FileDocCategorySizeDatePackage
DocumentEventDemo.javaAPI DocExample3887Tue Dec 12 18:58:54 GMT 2000None

DocumentEventDemo

public class DocumentEventDemo extends JApplet implements ActionListener

Fields Summary
JTextField
textField
JTextArea
textArea
JTextArea
displayArea
Constructors Summary
Methods Summary
public voidactionPerformed(java.awt.event.ActionEvent e)
Handle button click.

        displayArea.setText("");
        textField.requestFocus();
    
public voidinit()

        JButton button = new JButton("Clear");
        button.addActionListener(this);

        textField = new JTextField(20);
        textField.addActionListener(new MyTextActionListener());
        textField.getDocument().addDocumentListener(new MyDocumentListener());
        textField.getDocument().putProperty("name", "Text Field");

        textArea = new JTextArea();
        textArea.getDocument().addDocumentListener(new MyDocumentListener());
        textArea.getDocument().putProperty("name", "Text Area");

        JScrollPane scrollPane = new JScrollPane(textArea);
        scrollPane.setPreferredSize(new Dimension(200, 75));

        displayArea = new JTextArea();
        displayArea.setEditable(false);
        JScrollPane displayScrollPane = new JScrollPane(displayArea);
        displayScrollPane.setPreferredSize(new Dimension(200, 75));

        JPanel contentPane = new JPanel();
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        contentPane.setLayout(gridbag);

        c.gridx = 0;
        c.gridy = 0;
        c.weightx = 1.0;
        c.fill = GridBagConstraints.HORIZONTAL;
        gridbag.setConstraints(textField, c);
        contentPane.add(textField);

        c.gridx = 0;
        c.gridy = 1;
        c.weightx = 0.0;
        c.gridheight = 2;
        c.fill = GridBagConstraints.BOTH;
        gridbag.setConstraints(scrollPane, c);
        contentPane.add(scrollPane);

        c.gridx = 1;
        c.gridy = 0;
        c.weightx = 1.0;
        c.weighty = 1.0;
        gridbag.setConstraints(displayScrollPane, c);
        contentPane.add(displayScrollPane);

        c.gridx = 1;
        c.gridy = 2;
        c.weightx = 0.0;
        c.gridheight = 1;
        c.weighty = 0.0;
        c.fill = GridBagConstraints.HORIZONTAL;
        gridbag.setConstraints(button, c);
        contentPane.add(button);

        setContentPane(contentPane);