SwingCodeExhibit 
  
//************************************************************************************ 
// The 6 demo classes are lifts from the Magelang Swing Tutorial. They are provided 
// as examples in a collection you can inspect on your computer. Lift the code to an 
// editor compile and run 
//************************************************************************************ 
  

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 
import javax.swing.text.*; 
import javax.swing.border.*; 

//Demo class 1 from Magelang tutorial 

    class RadioButtonPanel extends JPanel { 
    RadioButtonPanel() { 
    // Set the layout to a GridLayout 
    setLayout(new GridLayout(4,1)); 

    // Declare a radio button 
    JRadioButton radioButton; 

    // Instantiate a ButtonGroup for functional 
    // association among radio buttons 
    ButtonGroup rbg = new ButtonGroup(); 

    // Create a label for the group 
    JLabel label = new JLabel("Annual Salary: "); 
    label.setFont(new Font("SansSerif", Font.BOLD, 14)); 
    add(label); 

    // Add a new radio button to the pane 
    radioButton = new JRadioButton("$45,000"); 
    add (radioButton); 
    // set key accelerator 
    radioButton.setMnemonic (KeyEvent.VK_4); 

    // Add the button to the ButtonGroup 
    rbg.add (radioButton); 

    // Set this radio button to be the default 
    radioButton.setSelected(true); 

    // Set up two more radio buttons 
    radioButton = new JRadioButton("$60,000"); 
    radioButton.setMnemonic (KeyEvent.VK_6); 
    add (radioButton); 
    rbg.add (radioButton); 
    radioButton = new JRadioButton("$75,000"); 
    radioButton.setMnemonic (KeyEvent.VK_7); 
    add (radioButton); 
    rbg.add (radioButton); 
  } 
} 

//***************************************** 
// Demo class 2 from swing tutorial 

 class ScrollPanel extends JPanel { 

  public ScrollPanel() {                                                                 // The .gif here may not be visible 
    setLayout(new BorderLayout());                                              // or available to your code so go 
    Icon b = new ImageIcon("Ball_ani.gif");                                   // get one from the OS or the net, 
    JLabel cloudLabel = new JLabel(b);                                        // place it in the directory with 
    JScrollPane scrollPane = new JScrollPane(cloudLabel);           // your source code and make it's 
    add(scrollPane, BorderLayout.CENTER);                               // file name the argument to the 
  }                                                                                               // new ImageIcon( ) constructor 
} 
//***************************************** 
//Demo class 3 

  class TextPanel extends JPanel { 
  public TextPanel() { 
    // Set the layout to a BorderLayout 
    setLayout(new BorderLayout()); 

    // Create the three basic text components 
    JTextField textField = new JTextField("The JTextField"); 
    JTextArea textArea = new JTextArea("The JTextArea.\n The JTextPane" + 
    "below requires you to add a StyledDocument"); 
    JTextPane textPane = new JTextPane(); 

    //Set the textpane's font properties 
    MutableAttributeSet attr = new SimpleAttributeSet(); 
    StyleConstants.setFontFamily(attr, "Serif"); 
    StyleConstants.setFontSize(attr, 18); 
    StyleConstants.setBold(attr, true); 
    textPane.setCharacterAttributes(attr, false); 

    add(textField, BorderLayout.NORTH); 
    add(new JScrollPane(textArea), BorderLayout.CENTER); 
    add(new JScrollPane(textPane), BorderLayout.SOUTH); 
  } 
} 

//*********************************************** 
//demo class 4 

class SliderPanel extends JPanel { 
 public SliderPanel() { 
   setLayout(new BorderLayout()); 
   JSlider slider1 = new JSlider (JSlider.VERTICAL, 0, 100, 50); 
   slider1.setPaintTicks(true); 
   slider1.setMajorTickSpacing(10); 
   slider1.setMinorTickSpacing(2); 
   add(slider1, BorderLayout.EAST); 
   JSlider slider2 = 
   new JSlider (JSlider.VERTICAL, 0, 100, 50); 
   slider2.setPaintTicks(true); 
   slider2.setMinorTickSpacing(5); 
   add(slider2, BorderLayout.WEST); 
   JSlider slider3 =new JSlider (JSlider.HORIZONTAL, 0, 100, 50); 
   slider3.setPaintTicks(true); 
   slider3.setMajorTickSpacing(10); 
   add(slider3, BorderLayout.SOUTH); 
   JSlider slider4 =new JSlider (JSlider.HORIZONTAL, 0, 100, 50); 
   slider4.setBorder(BorderFactory.createLineBorder(Color.blue)); 
   add(slider4, BorderLayout.NORTH); 
    } 
 } 

//****************************************************** 
//demo class 5 

class ComboPanel extends JPanel { 
  String choices[] = { 
  "Mercury", "Venus", "Earth", 
  "Mars", "Jupiter", "Saturn", 
  "Uranus","Neptune", "Pluto"}; 
   public ComboPanel() { 
   JComboBox combo1 = new JComboBox(); 
    combo1.setBorder(new BevelBorder(BevelBorder.RAISED));   //added a border to demo 
   JComboBox combo2 = new JComboBox(); 
    combo2.setBorder(new BevelBorder(BevelBorder.RAISED)); 
    for (int i=0;i<choices.length;i++) { 
     combo1.addItem (choices[i]); 
     combo2.addItem (choices[i]); 
     } 
 combo2.setEditable(true); 
 combo2.setSelectedItem("X"); 
 combo2.setMaximumRowCount(4); 
 add(combo1); 
 add(combo2); 
 } 
} 

public class JF extends JFrame{ 
public static void main(String args[]){ 
JF jf=new JF(); 
jf.getContentPane().setLayout(new GridLayout(3,2,5,5)); 

//**************************************** // Note Just as an example,class PasswordPanel is 
//Demo class 6 from swing tutorial                               // placed inside JF becoming an inner class You'll 
                                                                                  // note it compiles to a class file beginning with 
                                                                                  // a dollar sign 

class PasswordPanel extends JPanel { 
 PasswordPanel() { 
 JPasswordField pass1 = new JPasswordField(20); 
 JPasswordField pass2 = new JPasswordField(20); 
 pass2.setEchoChar ('?'); 
 add(pass1); 
 add(pass2); 
 } 
} 
//******************************************* 

RadioButtonPanel rbp=new RadioButtonPanel(); 
jf.getContentPane().add(rbp); 

ScrollPanel sp=new ScrollPanel(); 
jf.getContentPane().add(sp); 

TextPanel tp=new TextPanel(); 
jf.getContentPane().add(tp); 

PasswordPanel pwp=new PasswordPanel(); 
jf.getContentPane().add(pwp); 

SliderPanel sdp=new SliderPanel(); 
jf.getContentPane().add(sdp); 

ComboPanel cp=new ComboPanel(); 
jf.getContentPane().add(cp); 
  

jf.setSize(600,500); 
jf.setVisible(true); 

jf.addWindowListener(new WindowAdapter(){                // an anonymous inner class at it's best 
      public void windowClosing(WindowEvent we){          // eliminates closing dos with 'Ctrl-c' 
      System.exit(0); 
      } 
  }); 
  }