在最小化和取消最小化之前无法调整内部框架的大小

Question

要重现问题：运行代码，看你不能 move/resize/maximize 内部框架。最小化和取消最小化框架，观察您现在可以移动、调整大小和最大化内部框架。

如何让它在创建时可以移动和调整大小？谢谢！

此外，我正在使用最新版本的 netbeans 自动生成此代码。

/**
 *
 * @author admin
 */
public class SelectorFrame2 extends javax.swing.JFrame {

    /**
     * Creates new form SelectorFrame2
     */
    public SelectorFrame2() {
        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() {

        jDesktopPane1 = new javax.swing.JDesktopPane();
        jInternalFrame4 = new javax.swing.JInternalFrame();
        jInternalFrame5 = new javax.swing.JInternalFrame();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        jMenu2 = new javax.swing.JMenu();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jInternalFrame4.setIconifiable(true);
        jInternalFrame4.setMaximizable(true);
        jInternalFrame4.setResizable(true);
        jInternalFrame4.setDoubleBuffered(true);
        jInternalFrame4.setVisible(true);

        javax.swing.GroupLayout jInternalFrame4Layout = new javax.swing.GroupLayout(jInternalFrame4.getContentPane());
        jInternalFrame4.getContentPane().setLayout(jInternalFrame4Layout);
        jInternalFrame4Layout.setHorizontalGroup(
            jInternalFrame4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 275, Short.MAX_VALUE)
        );
        jInternalFrame4Layout.setVerticalGroup(
            jInternalFrame4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 179, Short.MAX_VALUE)
        );

        jInternalFrame5.setIconifiable(true);
        jInternalFrame5.setMaximizable(true);
        jInternalFrame5.setResizable(true);
        jInternalFrame5.setDoubleBuffered(true);
        jInternalFrame5.setVisible(true);

        javax.swing.GroupLayout jInternalFrame5Layout = new javax.swing.GroupLayout(jInternalFrame5.getContentPane());
        jInternalFrame5.getContentPane().setLayout(jInternalFrame5Layout);
        jInternalFrame5Layout.setHorizontalGroup(
            jInternalFrame5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 275, Short.MAX_VALUE)
        );
        jInternalFrame5Layout.setVerticalGroup(
            jInternalFrame5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 171, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout jDesktopPane1Layout = new javax.swing.GroupLayout(jDesktopPane1);
        jDesktopPane1.setLayout(jDesktopPane1Layout);
        jDesktopPane1Layout.setHorizontalGroup(
            jDesktopPane1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jDesktopPane1Layout.createSequentialGroup()
                .addContainerGap(209, Short.MAX_VALUE)
                .addComponent(jInternalFrame5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 128, Short.MAX_VALUE)
                .addComponent(jInternalFrame4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(117, Short.MAX_VALUE))
        );
        jDesktopPane1Layout.setVerticalGroup(
            jDesktopPane1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jDesktopPane1Layout.createSequentialGroup()
                .addContainerGap(233, Short.MAX_VALUE)
                .addComponent(jInternalFrame4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(174, Short.MAX_VALUE))
            .addGroup(jDesktopPane1Layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jInternalFrame5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jDesktopPane1.setLayer(jInternalFrame4, javax.swing.JLayeredPane.DEFAULT_LAYER);
        jDesktopPane1.setLayer(jInternalFrame5, javax.swing.JLayeredPane.DEFAULT_LAYER);

        jMenu1.setText("File");
        jMenuBar1.add(jMenu1);

        jMenu2.setText("Edit");
        jMenuBar1.add(jMenu2);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jDesktopPane1)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jDesktopPane1)
        );

        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 
         */
        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(SelectorFrame2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(SelectorFrame2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(SelectorFrame2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(SelectorFrame2.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 SelectorFrame2().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JDesktopPane jDesktopPane1;
    private javax.swing.JInternalFrame jInternalFrame4;
    private javax.swing.JInternalFrame jInternalFrame5;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenuBar jMenuBar1;
    // End of variables declaration                   
}

Answer 1

通过为 JDesktopPane 使用 GroupLayout，您可以让组布局管理器定义 JInternalPane 的位置和大小。您必须通过代码定义初始大小和位置，而不是为 JDesktopPane 使用组布局。

我建议您通读 Java Swing Tutorial, the chapter "How to Use Internal Frames"

在最小化和取消最小化之前无法调整内部框架的大小

Can't resize internal frame until after its minimized and un minimized

java

swing

jframe

jinternalframe