Question

您好我正在创建内部框架，我希望通过菜单项关闭jinternalframe，但它关闭了整个框架。请帮帮我。

这是我的代码，

public class CloseWindow extends javax.swing.JFrame {

    JTextArea tx;
    int i=0;
    public CloseWindow() {
        initComponents();
    }
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        tPane = new javax.swing.JTabbedPane();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        Crete = new javax.swing.JMenuItem();
        close = new javax.swing.JMenuItem();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jMenu1.setText("File");

        Crete.setText("Create");
        Crete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                CreteActionPerformed(evt);
            }
        });
        jMenu1.add(Crete);

        close.setText("Close");
        close.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                closeActionPerformed(evt);
            }
        });
        jMenu1.add(close);

        jMenuBar1.add(jMenu1);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(tPane, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 427, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(tPane, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 279, Short.MAX_VALUE)
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents
   private void CreteActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_CreteActionPerformed
        ActionEvent ae=evt;
        final JInternalFrame internalFrame = new JInternalFrame("");
        i++;
        internalFrame.setName("Document"+i);
        internalFrame.setClosable(true);
        internalFrame.setSize(700, 700);
        tx = new JTextArea();
        internalFrame.add(tx);
        tPane.add(internalFrame);
        internalFrame.setSize(internalFrame.getMaximumSize());
        internalFrame.pack();
        internalFrame.setVisible(true);
        internalFrame.addInternalFrameListener(new InternalFrameAdapter() {
        @Override
        public void internalFrameClosing(InternalFrameEvent e) {

            tPane.remove(internalFrame);
        } 
    });


    }    



    private void closeActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_closeActionPerformed
      WindowEvent tabClosingEvent = new WindowEvent(this,WindowEvent.WINDOW_CLOSING);
            Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(tabClosingEvent);  
    }

    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 ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(CloseWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(CloseWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(CloseWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(CloseWindow.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 CloseWindow().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JMenuItem Crete;
    private javax.swing.JMenuItem close;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JTabbedPane tPane;
    // End of variables declaration//GEN-END:variables
}

Answer 1

您正在使用

创建新的WindowEvent

WindowEvent tabClosingEvent = new WindowEvent(this,....

并将其发布到事件队列中。这里的this指的是主框架。这就是它被关闭的原因。

但是，您通常应该不手动处理事件队列。相反，您应该使用执行所需操作的方法以编程方式执行相应的操作。

在第一个{和最后一个}之间的代码的某些部分可能会受益于轻微的清理，但为了解决实际问题，您可以更改{{1这样的方法：

closeActionPerformed

（顺便说一下：那你也不再需要private void closeActionPerformed(java.awt.event.ActionEvent evt) { Component c = tPane.getSelectedComponent(); if (c instanceof JInternalFrame) { JInternalFrame f = (JInternalFrame)c; f.dispose(); tPane.remove(f); } }）

通过JMenuItem关闭JInternalFrame

1 个答案: