Netbeans 中 GUI 组件的自定义 Bean 类

Question

好吧，我的教授发布了一份作业，但我们应该使用的参考代码让我感到困惑。他创建了一个 JFrame，并在该 Jframe 中放入了一个按钮，但该按钮的 bean 类是扩展 JButton 的子类 JHoverButton.Java。当我尝试在代码中执行此操作时，我无法将 Bean 类设为我自己的子类。我尝试过自定义创建代码，尝试过绑定，并且查看过堆栈溢出，但我无法真正找到答案。任何帮助将不胜感激！

这是我老师发的

这就是我被困住的地方。

任何帮助将不胜感激，谢谢！

BeanProjectTest.Java 源代码：

package beanproject;

import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.plaf.metal.*;


 public class BeanProjectTest extends javax.swing.JFrame {

/**
 * Creates new form BeanProjectTest
 */
public BeanProjectTest() {
    initComponents();
    try{
        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
        //UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
        MetalLookAndFeel.setCurrentTheme(new DefaultMetalTheme());
        SwingUtilities.updateComponentTreeUI(this);

    }catch(Exception e){
        JOptionPane.showMessageDialog(this, e.toString());
    }
}

/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    jColorChooser1 = new javax.swing.JColorChooser();
    jHoverButton1 = new beanproject.JHoverButton();
    jIntegerField1 = new beanproject.JIntegerField();
    jButton1 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    setTitle("Bean Project Test");

    jHoverButton1.setText("jHoverButton1");

    jIntegerField1.setText("jIntegerField1");

    jButton1.setText("jButton1");

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(38, 38, 38)
            .addComponent(jHoverButton1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 110, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(53, 53, 53))
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jIntegerField1, javax.swing.GroupLayout.PREFERRED_SIZE, 163, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap())
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(43, 43, 43)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jHoverButton1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton1))
            .addGap(72, 72, 72)
            .addComponent(jIntegerField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(241, Short.MAX_VALUE))
    );

    pack();
}// </editor-fold>                        

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */

    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new BeanProjectTest().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JButton jButton1;
private javax.swing.JColorChooser jColorChooser1;
private beanproject.JHoverButton jHoverButton1;
private beanproject.JIntegerField jIntegerField1;
// End of variables declaration                   

}

JHoverButton.Java 源代码：

public class JHoverButton extends JButton implements MouseListener{

public JHoverButton(){
    super();
    initialize();
}

private void initialize(){
    setBorderPainted(false);
    addMouseListener(this);
}

public JHoverButton(String text){
    super(text);
    initialize();
}

public JHoverButton(String text, Icon icon){
    super(text, icon);
    initialize();
}

public void setEnabled(boolean enabled){
    super.setEnabled(enabled);
    if(enabled){
        if(isBorderPainted()){
            setBorderPainted(false);
            repaint();
        }
    }
}

@Override
public void mouseClicked(MouseEvent me) {

}

@Override
public void mousePressed(MouseEvent me) {

}

@Override
public void mouseReleased(MouseEvent me) {

}

@Override
public void mouseEntered(MouseEvent me) {
   if(!isBorderPainted() && isEnabled()){
       setBorderPainted(true);
       repaint();
   }
}

@Override
public void mouseExited(MouseEvent me) {
    if(isBorderPainted()){
        setBorderPainted(false);
        repaint();
    }
}

}

Answer 1

作为初学者，请注意，如果您手动编写 GUI 而不是使用 GUI 构建器，那么添加第三方组件会更容易：

JPanel panel = new JPanel();
panel.add(new JHoverButton("Hello!"));
...
frame.add(panel);

话虽如此，您需要添加一个新的 Bean 并指定组件的完整路径，而不是从调色板中添加 JButton：

packagename.ComponentName

。

1.选择选择 Bean 选项

2.通过插入类的完整路径来选择适当的bean

3.放置 JHoverButton 组件

4.检查 Bean 的属性

Answer 2

1. 单击 JHoverButton.java 文件
2. CTRL+C
3. 在设计器视图中单击 JPanel
4. CTRL+V

来源：http://wiki.netbeans.org/FaqFormUsingCustomComponent

Answer 3

只需拖放： 将 JHoverButton.java 文件从 Projects 窗格拖动到 Form Designer 窗口，然后根据需要调整对象大小。它几乎就像使用Swing Control，但带有您自己定制设计的按钮。如果 JHoverButton.java 已经工作或者至少是一个工作存根，那么效果最好。