This example displays the programming details of each of the above GUI's, with snapshots of the output. The program source must be saved under the name of GUIdemo.java for the compiler to work properly.
// This program was condensed from Chapter 13: Graphics demonstration of the book
// Java, How to programme, fifth edition, by Deitel and Deitel. (Prentice Hall)
// ISBN 0-13-101621-0
//
import java.awt.*;
import java.awt.event.*;
import java.awt.GraphicsEnvironment.*;
import javax.swing.*;
class GUIclass extends JFrame{
public static int win[]={0,0,0,0,0,0,0,0,0};
JLabel lText,lIcon,lIconText; // 0. labels
JTextField f1,f2,f3,fFont; // 1. textFields
JPasswordField f4; // passwordField
JButton b0,b1,b2,b3,b4,b5; // 2. buttons
JCheckBox cbBold,cbItalic; // 3. checkboxes & radio buttons
JComboBox coImage; // 4. comboBoxes
JList lColour,lCopy; // 5. JList
JRadioButton rb1,rb2,rb3; // Selection modes
JButton bCopy;
CheckBoxHandler cbh=new CheckBoxHandler();
ButtonHandler bh=new ButtonHandler();
JRadioButton rbSerif,rbHelvetica,rbCourier;
ButtonGroup rbGroup=new ButtonGroup();
String names[]={"f1.gif","f2.gif","f3.gif"};
Icon icons[]={new ImageIcon(names[0]),new ImageIcon(names[1]),new ImageIcon(names[2])};
String last="";
public GUIclass (int nType, String sTitle, int l1, int l2, int s1, int s2){
super(sTitle);
// GUI Stuff
Container c=getContentPane();
c.setLayout(new FlowLayout());
switch(nType){
case 0: // labels
lText=new JLabel("Text Label");
lText.setToolTipText("Label with text only");
c.add(lText);
Icon button=new ImageIcon("button.gif");
// note: this cute button was borrowed from Internet temporary files
// source is unfortunately unknown
lIcon=new JLabel("animated button",button,SwingConstants.LEFT);
lIcon.setToolTipText("Label with text left and Icon");
// c.add(lIcon); // undelete this line to show label
lIconText=new JLabel(); // add details later
lIconText.setText("Icon+text bottom");
lIconText.setIcon(button);
lIconText.setHorizontalTextPosition(SwingConstants.CENTER);
lIconText.setVerticalTextPosition(SwingConstants.BOTTOM);
lIconText.setToolTipText("Label with Icon and text at bottom");
c.add(lIconText);
win[0]=1;
break;
case 1: // textfields
f1=new JTextField("Uneditable");
f1.setEditable(false);
f2=new JTextField(10); // field with 10 spaces
f3=new JTextField("Enter Text"); // field with initial text
f4=new JPasswordField("Hidden");
c.add(f1);c.add(f2);c.add(f3);c.add(f4);
// now register event handlers
TextFieldHandler h=new TextFieldHandler();
f2.addActionListener(h);
f3.addActionListener(h);
f4.addActionListener(h);
//out.append("1. uneditable textField\n2. normal textField\n3. textField with default text\n4. password textField");
win[1]=1;
break;
case 2: // buttons are used to call up different elements
//ButtonHandler bh=new ButtonHandler();
b0=new JButton("JLabels"); c.add(b0);
b1=new JButton("JTextFields"); c.add(b1);
b3=new JButton("chkBoxes+radio btns"); c.add(b3);
b4=new JButton("JcomboBoxs"); c.add(b4);
b5=new JButton("JLists"); c.add(b5);
b0.addActionListener(bh);
b1.addActionListener(bh);
b3.addActionListener(bh);
b4.addActionListener(bh);
b5.addActionListener(bh);
win[2]=1;
break;
case 3: // check-boxes and radio buttons
f1=new JTextField(30);
f1.setText("Select Font");
f1.setFont(new Font("Serif",Font.PLAIN,14));
f1.setEditable(false);
c.add(f1);
// checkboxes
cbBold=new JCheckBox("bold"); c.add(cbBold);
cbItalic=new JCheckBox("italic"); c.add(cbItalic);
//CheckBoxHandler cbh=new CheckBoxHandler();
cbBold.addItemListener(cbh);
cbItalic.addItemListener(cbh);
// radiobuttons
rbSerif=new JRadioButton("Times",true); c.add(rbSerif);
rbHelvetica=new JRadioButton("Helvetica",false); c.add(rbHelvetica);
rbCourier=new JRadioButton("Courrier",false); c.add(rbCourier);
//rbGroup=new ButtonGroup();
rbGroup.add(rbSerif);
rbGroup.add(rbHelvetica);
rbGroup.add(rbCourier);
rbSerif.addItemListener(new RadioButtonHandler());
rbHelvetica.addItemListener(new RadioButtonHandler());
rbCourier.addItemListener(new RadioButtonHandler());
// Font size
lText=new JLabel("Font Size="); c.add(lText);
