Question

我只需要在按钮的actionperformed事件触发时禁用大型机中的按钮，并在内部框架关闭后再次启用它，我尝试了几种方法，但所有这些方法都不起作用我在这里使用netbeans是我正在尝试做的事情

大型机类

 package tt;

public class Test extends javax.swing.JFrame {

public Test() {
    initComponents();
}

@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

    jDesktopPane1 = new javax.swing.JDesktopPane();
    jPanel1 = new javax.swing.JPanel();
    jButton1 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    javax.swing.GroupLayout jDesktopPane1Layout = new javax.swing.GroupLayout(
            jDesktopPane1);
    jDesktopPane1.setLayout(jDesktopPane1Layout);
    jDesktopPane1Layout.setHorizontalGroup(jDesktopPane1Layout
            .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 578, Short.MAX_VALUE));
    jDesktopPane1Layout.setVerticalGroup(jDesktopPane1Layout
            .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 367, Short.MAX_VALUE));

    jButton1.setText("OPEN");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton1ActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(
            jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(jPanel1Layout.createParallelGroup(
            javax.swing.GroupLayout.Alignment.LEADING).addGroup(
            jPanel1Layout
                    .createSequentialGroup()
                    .addGap(136, 136, 136)
                    .addComponent(jButton1,
                            javax.swing.GroupLayout.PREFERRED_SIZE, 74,
                            javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE,
                            Short.MAX_VALUE)));
    jPanel1Layout.setVerticalGroup(jPanel1Layout.createParallelGroup(
            javax.swing.GroupLayout.Alignment.LEADING).addComponent(
            jButton1, javax.swing.GroupLayout.Alignment.TRAILING,
            javax.swing.GroupLayout.DEFAULT_SIZE, 39, Short.MAX_VALUE));

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(
            getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(layout
            .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jDesktopPane1)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE,
                    javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));
    layout.setVerticalGroup(layout
            .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(
                    layout.createSequentialGroup()
                            .addComponent(jDesktopPane1)
                            .addPreferredGap(
                                    javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                            .addComponent(jPanel1,
                                    javax.swing.GroupLayout.PREFERRED_SIZE,
                                    javax.swing.GroupLayout.DEFAULT_SIZE,
                                    javax.swing.GroupLayout.PREFERRED_SIZE)));

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

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    jButton1.setEnabled(false);
    NewJInternalFrame nf = new NewJInternalFrame();
    jDesktopPane1.add(nf);
    nf.show();
}

public static void main(String args[]) {


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

    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Test().setVisible(true);
        }
    });
}

// Variables declaration - do not modify
public javax.swing.JButton jButton1;
private javax.swing.JDesktopPane jDesktopPane1;
private javax.swing.JPanel jPanel1;
// End of variables declaration

}

内部框架类

  package tt;

   public class NewJInternalFrame extends javax.swing.JInternalFrame {

public NewJInternalFrame() {
    initComponents();
}

@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

    setClosable(true);
    setIconifiable(true);
    setMaximizable(true);
    setResizable(true);
    addInternalFrameListener(new javax.swing.event.InternalFrameListener() {
        public void internalFrameActivated(
                javax.swing.event.InternalFrameEvent evt) {
        }

        public void internalFrameClosed(
                javax.swing.event.InternalFrameEvent evt) {
            formInternalFrameClosed(evt);
        }

        public void internalFrameClosing(
                javax.swing.event.InternalFrameEvent evt) {
        }

        public void internalFrameDeactivated(
                javax.swing.event.InternalFrameEvent evt) {
        }

        public void internalFrameDeiconified(
                javax.swing.event.InternalFrameEvent evt) {
        }

        public void internalFrameIconified(
                javax.swing.event.InternalFrameEvent evt) {
        }

        public void internalFrameOpened(
                javax.swing.event.InternalFrameEvent evt) {
        }
    });

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(
            getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(layout.createParallelGroup(
            javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 394,
            Short.MAX_VALUE));
    layout.setVerticalGroup(layout.createParallelGroup(
            javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 274,
            Short.MAX_VALUE));

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

private void formInternalFrameClosed(
        javax.swing.event.InternalFrameEvent evt) {
    Test njf = new Test();
    njf.jButton1.setEnabled(true);
}


  }

My test programme

Answer 1

将一个InternalFrameListener添加到您的JInternalFrame中，并在JInternalFrame关闭或关闭时或两者都重新启用JButton。

或者更好 - 看起来好像你正在尝试创建和显示JOptionPane的JInternalFrame等价物，如果是这样，你可以直接通过JOptionPane showInternalXxxDialog直接执行此操作，如所讨论的here。

顺便说一下，你发布的代码显示了一些神奇的想法：

private void formInternalFrameClosed(javax.swing.event.InternalFrameEvent evt) {                                         
    posframe pos = new posframe(); // **** here***
    pos.jButton1.setEnabled(true);
    JOptionPane.showMessageDialog(null,"closed");
}

