在该书的文件批量处理模块中，很多的java文件中有如下的代码：
该书没有对这种代码的讲解，这是什么啊？好像不是人写的呀？
/** 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.
     */
jPanelLayout.setHorizontalGroup(
            jPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment
.LEADING)
            .addGroup(jPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanelLayout.createParallelGroup(javax.swing.GroupLa
yout.Alignment.TRAILING)
                    .addComponent(close)
                    .addGroup(jPanelLayout.createSequentialGroup()
                        .addComponent(messagejLabel, javax.swing.GroupLayout.P
REFERRED_SIZE, 73, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(42, 42, 42)
                        .addComponent(jLabel1, javax.swing.GroupLayout.PREFERR
ED_SIZE, 145, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(29, Short.MAX_VALUE))
        );
        jPanelLayout.setVerticalGroup(
            jPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment
.LEADING)
            .addGroup(jPanelLayout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addGroup(jPanelLayout.createParallelGroup(javax.swing.GroupLa
yout.Alignment.BASELINE)
                    .addComponent(messagejLabel, javax.swing.GroupLayout.PREFE
RRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_S
IZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(close)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.M
AX_VALUE))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getConten
tPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADI
NG)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jPanel, javax.swing.GroupLayout.PREFERRED_SIZE, 
javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.M
AX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADI
NG)
            .addComponent(jPanel, javax.swing.GroupLayout.PREFERRED_SIZE, java
x.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
        );

        pack();
    }