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Java -Swing
Creating Windows & Applets
(lectures programs)
Sun OnLine Documentations
Sun Swing Tutorial
Buttons: Show a variety of buttons.
To run, we may use one of the following methods:
¾ % appletviewer Buttons.java
¾ % appletviewer ButtonsFrame.html
¾ % java Buttons
¾ Use any internet browser and open: ButtonsFrame.html
BASIC COMPONENTS
¾ Buttons
JButton b1 = new JButton("Button 1"); b1.setBackground(Color.red); b2.setEnabled(false);
¾ Lables
JLabel labl1 = new JLabel("TextField t1"); labl1.setText("Hello");
¾ TextFields
JTextField t1 = new JTextField(30);
String s = new String(); s = t1.getText(); s = t1.getSelectedText(); t1.setText(" ");
¾ TextAreas
JTextArea t = new JTextArea(5, 20); t.setText(t.getText()+ "Old Dominion University \n");
¾ CheckBoxs
JCheckBox cb1 = new JCheckBox("Check Box 1"); if(cb.isSelected()) ..
¾ RadioButtons
ButtonGroup g = new ButtonGroup(); JRadioButton rb1 = new JRadioButton("one", false); g.add(rb1);
¾ ComboBoxes
JComboBox c = new JComboBox(); c.addItem(description[count++]); c.getSelectedIndex(); c.getSelectedItem());
¾ Lists
DefaultListModel lItems=new DefaultListModel(); JList lst = new JList(lItems); lItems.addElement(flavors[count++]); Object[] items=lst.getSelectedValues();
¾ Borders
JPanel jp = new JPanel(); Border b = new TitledBorder("Title");
JOptionPane.showMessageDialog(null, "There's a bug on you!", "Message(Alert)!", JOptionPane.ERROR_MESSAGE);
int answer = JOptionPane.showConfirmDialog(null, "Quit? ", "Confirm(Yes/NO”", JOptionPane.YES_NO_OPTION);
int sel = JOptionPane.showOptionDialog(null, "Choose a Color!", "Option(Color)", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);
String val = JOptionPane.showInputDialog("How many fingers do you see?");
¾ Menus
JMenuBar mb1 = new JMenuBar(); JMenu m = new JMenu("Flavors"); JMenuItem mi = new JMenuItem(flavors[i]); m.add(mi); mb1.add(m); setJMenuBar(mb1);
¾ Popup
JPopupMenu popup = new JPopupMenu(); JMenuItem mi = new JMenuItem(flavors[i]); popup.add(mi);
... popup.show(.. .);
Converting Applications to Applets
Application:
class A {} class B {}
public class FileName {
public static void main(String[] args) { }
Applete:
//
import com.bruceeckel.swing.;*
// make sure to modify CLASSPATH // e.g., in file .cshrc in UNIX, to include where this package is // e.g., in UNIX /home/cs476/java/ThinkingInJava.2ndEditionR12/code
other imports....;
public class FileName extends JApplet { JTextArea Xout = new JTextArea(10, 30); public void init() { Container cp = getContentPane(); cp.setLayout(new FlowLayout()); cp.add(new JLabel("FileName")); cp.add(new JScrollPane(Xout));
Anywhere inside the code of main or any other class: replace: System.out.println("string"); with: Xout.append("string"); }
class A { } class B { } public static void main(String[] args) { Console.run(new FileName(), 350, 250);
