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import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
public class Test extends JFrame {
JTextArea text = new JTextArea(10, 40);
public Test() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
text.setLineWrap(true);
text.getDocument().addDocumentListener(new DocumentListener() {
public void showSize(DocumentEvent e) {
System.out.println("Doc size: " + e.getDocument().getLength());
}
public void insertUpdate(DocumentEvent e) {
showSize(e);
}
public void removeUpdate(DocumentEvent e) {
showSize(e);
}
public void changedUpdate(DocumentEvent e) {
showSize(e);
}
});
getContentPane().add(
new JScrollPane(text, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER), BorderLayout.CENTER);
pack();
setSize(200, 200);
}
public static void main(String[] args) {
new Test().setVisible(true);
}
}
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