Membuat Transparan JTextField

ClButtonTransparant.java

import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import javax.swing.*;

@SuppressWarnings("serial")
public class ClButtonTransparant extends JButton{
	  private static final Color TL = new Color(1f,1f,1f,.2f);
	  private static final Color BR = new Color(0f,0f,0f,.4f);
	  private static final Color ST = new Color(1f,1f,1f,.2f);
	  private static final Color SB = new Color(1f,1f,1f,.1f);
	  private Color ssc;
	  private Color bgc;
	  private int r = 8;
	  public ClButtonTransparant(String text) {
	    super(text);
	  }
	  public ClButtonTransparant(String text, Icon icon) {
	    super(text, icon);
	  }
	  @Override public void updateUI() {
	    super.updateUI();
	    setContentAreaFilled(false);
	    setFocusPainted(false);
	    setOpaque(false);
	    setForeground(Color.WHITE);
	  }
	  @Override protected void paintComponent(Graphics g) {
	    int x = 0;
	    int y = 0;
	    int w = getWidth();
	    int h = getHeight();
	    Graphics2D g2 = (Graphics2D)g.create();
	    g2.setRenderingHint(
	      RenderingHints.KEY_ANTIALIASING,
	      RenderingHints.VALUE_ANTIALIAS_ON);
	    Shape area = new RoundRectangle2D.Float(x, y, w-1, h-1, r, r);
	    ssc = TL;
	    bgc = BR;
	    ButtonModel m = getModel();
	    if(m.isPressed()) {
	      ssc = SB;
	      bgc = ST;
	    }else if(m.isRollover()) {
	      ssc = ST;
	      bgc = SB;
	    }
	    g2.setPaint(new GradientPaint(x, y, ssc, x, y+h, bgc, true));
	    g2.fill(area);
	    g2.setPaint(BR);
	    g2.draw(area);
	    g2.dispose();
	    super.paintComponent(g);
	  }
	}

ClPanelTransparant.java

import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D; 

@SuppressWarnings("serial")
public class ClPanelTransparant extends JPanel
{
	private Color clr;
	
	public ClPanelTransparant()
	{
		setOpaque(false);
		clr = new Color(getBackground().getRed(), getBackground().getRed(), getBackground().getGreen(),50);
	}	
	
	public void setBackground(Color bg)
	{
		super.setBackground(bg);
		clr = new Color(getBackground().getRed(), getBackground().getRed(), getBackground().getGreen(),50);
		repaint();
	}
	
	protected void paintComponent(Graphics graph)
	{
		super.paintComponent(graph);
		Graphics2D g2d = (Graphics2D) graph.create();
		g2d.setColor(clr);
		g2d.fillRect(0, 0, getWidth(), getHeight());
		g2d.dispose();
	}
	
}

ClTransparanTextField.java

import java.awt.AlphaComposite;
import java.awt.Graphics;
import java.awt.Graphics2D;

import javax.swing.JTextField;

@SuppressWarnings("serial")
public class ClTransparanTextField extends JTextField {

    public ClTransparanTextField(String text) {
        super(text);
        init();
    }

    public ClTransparanTextField(int columns) {
        super(columns);
        init();
    }

    public ClTransparanTextField(String text, int columns) {
        super(text, columns);
        init();
    }

    protected void init() {
        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());
        super.paintComponent(g2d);
        g2d.dispose();
    }

}

frameTextTransparan.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.border.TitledBorder;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.ImageIcon;
import javax.swing.SwingConstants;
import java.awt.Font;
import java.awt.Color;

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

	private JPanel contentPane;
	private JPanel panel;
	private JLabel lblIdBuku;
	private JTextField txtId;
	private JTextField txtJudul;
	@SuppressWarnings("rawtypes")
	private JComboBox cbKategori;
	private JLabel lblJudul;
	private JLabel lblKategori;
	private JLabel lblStock;
	private JTextField txtStock;
	private JButton btnSimpan;
	private JButton btnUbah;
	private JButton btnHapus;
	private JLabel lblWall;

	/**
	 * Create the frame.
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public frameTextTransparan()
	{
		setTitle("TextField Transparan");
		setResizable(false);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 654, 412);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		
		panel = new ClPanelTransparant();
		panel.setBorder(new TitledBorder(null, "Data Buku", TitledBorder.RIGHT, TitledBorder.TOP, null, new Color(255, 255, 255)));
		panel.setBounds(12, 88, 453, 237);
		contentPane.add(panel);
		panel.setLayout(null);
		
		lblIdBuku = new JLabel("Id Buku : ");
		lblIdBuku.setForeground(new Color(255, 255, 255));
		lblIdBuku.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		lblIdBuku.setBounds(16, 24, 60, 15);
		panel.add(lblIdBuku);
		
		txtId = new ClTransparanTextField("");
		txtId.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		txtId.setBounds(112, 18, 155, 27);
		panel.add(txtId);
		txtId.setColumns(10);
		
		lblJudul = new JLabel("Judul : ");
		lblJudul.setForeground(new Color(255, 255, 255));
		lblJudul.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		lblJudul.setBounds(16, 62, 60, 15);
		panel.add(lblJudul);
		
		txtJudul = new ClTransparanTextField("");
		txtJudul.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		txtJudul.setBounds(112, 56, 324, 27);
		panel.add(txtJudul);
		txtJudul.setColumns(10);
		
		lblKategori = new JLabel("Kategori : ");
		lblKategori.setForeground(new Color(255, 255, 255));
		lblKategori.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		lblKategori.setBounds(16, 105, 72, 15);
		panel.add(lblKategori);
		
		cbKategori = new JComboBox();
		cbKategori.setModel(new DefaultComboBoxModel(new String[] {"== Pilih ==", "Novel", "Cerpen"}));
		cbKategori.setBounds(112, 94, 187, 36);
		panel.add(cbKategori);
		
		lblStock = new JLabel("Stock : ");
		lblStock.setForeground(new Color(255, 255, 255));
		lblStock.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		lblStock.setBounds(16, 155, 60, 15);
		panel.add(lblStock);
		
		txtStock = new ClTransparanTextField("");
		txtStock.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		txtStock.setBounds(112, 149, 122, 27);
		panel.add(txtStock);
		txtStock.setColumns(10);
		
		btnSimpan = new ClButtonTransparant("Simpan");
		btnSimpan.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		btnSimpan.setHorizontalTextPosition(SwingConstants.CENTER);
		btnSimpan.setVerticalTextPosition(SwingConstants.BOTTOM);
		btnSimpan.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingJava/src/transparanTextField/simpan.png"));
		btnSimpan.setBounds(12, 6, 117, 56);
		contentPane.add(btnSimpan);
		
		btnUbah = new ClButtonTransparant("Ubah");
		btnUbah.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		btnUbah.setHorizontalTextPosition(SwingConstants.CENTER);
		btnUbah.setVerticalTextPosition(SwingConstants.BOTTOM);
		btnUbah.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingJava/src/transparanTextField/ubah.png"));
		btnUbah.setBounds(155, 6, 125, 56);
		contentPane.add(btnUbah);
		
		btnHapus = new ClButtonTransparant("Hapus");
		btnHapus.setFont(new Font("Comic Sans MS", Font.BOLD, 12));
		btnHapus.setHorizontalTextPosition(SwingConstants.CENTER);
		btnHapus.setVerticalTextPosition(SwingConstants.BOTTOM);
		btnHapus.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingJava/src/transparanTextField/hapus.png"));
		btnHapus.setBounds(308, 6, 125, 56);
		contentPane.add(btnHapus);
		
		lblWall = new JLabel("");
		lblWall.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingJava/src/transparanTextField/wall.jpg"));
		lblWall.setBounds(0, -11, 652, 397);
		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");
					frameTextTransparan frame = new frameTextTransparan();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
}