Replaces the standard scrollbar UI with a custom one

  

//An example of modifying an existing L&F. 
//This example replaces thestandard scrollbar UI with a custom one.
//

import java.awt.Container;
import java.awt.GridLayout;
import java.io.FileReader;
import java.io.IOException;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;

public class MetalModExample {
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    } catch (Exception e) {
      System.err.println("Metal is not available on this platform?!");
      System.exit(1);
    }
    JComponent before = makeExamplePane();

    UIManager.put("ScrollBarUI", "MyMetalScrollBarUI");

    JComponent after = makeExamplePane();

    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Container c = f.getContentPane();
    c.setLayout(new GridLayout(2, 1, 0, 1));
    c.add(before);
    c.add(after);
    f.setSize(450, 400);
    f.setVisible(true);
  }

  public static JComponent makeExamplePane() {
    JTextArea text = new JTextArea();
    try {
      text.read(new FileReader("MetalModExample.java"), null);
    } catch (IOException ex) {
    }

    JScrollPane scroll = new JScrollPane(text);
    return scroll;
  }
}

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Replaces the standard scrollbar UI with a custom one : UI « Swing JFC « Java

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