如何使Windows的JButton具有背景色和单击输入？

Question

我刚刚在Java应用程序中实现了Windows外观，但是所有按钮都失去了背景色。经过一番研究，我发现我不得不调用方法“ buttonName.setContentAreaFilled（false）;”。随后是“ buttonName.setBackground（Color.blue）;”。一切按预期进行，直到我意识到按钮失去了输入点击。

package f.h.projects;

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.JOptionPane;
//import control.Control;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
//import negocios.Usuario;

public class FHProjects extends javax.swing.JFrame implements ActionListener {

    private JLabel lCanvas, lLogo, lUsername, lPassword;
    private JTextField jUsername, jPassword;
    private JButton btnLogin;
    private BufferedImage img = null;
    //private ProjectsMenu proye;
    //private Control ctrl;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    new FHProjects().setVisible(true);
                } catch (Exception e) {
                    System.out.println(e.getMessage());
                    System.exit(0);
                }
            }
        });
    }

    public FHProjects() throws ClassNotFoundException {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (InstantiationException ex) {
            Logger.getLogger(FHProjects.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            Logger.getLogger(FHProjects.class.getName()).log(Level.SEVERE, null, ex);
        } catch (UnsupportedLookAndFeelException ex) {
            Logger.getLogger(FHProjects.class.getName()).log(Level.SEVERE, null, ex);
        }

        //ctrl = new Control();
/**
//        try {
/**
            setContentPane(lCanvas = new JLabel());
            add(lLogo = new JLabel());
            lLogo.setBounds(250, 50, 200, 200);
            img = ImageIO.read(new File("src/src/mainLogo.png"));
            Image dimg1 = img.getScaledInstance(lLogo.getWidth(), lLogo.getHeight(), Image.SCALE_SMOOTH);
            ImageIcon imageIcon1 = new ImageIcon(dimg1);
            lLogo.setIcon(imageIcon1);
        } catch (IOException e) {
            System.out.println(e.getMessage());
        }
*/
        lCanvas.setOpaque(true);
        lCanvas.setBackground(java.awt.Color.WHITE);
        lCanvas.add(lUsername = new JLabel());
        lCanvas.add(lPassword = new JLabel());
        lCanvas.add(jUsername = new JTextField());
        lCanvas.add(jPassword = new JPasswordField());
        lCanvas.add(btnLogin = new JButton());

        lUsername.setText("User: ");
        lPassword.setText("Password: ");
        btnLogin.setText("Login");
        btnLogin.setFocusPainted(false);
        btnLogin.setBorderPainted(false);
        btnLogin.setContentAreaFilled(false);
        btnLogin.setOpaque(true);

        lUsername.setFont(new java.awt.Font("Tahoma", 1, 20));
        lPassword.setFont(new java.awt.Font("Tahoma", 1, 20));
        btnLogin.setFont(new java.awt.Font("Tahoma", 1, 15));
        btnLogin.setBackground(java.awt.Color.red);
        btnLogin.setForeground(java.awt.Color.black);
        btnLogin.setBorderPainted(false);

        lUsername.setBounds(200, 280, 100, 30);
        lUsername.setHorizontalAlignment(SwingConstants.RIGHT);
        lPassword.setBounds(153, 330, 147, 30);
        lPassword.setHorizontalAlignment(SwingConstants.RIGHT);
        jUsername.setBounds(350, 280, 200, 30);
        jPassword.setBounds(350, 330, 200, 30);
        btnLogin.setBounds(300, 400, 100, 30);
        btnLogin.addActionListener(this);

        jUsername.setText("developer");
        jUsername.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    login();
                }
            }
        });
        jPassword.setText("123");
        jPassword.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    login();
                }
            }
        });

        setTitle("F&H Projects");

        setSize(700, 500);
        setResizable(false);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        //setIconImage(Toolkit.getDefaultToolkit().getImage("src/src/mainLogo.png"));
    }

    public void login() {
        boolean accedio = false;
        /**if (ctrl.login(jUsername.getText(), jPassword.getText()) != null) {
            Usuario user = ctrl.login(jUsername.getText(), jPassword.getText());
            setVisible(false);
            proye = new ProjectsMenu(this, true, user, ctrl);
            accedio = true;

        } else if (accedio == false) {
            JOptionPane.showMessageDialog(this, "Username or password is incorrect!", "Error!", JOptionPane.ERROR_MESSAGE);
        }
*/
        System.out.println("Success!");
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        JButton obj = (JButton) e.getSource();
        if (obj == btnLogin) {
            login();
        }
    }
}

按钮可以按预期工作，但令我感到困扰的是没有单击该输入。如果我记录方法“ buttonName.setContentAreaFilled（false）;”或将参数设置为true，则输入的点击会再次出现，但我会松开背景色。

是否可以在JButton中同时具有背景色和输入单击？