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How to set a different look and feels to swing components in Java?
The Java Swing allows us to customize the GUI by changing the look and feel(L&F). The look defines the general appearance of components and the feel defines their behavior. L&Fs are subclasses of the LookAndFeel class and each L&F is identified by its fully qualified class name. By default, the L&F is set to the Swing L&F ( Metal L&F)
To set the L&F programmatically, we can call the method setLookAndFeel () of the UIManager class. The call to setLookAndFeel must be done before instantiating any Java Swing class, otherwise, the default Swing L&F will be loaded.
Syntax
public static void setLookAndFeel(LookAndFeel newLookAndFeel) throws UnsupportedLookAndFeelException
Example
import java.awt.*; import java.awt.event.*; import javax.swing.*; public class LookAndFeelTest extends JFrame implements ActionListener { private JRadioButton windows, metal, motif, ; private ButtonGroup bg; public LookAndFeelTest() { setTitle("Look And Feels"); windows = new JRadioButton("Windows"); windows.addActionListener(this); metal = new JRadioButton("Metal"); metal.addActionListener(this); motif = new JRadioButton("Motif"); motif.addActionListener(this); bg = new ButtonGroup(); bg.add(windows); bg.add(metal); bg.add(motif); setLayout(new FlowLayout()); add(windows); add(metal); add(motif); setSize(400, 300); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLocationRelativeTo(null); setVisible(true); } @Override public void actionPerformed(ActionEvent ae) { String LAF; if(ae.getSource() == windows) LAF = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel"; else if(ae.getSource() == metal) LAF = "javax.swing.plaf.metal.MetalLookAndFeel"; else LAF = "com.sun.java.swing.plaf.motif.MotifLookAndFeel"; try { UIManager.setLookAndFeel(LAF); SwingUtilities.updateComponentTreeUI(this); } catch (Exception e) { System.out.println("Error setting the LAF..." + e); } } public static void main(String args[]) { new LookAndFeelTest(); } }
Output
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