Java 如何编辑'；布局设置代码'；在netbeans中的代码自定义程序中

我正在使用NetBeans开发一个javaswing桌面应用程序，我试图通过添加一些自定义组件来定制面板的布局，这些组件在NetBeans设计视图中不能通过拖放来完成。在设计视图中添加并调整面板大小后，NetBeans生成以下代码：

salesInfoPanel = new javax.swing.JPanel();

。。。 此处生成了一些其他内容，但它们太多，无法粘贴

现在，这是我想亲自编写的部分

        javax.swing.GroupLayout salesInfoPanelLayout = new javax.swing.GroupLayout(salesInfoPanel);
        salesInfoPanel.setLayout(salesInfoPanelLayout);
        salesInfoPanelLayout.setHorizontalGroup(
            salesInfoPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 0, Short.MAX_VALUE)
        );
        salesInfoPanelLayout.setVerticalGroup(
            salesInfoPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 132, Short.MAX_VALUE)
        );

布局代码结束

现在我的问题是我有一个方法来做自定义布局，它将自定义组件添加到面板中的布局中。但这段代码无法集成，因为NetBeans已经完成了上面的布局。我只想在将面板添加到另一个面板和布局之前调用该方法，如下所示，由NetBeans完成：

javax.swing.GroupLayout invoicePanelLayout = new javax.swing.GroupLayout(invoicePanel);
        invoicePanel.setLayout(invoicePanelLayout);
        invoicePanelLayout.setHorizontalGroup(
            invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(invoicePanelLayout.createSequentialGroup()
                .addContainerGap()
                .addGroup(invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(invoicePanelLayout.createSequentialGroup()
                        .addGap(0, 0, Short.MAX_VALUE)
                        .addComponent(advertLabel, javax.swing.GroupLayout.PREFERRED_SIZE, 209, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(32, 32, 32))
                    .addGroup(invoicePanelLayout.createSequentialGroup()
                        .addComponent(invoiceNoLabel)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(invoiceNoValue, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addContainerGap())))
            .addGroup(invoicePanelLayout.createSequentialGroup()
                .addGroup(invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(salesInfoPanel,<-------//Here is the panel
javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(customerInfoPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(cashInfoPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGroup(invoicePanelLayout.createSequentialGroup()
                            .addContainerGap()
                            .addComponent(logoLabel)))
                    .addGap(0, 0, Short.MAX_VALUE))
            );

javax.swing.GroupLayout invoicePanelLayout=newjavax.swing.GroupLayout（invoicePanel）；
invoicePanel.setLayout（invoicePanelLayout）；
invoicePanelLayout.setHorizontalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（invoicePanelLayout.createSequentialGroup（）
.addContainerGap（）
.addGroup（invoicePanelLayout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（invoicePanelLayout.createSequentialGroup（）
.addGap（0，0，短.MAX_值）
.addComponent（广告标签，javax.swing.GroupLayout.PREFERRED\u大小，209，javax.swing.GroupLayout.PREFERRED\u大小）
.addGap（32,32,32））
.addGroup（invoicePanelLayout.createSequentialGroup（）
.addComponent（发票标签）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addComponent（invoiceNoValue，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u VALUE）
.addContainerGap（）））
.addGroup（invoicePanelLayout.createSequentialGroup（）
.addGroup（invoicePanelLayout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（invoicePanelLayout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING，false）
.addComponent（salesInfoPanel，
javax.swing.GroupLayout invoicePanelLayout = new javax.swing.GroupLayout(invoicePanel);
        invoicePanel.setLayout(invoicePanelLayout);
        invoicePanelLayout.setHorizontalGroup(
            invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(invoicePanelLayout.createSequentialGroup()
                .addContainerGap()
                .addGroup(invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(invoicePanelLayout.createSequentialGroup()
                        .addGap(0, 0, Short.MAX_VALUE)
                        .addComponent(advertLabel, javax.swing.GroupLayout.PREFERRED_SIZE, 209, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(32, 32, 32))
                    .addGroup(invoicePanelLayout.createSequentialGroup()
                        .addComponent(invoiceNoLabel)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(invoiceNoValue, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addContainerGap())))
            .addGroup(invoicePanelLayout.createSequentialGroup()
                .addGroup(invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(invoicePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(salesInfoPanel,<-------//Here is the panel
javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(customerInfoPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(cashInfoPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGroup(invoicePanelLayout.createSequentialGroup()
                            .addContainerGap()
                            .addComponent(logoLabel)))
                    .addGap(0, 0, Short.MAX_VALUE))
            );