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Change Your Java Application Look And Feel

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									Change Your Java Application's Look And Feel
There are various look and feel bundled in the JDK you can choose from. I used to change my look and
feel to almost all of my projects because I don't like the default Metal Look And Feel. Changing your java
look and feel is really easy, with just a chunks of code. Here are the default Look and Feels bundled in
the JDK when you downloaded it: (Note: The Window Title says what Look And Feel it is.)
I highly recommend you to download Eclipse because it is very easy to use and beginners can cope up
with it in just an hour. After you have downloaded Eclipse, fire it up and create new project by going to
File > New > Java Project.
For the Project Name, come up with a good name that describes what your project is. After that, hit Finish
button. Your Project appears at the left side of the Eclipse Window, you should now see your Project
Structure.
Now right click on your new Java Project and select New > Class. Now name your new Class as "Main".
Eclipse then create Main.java file. It should look something like this:
public class Main {

}
Now go ahead and copy the codes below, I will explained it later:
import java.awt.FlowLayout;
import java.awt.Toolkit;

import javax.swing.*

public class Main {
    public Main(){
      JFrame frame = new JFrame("Nimbus Look and Feel");
      setLookAndFeel(frame);
      frame.setLayout(new FlowLayout());
      frame.add(new JButton("JButton"));
      frame.add(new JComboBox(new String[]{"item 1", "item 2", "item 3"}));
      frame.add(new JCheckBox("JCheckBox", true));
      frame.add(new JRadioButton("JRadioButton", true));
      frame.add(new JTextField("text field"));
      frame.add(new JLabel("JLabel"));
      frame.add(new JSpinner());
      JProgressBar bar = new JProgressBar(0, 100);
      bar.setValue(40);
      frame.add(bar);
      frame.add(new JToggleButton("JToggleButton", true));
      frame.setSize(400, 300);
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String args[]){
      new Main();
    }

    public static void setLookAndFeel(JFrame v){
     try{
      System.setProperty("sun.awt.noerasebackground", "true");

UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
     SwingUtilities.updateComponentTreeUI(v);
   }catch(Exception e){
     e.printStackTrace();
   }
 }

}

I assume you are already comfortable with Java Swing API before you change your java look and feel.
As you can see from the code, there's only a single method besides the main method,
namely setLookAndFeel(JFrame v). It has a parameter that accepts a JFrame instance.
The static method of Class System setProperty(String, boolean); has been invoked to prevent the
windows to flick while you are resizing it.
And Class UIManager's setLookAndFeel(String) is responsible for changing the Look And Feel of your
Java Application.
Finally, we make sure that Swing updates our changes so we
invokeSwingUtilities' updateComponentTreeUI(String).

There are 5 Look and Feel Classes in Java. They are:
        1.      javax.swing.plaf.metal.MetalLookAndFeel
        2.      com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel
        3.      com.sun.java.swing.plaf.motif.MotifLookAndFeel
        4.      com.sun.java.swing.plaf.windows.WindowsLookAndFeel
        5.      com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel


You only have to change one line of code, and that is:

UIManager.setLookAndFeel("YOUR PREFERRED LOOK AND FEEL CLASS HERE");

  That's it! :) I will soon post about other Look and Feel that is not part of the JDK. Feel free to ask any
                                questions or suggestions! Thank you for reading.

								
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