我有一个在netbeans中创建的项目，当我编译它创建的类文件很好。但是如果我在编译后有一个名为operator.java的文件，我得到了operator.class，运算符$ 1.class，运算符$ 2.class等等。有什么特别的理由吗？你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, 30, 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, 60, 80, 20);
jLayeredPane1.add(jLabel4, javax.swing.JLayeredPane.DEFAULT_LAYER);
cancel.setText("Cancel");
cancel.setBounds(220, 110, -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, 110, 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, javax.swing.GroupLayout.PREFERRED_SIZE, 212, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 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, javax.swing.GroupLayout.DEFAULT_SIZE, 356, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 356, 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, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 23, Short.MAX_VALUE)
.addComponent(jButton3))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 210, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jLayeredPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 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个类。所以你选择负责制作plz的线路.. oz我在这段代码中没有使用任何内部类。我不确定Enum概念，所以如果你能帮助我，我可以从那里开始学习..
答案 0 :(得分：3)
如果您的运算符类中包含内部类或枚举，那么在编译之后您将看到类似的额外类文件。
的更新 的
您已经为侦听器使用了匿名类，并且它们都是作为名称运算符$ 1.calss创建的。所以您看到这么多类文件，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);
}
});
.......
答案 1 :(得分：3)
这不是特定于netbeans。
其他类文件是在operator.java内声明的匿名类的字节码，或者如果operator是一个声明每个实例方法定义的枚举，那么这些是由编译器通过这样的附加实现的gnerated课程。
修改
这是一个匿名类定义：
new javax.swing.event.CaretListener() {
public void caretUpdate(javax.swing.event.CaretEvent evt) {
jTextField1CaretUpdate(evt);
}
}
你的代码中有几个（MoustListener，ActionListener等） - 这是一种常见的习惯用法，就像那样内联地声明侦听器实现。
答案 2 :(得分：1)
operator.java必须包含内部类。