Rahul
Posts: 52
Nickname: wildhorse
Registered: Oct, 2002
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Re: Help with code modification
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Posted: Apr 11, 2003 12:35 AM
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I've modified your program slightly
Declare: JTextField txtField
instantiate: txtField = new JTextField("");
add to container: c.add(txtField, BorderLayout.NORTH);
// commented out the button code (Look and Feel=)
fillin the text field: txtField.setText(strPLAF);
Check the relevant portions of the program:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class TestChangePLAF extends JFrame {
private JLabel label;
JButton btnMetal, btnWindows, btnMotif;
JTextField txtField;
TestChangePLAF app;
public static void main( String args[]) {
TestChangePLAF app = new TestChangePLAF();
app.app = app;
app.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
app.pack();
app.setVisible(true);
}
public TestChangePLAF() {
Container c = getContentPane();
c.setLayout(new BorderLayout());
ActionListener pl = new ActionListener() {
public void actionPerformed(ActionEvent e) {
String strPLAF = new String();
try {
String s = e.getActionCommand();
System.out.println(s);
if (s.equals("Metal")) {
strPLAF = "javax.swing.plaf.metal.MetalLookAndFeel";
} else if (s.equals("Windows")) {
strPLAF = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
} else if (s.equals("Motif")) {
strPLAF = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
}
txtField.setText(strPLAF);
UIManager.setLookAndFeel(strPLAF);
SwingUtilities.updateComponentTreeUI(app);
app.pack();
} catch (Exception e2) {
e2.printStackTrace(System.err);
}
}
};
btnMetal = new JButton("Metal");
btnMetal.addActionListener(pl);
btnWindows = new JButton("Windows");
btnWindows.addActionListener(pl);
btnMotif = new JButton("Motif");
btnMotif.addActionListener(pl);
txtField = new JTextField("");
//c.add(new JButton("Look and Feel ="), BorderLayout.NORTH);
c.add(txtField, BorderLayout.NORTH);
// c.add(new JButton("South"), BorderLayout.SOUTH);
c.add(btnMetal, BorderLayout.EAST);
c.add(btnWindows, BorderLayout.CENTER);
c.add(btnMotif, BorderLayout.WEST);
}
}
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