你正在创建一个新的posframe（顺便说一下，它应该重命名为PosFrame以符合Java命名规则），并假设如果你在这个新的posframe对象上启用JButton，它将神奇地启用JButton显示的posframe对象，但请理解这不是Java的工作方式，两个posframe对象是完全不同的，设置未显示的posframe的状态对显示的posframe没有影响。如果您的代码有效，您首先必须将显示的posframe对象的引用传递给上面调用此代码的类。

此外，您的代码表明jButton1已被声明为public，如果是这样，这是一个潜在危险的事情，应该避免。

修改
好的，根据您发布的代码，我看到了两个可能解决您问题的方法。

将主GUI的引用传递给JInternalFrame代码

使用此引用可以使用引用设置类的字段。

然后在监听器中，在主GUI上调用 public 方法（如果可能的话，不要公开字段）。

或者更好的解决方案是不要让JInternalFrame担心不应该关注它。而是将监听器放在调用类中，这样它就可以自行更改，而不需要其他类来操作它真正不应该负责的事情。

示例一的代码如下所示。 // !!注意变化评价。

public class Test extends javax.swing.JFrame { public Test() { initComponents(); } @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { jDesktopPane1 = new javax.swing.JDesktopPane(); jPanel1 = new javax.swing.JPanel(); jButton1 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); javax.swing.GroupLayout jDesktopPane1Layout = new javax.swing.GroupLayout( jDesktopPane1); jDesktopPane1.setLayout(jDesktopPane1Layout); jDesktopPane1Layout.setHorizontalGroup(jDesktopPane1Layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 578, Short.MAX_VALUE)); jDesktopPane1Layout.setVerticalGroup(jDesktopPane1Layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 367, Short.MAX_VALUE)); jButton1.setText("OPEN"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout( jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup(jPanel1Layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING).addGroup( jPanel1Layout .createSequentialGroup() .addGap(136, 136, 136) .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 74, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))); jPanel1Layout.setVerticalGroup(jPanel1Layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING).addComponent(jButton1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 39, Short.MAX_VALUE)); javax.swing.GroupLayout layout = new javax.swing.GroupLayout( getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jDesktopPane1) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)); layout.setVerticalGroup(layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING).addGroup( layout.createSequentialGroup() .addComponent(jDesktopPane1) .addPreferredGap( javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))); pack(); }// </editor-fold> private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { jButton1.setEnabled(false); NewJInternalFrame nf = new NewJInternalFrame(this); //!! jDesktopPane1.add(nf); nf.show(); } public static void main(String args[]) { try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager .getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(Test.class.getName()).log( java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(Test.class.getName()).log( java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(Test.class.getName()).log( java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(Test.class.getName()).log( java.util.logging.Level.SEVERE, null, ex); } // </editor-fold> java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new Test().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton jButton1; //!! make this private private javax.swing.JDesktopPane jDesktopPane1; private javax.swing.JPanel jPanel1; // End of variables declaration //!! added public void setButton1Enabled(boolean enabled) { jButton1.setEnabled(enabled); } } class NewJInternalFrame extends javax.swing.JInternalFrame { private Test test; //!! public NewJInternalFrame(Test test) { //!! this.test = test; //!! initComponents(); } @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { setClosable(true); setIconifiable(true); setMaximizable(true); setResizable(true); addInternalFrameListener(new javax.swing.event.InternalFrameListener() { public void internalFrameActivated( javax.swing.event.InternalFrameEvent evt) { } public void internalFrameClosed( javax.swing.event.InternalFrameEvent evt) { formInternalFrameClosed(evt); } public void internalFrameClosing( javax.swing.event.InternalFrameEvent evt) { } public void internalFrameDeactivated( javax.swing.event.InternalFrameEvent evt) { } public void internalFrameDeiconified( javax.swing.event.InternalFrameEvent evt) { } public void internalFrameIconified( javax.swing.event.InternalFrameEvent evt) { } public void internalFrameOpened( javax.swing.event.InternalFrameEvent evt) { } }); javax.swing.GroupLayout layout = new javax.swing.GroupLayout( getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup(layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 394, Short.MAX_VALUE)); layout.setVerticalGroup(layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 274, Short.MAX_VALUE)); pack(); }// </editor-fold> private void formInternalFrameClosed(javax.swing.event.InternalFrameEvent evt) { //!! Test njf = new Test(); //!! njf.jButton1.setEnabled(true); test.setButton1Enabled(true); //!! don't expose the button but a method } }

第二个解决方案的部分代码如下所示：

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { jButton1.setEnabled(false); NewJInternalFrame nf = new NewJInternalFrame(); jDesktopPane1.add(nf); nf.show(); // !! do all this in the calling code nf.addInternalFrameListener(new InternalFrameAdapter() { @Override public void internalFrameClosed(InternalFrameEvent arg0) { jButton1.setEnabled(true); } }); }

打开jinternalframe时管理大型机中的按钮状态

1 个答案: