Netbeans对编译表示怀疑

问题描述

| 我有一个在netbeans中创建的项目，在编译时创建了很好的类文件。但是，如果在编译后有一个名为operator.java的文件，我得到了operator.class，operator $ 1.class，operator $ 2.class等。.这样做有什么特殊的原因吗？您能解释一下为什么会这样吗？

package admin;  
import forms_helper.global_variables;  
import java.sql.ResultSet;  
import java.sql.sqlException;  
import java.util.ArrayList;  
import java.util.List;  
import java.util.logging.Level;  
import java.util.logging.Logger;  
import utilities.MysqL_query;  
import utilities.variables;  
public class stock_adjust extends javax.swing.JFrame {`  

    List<String> list = new ArrayList<String>();
    List<String> list_id = new ArrayList<String>();
    List<String> list_quantity = new ArrayList<String>();

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

        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        products = new javax.swing.JList();
        jlayeredPane1 = new javax.swing.JlayeredPane();
        jLabel2 = new javax.swing.JLabel();
        product_name = new javax.swing.JTextField();
        qty = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        cancel = new javax.swing.JButton();
        save = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();

        setDefaultCloSEOperation(javax.swing.WindowConstants.disPOSE_ON_CLOSE);
        setTitle(\"Stock Adjust\");
        setLocationByPlatform(true);
        setResizable(false);

        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel1.setText(\"Search:\");

        jTextField1.addCaretListener(new javax.swing.event.CaretListener() {
            public void caretUpdate(javax.swing.event.CaretEvent evt) {
                jTextField1CaretUpdate(evt);
            }
        });

        products.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                productsMouseClicked(evt);
            }
        });
        products.addListSelectionListener(new javax.swing.event.ListSelectionListener() {
            public void valueChanged(javax.swing.event.ListSelectionEvent evt) {
                productsValueChanged(evt);
            }
        });
        jScrollPane1.setViewportView(products);

        jlayeredPane1.setBorder(javax.swing.BorderFactory.createTitledBorder(\"Adjust\"));

        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel2.setText(\"Product Name:\");
        jLabel2.setBounds(10,30,80,20);
        jlayeredPane1.add(jLabel2,javax.swing.JlayeredPane.DEFAULT_LAYER);
        product_name.setBounds(100,240,-1);
        jlayeredPane1.add(product_name,javax.swing.JlayeredPane.DEFAULT_LAYER);
        qty.setBounds(100,60,110,-1);
        jlayeredPane1.add(qty,javax.swing.JlayeredPane.DEFAULT_LAYER);

        jLabel4.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel4.setText(\"Quantity:\");
        jLabel4.setBounds(10,20);
        jlayeredPane1.add(jLabel4,javax.swing.JlayeredPane.DEFAULT_LAYER);

        cancel.setText(\"Cancel\");
        cancel.setBounds(220,-1,30);
        jlayeredPane1.add(cancel,javax.swing.JlayeredPane.DEFAULT_LAYER);

        save.setText(\"Save\");
        save.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                saveActionPerformed(evt);
            }
        });
        save.setBounds(50,73,30);
        jlayeredPane1.add(save,javax.swing.JlayeredPane.DEFAULT_LAYER);

        jButton3.setText(\"Keyboard\");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING,layout.createSequentialGroup()
                        .addComponent(jLabel1,javax.swing.GroupLayout.PREFERRED_SIZE,51,javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jTextField1,212,javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED,javax.swing.GroupLayout.DEFAULT_SIZE,Short.MAX_VALUE)
                        .addComponent(jButton3,99,javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING,layout.createSequentialGroup()
                        .addGap(16,16,16)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jlayeredPane1,356,Short.MAX_VALUE)
                            .addComponent(jScrollPane1,javax.swing.GroupLayout.PREFERRED_SIZE))))
                .addGap(18,18,18))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(24,24,24)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jTextField1,javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel1,23,Short.MAX_VALUE)
                    .addComponent(jButton3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jScrollPane1,210,javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18,18)
                .addComponent(jlayeredPane1,169,javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(19,19,19))
        );

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

    private void jTextField1CaretUpdate(javax.swing.event.CaretEvent evt) {                                        
        try {
            String sql = \"SELECT * FROM pos_products WHERE \"
                    + \"company_id=\'\" + global_variables.company_id + \"\' AND \"
                    + \"shop_type=\'\" + global_variables.shop_type + \"\' AND \"
                    + \"product_name LIKE \'%\" + jTextField1.getText() + \"%\' OR \"
                    + \"barcode LIKE \'%\" + jTextField1.getText() + \"%\'\";

            list.removeAll(list);
            list_id.removeAll(list_id);
            list_quantity.removeAll(list_quantity);
            ResultSet rs = MysqL_query.execute_MysqL(variables.con.conn,sql);
            products.removeAll();
            while (rs.next()) {
                list.add(rs.getString(\"product_name\"));
                list_id.add(rs.getString(\"p_id\"));
                list_quantity.add(rs.getString(\"available_stock\"));
            }
            products.setListData(list.toArray(new String[list.size()]));
        } catch (sqlException ex) {
            Logger.getLogger(stock_adjust.class.getName()).log(Level.SEVERE,null,ex);
        }
    }                                       

    private void productsValueChanged(javax.swing.event.ListSelectionEvent evt) {                                      
    }                                     

    private void productsMouseClicked(java.awt.event.MouseEvent evt) {                                      
        product_name.setText(list.get(products.getSelectedindex()));
        qty.setText(list_quantity.get(products.getSelectedindex()));
    }                                     

    private void saveActionPerformed(java.awt.event.ActionEvent evt) {                                     
        String sql = \"UPDATE pos_products SET \"
                + \"available_stock=\'\" + qty.getText() + \"\' WHERE \"
                + \"company_id=\'\" + global_variables.company_id + \"\' AND \"
                + \"p_id=\'\" + list_id.get(products.getSelectedindex()) + \"\'\";
        MysqL_query.update_MysqL(variables.con.conn,sql);
    }                                    

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokelater(new Runnable() {
            public void run() {
                new stock_adjust().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton cancel;
    private javax.swing.JButton jButton3;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JlayeredPane jlayeredPane1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField product_name;
    private javax.swing.JList products;
    private javax.swing.JTextField qty;
    private javax.swing.JButton save;  }`

在上面的代码中，我得到了6个这样的类。因此，您选择了负责制作该plz的行。oz我在此代码中未使用任何内部类。我不确定Enum概念，所以如果您能帮助我，我可以从那里开始学习。     

解决方法

这不是特定于netbeans的。 附加的类文件是在

operator.java

中声明的匿名类的字节码，或者如果

operator

是声明了按实例方法定义的枚举，则这些文件也由编译器通过这些附加的分类类来实现。 编辑： 这是一个匿名的类定义：

new javax.swing.event.CaretListener() {
        public void caretUpdate(javax.swing.event.CaretEvent evt) {
            jTextField1CaretUpdate(evt);
        }
    }

您的代码中有几个（MoustListener，ActionListener等）-像这样内联声明侦听器实现是一种常见的习惯。     ,如果您的操作员类中包含内部类或枚举，则在编译后，您将看到类似这样的额外类文件。 更新： 您已经为侦听器使用了匿名类，并且它们都被创建为名称Operator $ 1.calss，..所以您会看到这么多的类文件，因为您正在为侦听器使用匿名类。

.......
products.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                productsMouseClicked(evt);
            }
        });
products.addListSelectionListener(new javax.swing.event.ListSelectionListener() {
            public void valueChanged(javax.swing.event.ListSelectionEvent evt) {
                productsValueChanged(evt);
            }
        });
.......

    ,

operator.java

必须在内部具有内部类。