fFont=new JTextField(5); c.add(fFont);
fFont.addActionListener(new TextFieldHandler());
win[3]=1;
break;
case 4: // JComboBox
coImage=new JComboBox(names);
coImage.setMaximumRowCount(3);
coImage.addItemListener(
new ItemListener(){
public void itemStateChanged(ItemEvent e){
if(e.getStateChange()==ItemEvent.SELECTED)lIcon.setIcon(icons[coImage.getSelectedIndex()]);
}
}
);
c.add(coImage);
lIcon=new JLabel(icons[0]);
c.add(lIcon);
break;
case 5: // JList
String colours[]={"RED","GREEN","BLUE","BLACK","WHITE","PINK","ORANGE","CYAN","MAGENTA","YELLOW","GRAY"};
lColour=new JList(colours);
lColour.setVisibleRowCount(colours.length);
c.add(new JScrollPane(lColour));
rb1=new JRadioButton("Single",true); c.add(rb1);
rb2=new JRadioButton("Sing-Interval",false); c.add(rb2);
rb3=new JRadioButton("Mult-Interval",false); c.add(rb3);
rbGroup.add(rb1); rbGroup.add(rb2); rbGroup.add(rb3);
rb1.addItemListener(cbh);
rb2.addItemListener(cbh);
rb3.addItemListener(cbh);
bCopy=new JButton("COPY"); c.add(bCopy);
bCopy.addActionListener(bh);
lCopy=new JList();
lCopy.setVisibleRowCount(5);
lCopy.setFixedCellWidth(100);
lCopy.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
c.add(new JScrollPane(lCopy));
break;
}
setLocation(l1,l2);
setSize(s1,s2);
setVisible(true);
}
int getFontSize(){
int nFont=0;
try{
nFont=Integer.parseInt(fFont.getText());
}
catch(Exception e){ nFont=14;}
if(nFont<10)nFont=10; if(nFont>30)nFont=30;
return nFont;
}
private class TextFieldHandler implements ActionListener{
// innerclass TextField Handler
public void actionPerformed(ActionEvent e){
String msg="Text entered : ";
if(e.getSource()==fFont){
f1.setFont(new Font(f1.getFont().getFamily(),f1.getFont().getStyle(),getFontSize()));
return;
}
if(e.getSource()==f2)msg+=e.getActionCommand();
else if(e.getSource()==f3)msg+=e.getActionCommand();
else if(e.getSource()==f4)msg+=e.getActionCommand();
JOptionPane.showMessageDialog(null,msg);
}
}
private class ButtonHandler implements ActionListener{
// innerclass ButtonHandler
public void actionPerformed(ActionEvent e){
if(e.getSource()==b0&&win[0]==0){
GUIclass g0=new GUIclass(0,"Labels",0,0,350,120);
} else if(e.getSource()==b1&&win[1]==0){
GUIclass g1=new GUIclass(1,"TextFields",50,50,350,100);
} else if(e.getSource()==b3&&win[3]==0){
GUIclass g3=new GUIclass(3,"CheckBoxes & Radio Buttons",150,150,350,150);
}else if(e.getSource()==b4&&win[4]==0){
GUIclass g4=new GUIclass(4,"ComboBoxes",200,200,350,180);
}else if(e.getSource()==b5&&win[5]==0){
GUIclass g5=new GUIclass(5,"JList",250,250,350,400);
}else if(e.getSource()==bCopy){ // copy colours
lCopy.setListData(lColour.getSelectedValues());
}
}
}
private class CheckBoxHandler implements ItemListener{
// innerclass CheckBoxHandler
private int iBold=Font.PLAIN;
private int iItalic=Font.PLAIN;
public void itemStateChanged(ItemEvent e){
if(e.getSource()==cbBold||e.getSource()==cbItalic){
// Radio Buttons and CheckBoxes
iBold=(cbBold.isSelected())?Font.BOLD:Font.PLAIN;
iItalic=(cbItalic.isSelected())?Font.ITALIC:Font.PLAIN;
f1.setFont(new Font(f1.getFont().getFamily(),iBold+iItalic, getFontSize()));
}
}
}
private class RadioButtonHandler implements ItemListener{
// innerclass RadioButtonHandler
public void itemStateChanged(ItemEvent e){
if(e.getSource()==rbSerif||e.getSource()==rbHelvetica||e.getSource()==rbCourier){
String Fam="";
if(e.getSource()==rbSerif)Fam="Serif";
else if(e.getSource()==rbHelvetica)Fam="Helvetica";
else if(e.getSource()==rbCourier)Fam="Courier";
f1.setFont(new Font(Fam,f1.getFont().getStyle(),getFontSize()));
} else if(e.getSource()==rb1||e.getSource()==rb2||e.getSource()==rb3){
// JList
int sMode=0;
if(rb1.isSelected())sMode=ListSelectionModel.SINGLE_SELECTION;
else if(rb2.isSelected())sMode=ListSelectionModel.SINGLE_INTERVAL_SELECTION;
else sMode=ListSelectionModel.MULTIPLE_INTERVAL_SELECTION;
lColour.setSelectionMode(sMode);
}
}
}
}
public class GUIDemo{
public static void main(String[] args){
String sType[]={"Labels","TextFields","Buttons"};
GUIclass g2=new GUIclass(2,sType[2],100,100,350,150);// buttons
}
}