p2);
    add(p3);
    add(p4);
  }

  // Helper to set the border and add components
  private void setUpPanel(JPanel p, String title,
                          Component spacer) {
    p.setBorder(BorderFactory.createTitledBorder(
                       BorderFactory.createEtchedBorder(),title,
                       TitledBorder.TOP,TitledBorder.CENTER));
    p.setBackground(Color.white);
    p.add(new JButton("Left"));
    p.add(spacer);
    p.add(new JButton("Right"));
  }

  public static void main(String[] args) {
    String title = "Using Invisible Components";
    WindowUtilities.setNativeLookAndFeel();
    WindowUtilities.openInJFrame(new InvisibleComponentTest(),
                                 350, 325, title);
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10354
Categories:Programming Code Examples, Java/J2EE/J2ME, Layout Managers
Tags:Java/J2EE/J2MELayout Managers
Post Data:2017-01-02 16:04:35

May 01

java Nested container where the top-level panels are positioned by hand #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

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

######################
ButtonCol.java Nested container where the top-level panels are positioned by hand
######################
import java.applet.Applet;
import java.awt.*;

/** An example of a layout performed manually. The top-level
 *  panels are positioned by hand, after you determine the size
 *  of the applet. Since applets can't be resized in most
 *  browsers, setting the size once when the applet is created
 *  is sufficient.
 *
 ***************************

public class ButtonCol extends Applet {
  public void init() {
    setLayout(null);
    int width1 = getSize().width*4/10,
        width2 = getSize().width - width1,
        height = getSize().height;
    Panel buttonPanel = new Panel();
    buttonPanel.setBounds(0, 0, width1, height);
    buttonPanel.setLayout(new GridLayout(6, 1));
    buttonPanel.add(new Label("Buttons", Label.CENTER));
    buttonPanel.add(new Button("Button One"));
    buttonPanel.add(new Button("Button Two"));
    buttonPanel.add(new Button("Button Three"));
    buttonPanel.add(new Button("Button Four"));
    buttonPanel.add(new Button("Button Five"));
    add(buttonPanel);
    Panel everythingElse = new Panel();
    everythingElse.setBounds(width1+1, 0, width2, height);
    everythingElse.add(new Label("Everything Else"));
    add(everythingElse);
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10353
Categories:Programming Code Examples, Java/J2EE/J2ME, Layout Managers
Tags:Java/J2EE/J2MELayout Managers
Post Data:2017-01-02 16:04:35

May 01

Layout of complicated GUI by taking advantage of nested containers #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

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

#################
NestedLayout.java Layout of complicated GUI by taking advantage of nested containers. Uses WindowUtilities.java and ExitListener.java. 
##################
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;

/** An example demonstrating the use of nested containers
 *  to lay out the components. See GridBagTest.java for
 *  implementation by a single layout manager, GridBagLayout.
 *
 *******************
 */

public class NestedLayout extends JPanel {

  private JTextArea textArea;
  private JButton bSaveAs, bOk, bExit;
  private JTextField fileField;

  public NestedLayout() {

    setLayout(new BorderLayout(2,2));
    setBorder(BorderFactory.createEtchedBorder());

    textArea = new JTextArea(12,40);  // 12 rows, 40 cols
    bSaveAs = new JButton("Save As");
    fileField = new JTextField("C:Document.txt");
    bOk = new JButton("OK");
    bExit = new JButton("Exit");

    add(textArea,BorderLayout.CENTER);

    // Set up buttons and textfield in bottom panel.
    JPanel bottomPanel = new JPanel();
    bottomPanel.setLayout(new GridLayout(2,1));

    JPanel subPanel1 = new JPanel();
    JPanel subPanel2 = new JPanel();
    subPanel1.setLayout(new BorderLayout());
    subPanel2.setLayout(new FlowLayout(FlowLayout.RIGHT,2,2));

    subPanel1.add(bSaveAs,BorderLayout.WEST);
    subPanel1.add(fileField,BorderLayout.CENTER);
    subPanel2.add(bOk);
    subPanel2.add(bExit);

    bottomPanel.add(subPanel1);
    bottomPanel.add(subPanel2);

    add(bottomPanel,BorderLayout.SOUTH);
  }

  public static void main(String[] args) {
    WindowUtilities.setNativeLookAndFeel();
    JFrame frame = new JFrame("Nested Containers");
    frame.setContentPane(new NestedLayout());
    frame.addWindowListener(new ExitListener());
    frame.pack();
    frame.setVisible(true);
  }
}
##########################

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017

From: http://sitestree.com/?p=10352
Categories:Programming Code Examples, Java/J2EE/J2ME, Layout Managers
Tags:Java/J2EE/J2MELayout Managers
Post Data:2017-01-02 16:04:35

