java - 组件状态改变时的 Action

Question

我生成了一系列单选按钮作为数组并显示在 jPanel 中。

我希望当单选按钮处于输出状态但不在输入状态时启用第二个面板中的一系列复选框(输入或输出是单选选项)。

每当单选按钮状态发生变化时，我想调用检查状态方法，但不知道如何执行此操作，因为它们是在数组中创建的。

目前，仅当实际单击单选按钮面板时才会调用该方法。

package my.ArduinoGUI;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;

public class ArduinoGUI extends javax.swing.JFrame {

public ArduinoGUI() {
    initCustomComponents();
    initComponents();
}

/**
 * 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() {

    buttonGroup1 = new javax.swing.ButtonGroup();
    jPanel1 = new javax.swing.JPanel();
    digitalPinPanel = new javax.swing.JPanel(new GridLayout(0, 3));
    jPanel3 = new javax.swing.JPanel(new GridLayout(0, 1));
    jPanel2 = new javax.swing.JPanel();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Outputs"));
    jPanel1.setName("Outputs"); // NOI18N

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 209, Short.MAX_VALUE)
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 106, Short.MAX_VALUE)
    );

    digitalPinPanel.setBorder(javax.swing.BorderFactory.createTitledBorder("Digital Pin State"));
    digitalPinPanel.addMouseListener(new java.awt.event.MouseAdapter() {
        public void mouseReleased(java.awt.event.MouseEvent evt) {
            digitalPinPanelMouseReleased(evt);
        }
    });
    digitalPinLabelArray = new javax.swing.JLabel[digitalPinTotal];
    digitalPinRadioButtonArray = new javax.swing.JRadioButton[digitalPinTotal][2];
    digitalPinGroupArray = new javax.swing.ButtonGroup[digitalPinTotal];
    for(int x = 0; x < digitalPinTotal ; x++) {
        digitalPinGroupArray[x] = new javax.swing.ButtonGroup(); // populate button group
        digitalPinLabelArray[x] = new javax.swing.JLabel(); // populate label array
        digitalPinLabelArray[x].setText("Pin " + (x +2));
        digitalPinPanel.add(digitalPinLabelArray[x]); // add label to panel
        for(int y = 0; y < 2; y++){
            digitalPinRadioButtonArray[x][y] = new javax.swing.JRadioButton(); // populate radio button array
            if (y == 0) {digitalPinRadioButtonArray[x][y].setText("Input");}
            if (y == 1) {digitalPinRadioButtonArray[x][y].setText("Output"); digitalPinRadioButtonArray[x][y].setSelected(true);
            }

            digitalPinGroupArray[x].add(digitalPinRadioButtonArray[x][y]); // assign radio buttons to group
            digitalPinPanel.add(digitalPinRadioButtonArray[x][y]); // add buttons to panel
        }

    }

    jPanel3.setBorder(javax.swing.BorderFactory.createTitledBorder("Generated Boxes"));
    digitalPinOutputArray = new javax.swing.JCheckBox[digitalPinTotal];

    for(int x = 0; x < digitalPinTotal ; x++) {
        digitalPinOutputArray[x] = new javax.swing.JCheckBox();
        digitalPinOutputArray[x].setText("Output Pin " + (x+2));

        jPanel3.add(digitalPinOutputArray[x]);

    }

    jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder("Analog Pin State"));

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 126, Short.MAX_VALUE)
    );
    jPanel2Layout.setVerticalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 0, Short.MAX_VALUE)
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            .addGap(18, 18, 18)
            .addComponent(digitalPinPanel, javax.swing.GroupLayout.PREFERRED_SIZE, 159, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addContainerGap())
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                .addGroup(layout.createSequentialGroup()
                    .addGap(23, 23, 23)
                    .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, 199, Short.MAX_VALUE)
                    .addGap(18, 18, 18)
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                    .addContainerGap()
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(digitalPinPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
            .addContainerGap())
    );

    digitalPinPanel.getAccessibleContext().setAccessibleName("DigitalPins");

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

private void digitalPinPanelMouseReleased(java.awt.event.MouseEvent evt) {

// if output selected enable checkbox otherwise disable it
    for (int x = 0; x < digitalPinTotal; x++) {

        if (digitalPinRadioButtonArray[x][0].isSelected() == true) {
            digitalPinOutputArray[x].setEnabled(false);
        }

        if (digitalPinRadioButtonArray[x][1].isSelected() == true) {
            digitalPinOutputArray[x].setEnabled(true);
        }

    }

}

/**
 * @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 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Windows".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(ArduinoGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(ArduinoGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(ArduinoGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(ArduinoGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new ArduinoGUI().setVisible(true);
        }
    });
}
// Variables declaration - do not modify
private javax.swing.ButtonGroup buttonGroup1;
private javax.swing.JPanel digitalPinPanel;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
// End of variables declaration
private int digitalPinTotal = 12;
private int analogPinTotal = 8;
private javax.swing.JCheckBox[] digitalPinOutputArray;
private javax.swing.JRadioButton[][] digitalPinRadioButtonArray;
private javax.swing.ButtonGroup[] digitalPinGroupArray;
private javax.swing.JLabel[] digitalPinLabelArray;

private void initCustomComponents() {
    //throw new UnsupportedOperationException("Not yet implemented");
    // create checkbox array
}
}

Answer 1

 digitalPinRadioButtonArray[x][y].addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent e) {
                    // TODO Auto-generated method stub
                    if(e.getActionCommand().equals("Output"))
                            {
                                    digitalPinOutputArray[2].setSelected(true);
                            }

                }
            });

试试这个