JTextArea

01: // TextAreaDemo.java
02: // Copying selected text from one text area to another.
03: import java.awt.*;
04: import java.awt.event.*;
05: import javax.swing.*;
06: 
07: class TextAreaPanel extends JPanel {
08:    private JTextArea t1, t2;
09:    private JButton copy;
10: 
11:    public TextAreaPanel() 
12:    {
13:       Box b = Box.createHorizontalBox();
14: 
15:       String s = "This is a demo string to\n" +
16:                  "illustrate copying text\n" +
17:                  "from one TextArea to \n" +
18:                  "another TextArea using an\n"+
19:                  "external event\n";
20: 
21:       t1 = new JTextArea( s, 10, 15 );
22:       b.add( new JScrollPane( t1 ) );
23: 
24:       copy = new JButton( "Copy >>>" );
25:       copy.addActionListener(
26:          new ActionListener() {
27:             public void actionPerformed( ActionEvent e )
28:             {
29:                t2.setText( t1.getSelectedText() );
30:             }
31:          }
32:       );
33:       b.add( copy );
34: 
35:       t2 = new JTextArea( 10, 15 );
36:       t2.setEditable( false );
37:       b.add( new JScrollPane( t2 ) );
38:       add(b);
39:    }
40: }
41: 
42: public class TextAreaDemo extends JApplet
43: {
44:     TextAreaPanel panel;
45:     public void init()
46:     {
47:         panel = new TextAreaPanel();
48:         getContentPane().add(panel);
49:     }
50:     
51:     public static void main( String args[] )
52:     {
53:         TextAreaPanel panel = new TextAreaPanel();
54:         JFrame frame = new JFrame("TextArea Demo");
55:         frame.add(panel);
56:         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
57:         frame.pack();
58:         //frame.setSize( 425, 200 );
59:         frame.setVisible(true);
60:    }
61: }