May 01

Explicit placement of five buttons with the layout manager turned off #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

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

NullTest.java Explicit placement of five buttons with the layout manager turned off (set to null)
##########################
import java.applet.Applet;
import java.awt.*;

/** Layout managers are intended to help you, but there
 *  is no law saying you have to use them.
 *  Set the layout to null to turn them off.
 *
*******************
public class NullTest extends Applet {
  public void init() {
    setLayout(null);
    Button b1 = new Button("Button 1");
    Button b2 = new Button("Button 2");
    Button b3 = new Button("Button 3");
    Button b4 = new Button("Button 4");
    Button b5 = new Button("Button 5");
    b1.setBounds(0, 0, 150, 50);
    b2.setBounds(150, 0, 75, 50);
    b3.setBounds(225, 0, 75, 50);
    b4.setBounds(25, 60, 100, 40);
    b5.setBounds(175, 60, 100, 40);
    add(b1);
    add(b2);
    add(b3);
    add(b4);
    add(b5);
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10351
Categories:Programming Code Examples, Java/J2EE/J2ME, Layout Managers
Tags:Java/J2EE/J2MELayout Managers
Post Data:2017-01-02 16:04:35

May 01

A textfield and three buttons arranged by a verticle BoxLayout #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

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

BoxLayoutTest.java A textfield and three buttons arranged by a verticle BoxLayout. Uses WindowUtilities.java and ExitListener.java. 
##################
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/** An example of BoxLayout.
 *
 ***********

public class BoxLayoutTest extends JPanel
                           implements ActionListener{
  BoxLayout layout;
  JButton topButton, middleButton, bottomButton;

  public BoxLayoutTest() {
    layout = new BoxLayout(this, BoxLayout.Y_AXIS);
    setLayout(layout);

    JLabel label = new JLabel("BoxLayout Demo");

    topButton = new JButton("Left Alignment");
    middleButton = new JButton("Center Alignment");
    bottomButton = new JButton("Right Alignment");
    topButton.addActionListener(this);
    middleButton.addActionListener(this);
    bottomButton.addActionListener(this);

    add(label);
    add(topButton);
    add(middleButton);
    add(bottomButton);
    setBackground(Color.white);
  }

  public void actionPerformed(ActionEvent event) {
    if (event.getSource() == topButton) {
      refresh(Component.LEFT_ALIGNMENT);
    } else if (event.getSource() == middleButton) {
      refresh(Component.CENTER_ALIGNMENT);
    } else if (event.getSource() == bottomButton) {
      refresh(Component.RIGHT_ALIGNMENT);
    }
  }

  private void refresh(float alignment){
    topButton.setAlignmentX(alignment);
    middleButton.setAlignmentX(alignment);
    bottomButton.setAlignmentX(alignment);
    revalidate();
    System.out.println("x: "+layout.getLayoutAlignmentX(this));
  }

  public static void main(String[] args) {
    WindowUtilities.setNativeLookAndFeel();
    WindowUtilities.openInJFrame(new BoxLayoutTest(), 300, 135,
                                 "BoxLayoutTest");
  }
}

Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017

From: http://sitestree.com/?p=10350
Categories:Programming Code Examples, Java/J2EE/J2ME, Layout Managers
Tags:Java/J2EE/J2MELayout Managers
Post Data:2017-01-02 16:04:35

Understanding the Hierarchical DNS System: Domains, Subdomains, and FQDNs

DNS Hierarchy with a Domain Name

How DNS Names Work: Example with chat.811tech.ca

What Does “Namespace” Mean in DNS?

How a DNS Request Travels Across Networks

BGColor.jsp Page that demonstrates JSP scriptlets. Uses the JSP-Styles style sheet. #Programming Code Examples #Java/J2EE/J2ME #JSP

Index funds are the answer for most investors

Bandits and #Reinforcement Learning Course

Best Multi-Armed Bandit Strategy? (feat: UCB Method)

Expressions.jsp Page that demonstrates JSP expressions. Uses the JSP-Styles style sheet. #Programming Code Examples #Java/J2EE/J2ME #JSP

Simplifies the setting of native look and feel #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

Placement of buttons in a BoxLayout using rigid areas, struts, and glue #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

java Nested container where the top-level panels are positioned by hand #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

Layout of complicated GUI by taking advantage of nested containers #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

Explicit placement of five buttons with the layout manager turned off #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

A textfield and three buttons arranged by a verticle BoxLayout #Programming Code Examples #Java/J2EE/J2ME #Layout Managers

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Grid

Understanding the Hierarchical DNS System: Domains, Subdomains, and FQDNs

DNS Hierarchy with a Domain Name

How DNS Names Work: Example with chat.811tech.ca

What Does “Namespace” Mean in DNS?

How a DNS Request Travels Across Networks

Explain DNS