JSilder Transparan Java Swing

ClSliderTransparan.java

import java.awt.AlphaComposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JSlider;

@SuppressWarnings("serial")
public class ClSliderTransparan extends JSlider 
{
	
    public ClSliderTransparan() 
    {
        setOpaque(false);
    }
    
    @Override
    public void paint(Graphics g) 
    {
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setComposite(AlphaComposite.SrcOver.derive(0.5f));
        super.paint(g2d);
        g2d.dispose();
    }

    @Override
    protected void paintComponent(Graphics g) 
    {
        
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setColor(getBackground());
        g2d.fillRect(0, 0, getWidth(), getHeight());
        g2d.dispose();

        super.paintComponent(g);
    }

}

frameJSliderTransparan.java

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
import javax.swing.JSlider;
import javax.swing.SwingConstants;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import java.awt.Font;
import java.awt.Color;

@SuppressWarnings("serial")
public class frameJSliderTransparan extends JFrame
{

	private JPanel contentPane;
	private JSlider sliderCPU;
	private JLabel lblRam;
	private JLabel lblCPU;
	private JSlider sliderRAM;
	private JLabel lblOverclock;
	private JLabel lblWall;

	/**
	 * Create the frame.
	 */
	public frameJSliderTransparan() {
		setTitle("JSlider Transparan");
		setResizable(false);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 645, 410);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		
		sliderCPU = new ClSliderTransparan();
		sliderCPU.setOrientation(SwingConstants.VERTICAL);
		sliderCPU.setForeground(new Color(0, 0, 0));
		sliderCPU.setFont(new Font("Comic Sans MS", Font.BOLD, 14));
		sliderCPU.setSnapToTicks(true);
		sliderCPU.setMaximum(7);
		sliderCPU.setMajorTickSpacing(7);
		sliderCPU.setMinorTickSpacing(1);
		sliderCPU.setPaintTicks(true);
		sliderCPU.setPaintLabels(true);
		sliderCPU.setValue(20);
		sliderCPU.setBounds(504, 42, 44, 126);
		contentPane.add(sliderCPU);
		
		lblCPU = new JLabel("CPU");
		lblCPU.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		lblCPU.setHorizontalTextPosition(SwingConstants.CENTER);
		lblCPU.setHorizontalAlignment(SwingConstants.CENTER);
		lblCPU.setVerticalTextPosition(SwingConstants.BOTTOM);
		lblCPU.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingJava/src/TransparanJSlider/CPU.png"));
		lblCPU.setBounds(94, 6, 193, 162);
		contentPane.add(lblCPU);
		
		lblRam = new JLabel("RAM");
		lblRam.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		lblRam.setHorizontalTextPosition(SwingConstants.CENTER);
		lblRam.setHorizontalAlignment(SwingConstants.CENTER);
		lblRam.setVerticalTextPosition(SwingConstants.BOTTOM);
		lblRam.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingJava/src/TransparanJSlider/RAM.png"));
		lblRam.setBounds(94, 218, 205, 142);
		contentPane.add(lblRam);
		
		sliderRAM = new ClSliderTransparan();
		sliderRAM.setValue(20);
		sliderRAM.setPaintTicks(true);
		sliderRAM.setSnapToTicks(true);
		sliderRAM.setFont(new Font("Comic Sans MS", Font.BOLD, 14));
		sliderRAM.setForeground(new Color(0, 0, 0));
		sliderRAM.setMaximum(800);
		sliderRAM.setMajorTickSpacing(800);
		sliderRAM.setMinorTickSpacing(100);
		sliderRAM.setPaintLabels(true);
		sliderRAM.setOrientation(SwingConstants.VERTICAL);
		sliderRAM.setBounds(504, 203, 58, 142);
		contentPane.add(sliderRAM);
		
		lblOverclock = new JLabel("Overclock");
		lblOverclock.setForeground(new Color(0, 153, 204));
		lblOverclock.setFont(new Font("Comic Sans MS", Font.BOLD, 20));
		lblOverclock.setBounds(480, 13, 146, 21);
		contentPane.add(lblOverclock);
		
		lblWall = new JLabel("");
		lblWall.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingJava/src/TransparanJSlider/wall.jpg"));
		lblWall.setBounds(0, -12, 643, 396);
		contentPane.add(lblWall);
		setLocationRelativeTo(null);
	}

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
					frameJSliderTransparan frame = new frameJSliderTransparan();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
}