在 Netbeans 上编译：“线程“AWT-EventQueue-0”中的异常 java.lang.RuntimeException：无法编译的源代码 - 表达式的非法开始”[关闭]
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【中文标题】在 Netbeans 上编译：“线程“AWT-EventQueue-0”中的异常 java.lang.RuntimeException：无法编译的源代码 - 表达式的非法开始”[关闭]【英文标题】：Compiled on Netbeans :"Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - illegal start of expression" [closed] 【发布时间】：2021-08-02 04:20:50 【问题描述】：每当我尝试在 netbeans IDE 中编译我的 java 项目时，都会遇到这些错误。请帮助我完成它。我也提供了整个源代码。谢谢 错误如下。我正在用 java 制作一个停车场系统，我的整个源代码都是用 java 语言编写的
>Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - illegal start of expression
at NewParking.initComponents(NewParking.java:211)
at NewParking.<init>(NewParking.java:30)
at NewParking.lambda$main$0(NewParking.java:425)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
构建成功（总时间：4 秒）
代码：我的程序代码如下。
import java.awt.HeadlessException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author 7386-85615SG 2913642
*/
public class NewParking extends javax.swing.JFrame
Connection conn;
PreparedStatement pst;
ResultSet rs;
/**
* Creates new form NewParking
*/
public NewParking()
super("Parking");
initComponents();
conn=javaconnect.ConnecrDb();
getTrackNo();
String a="<html><u>NAMASTE- WELCOME TO OUR PAGE-SWAGATAM</u></html>";
jLabel10.setText(a);
/**
* 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()
buttonGroup1 = new javax.swing.ButtonGroup();
jPanel1 = new javax.swing.JPanel();
jComboBox1 = new javax.swing.JComboBox<>();
jLabel8 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
jDateChooser1 = new com.toedter.calendar.JDateChooser();
jTextField3 = new javax.swing.JTextField();
jTextField4 = new javax.swing.JTextField();
jLabel6 = new javax.swing.JLabel();
jRadioButton2 = new javax.swing.JRadioButton();
jRadioButton1 = new javax.swing.JRadioButton();
jTextField2 = new javax.swing.JTextField();
jLabel4 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jDateChooser2 = new com.toedter.calendar.JDateChooser();
jLabel5 = new javax.swing.JLabel();
jLabel7 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jLabel9 = new javax.swing.JLabel();
jTextField5 = new javax.swing.JTextField();
jPanel2 = new javax.swing.JPanel();
jButton4 = new javax.swing.JButton();
jButton5 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jLabel10 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0), 4, true));
jComboBox1.setFont(new java.awt.Font("Tahoma", 0, 36)); // NOI18N
jComboBox1.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] "Select", "Hyundai", "Honda", "Mahindra", "Maruti", "Tata", "Skoda", "BMW", "Rolls Royce", "Ferrari", "Lamborghini", "Aston Martin", "Land Rover", "Jaguar", "Nissan", "Yamaha", "Hero Honda" ));
jLabel8.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel8.setText("Full Name");
jLabel3.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel3.setText("Gender");
jLabel1.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel1.setText("RC no.");
jTextField4.setEditable(false);
jLabel6.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel6.setText("Parking Issue");
buttonGroup1.add(jRadioButton2);
jRadioButton2.setText("Male");
buttonGroup1.add(jRadioButton1);
jRadioButton1.setText("Female");
jTextField2.setEditable(false);
jLabel4.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel4.setText("Brand");
jLabel2.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel2.setText("Position");
jLabel5.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel5.setText("Parking Expiry");
jLabel7.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel7.setText("Track Number");
jLabel9.setFont(new java.awt.Font("Arial", 1, 32)); // NOI18N
jLabel9.setText("Slot No.");
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel8, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(10, 10, 10)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel9, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 289, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 23, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jRadioButton2)
.addGap(127, 127, 127)
.addComponent(jRadioButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 164, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(jTextField3, javax.swing.GroupLayout.DEFAULT_SIZE, 594, Short.MAX_VALUE)
.addComponent(jTextField1)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, 505, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jDateChooser1, javax.swing.GroupLayout.PREFERRED_SIZE, 511, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jDateChooser2, javax.swing.GroupLayout.PREFERRED_SIZE, 511, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField5, javax.swing.GroupLayout.Alignment.TRAILING))
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, 594, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(43, 43, 43))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 594, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(42, 42, 42)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(35, 35, 35)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jRadioButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 95, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jRadioButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 101, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(30, 30, 30))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel8, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(8, 8, 8)))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addComponent(jTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(11, 11, 11)))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, 58, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(50, 50, 50)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jDateChooser1, javax.swing.GroupLayout.PREFERRED_SIZE, 76, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(73, 73, 73)
.addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(90, 90, 90)
.addComponent(jDateChooser2, javax.swing.GroupLayout.PREFERRED_SIZE, 70, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(94, 94, 94)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel9, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 76, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, 73, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
jPanel2.setBorder(javax.swing.BorderFactory.createBevelBorder(???, java.awt.Color.red, java.awt.Color.black, java.awt.Color.blue, java.awt.Color.yellow));
jButton4.setFont(new java.awt.Font("Arial Black", 3, 36)); // NOI18N
jButton4.setText("BACK");
jButton4.addActionListener(new java.awt.event.ActionListener()
public void actionPerformed(java.awt.event.ActionEvent evt)
jButton4ActionPerformed(evt);
);
jButton5.setFont(new java.awt.Font("Arial Black", 3, 36)); // NOI18N
jButton5.setText("CLEAR");
jButton5.addActionListener(new java.awt.event.ActionListener()
public void actionPerformed(java.awt.event.ActionEvent evt)
jButton5ActionPerformed(evt);
);
jButton2.setFont(new java.awt.Font("Arial Black", 3, 36)); // NOI18N
jButton2.setText("PARK");
jButton2.addActionListener(new java.awt.event.ActionListener()
public void actionPerformed(java.awt.event.ActionEvent evt)
jButton2ActionPerformed(evt);
);
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton5, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 284, Short.MAX_VALUE))
.addContainerGap())
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(23, 23, 23)
.addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 159, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(43, 43, 43)
.addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 159, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(47, 47, 47)
.addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 159, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
jLabel10.setFont(new java.awt.Font("Sylfaen", 3, 62)); // NOI18N
jLabel10.setForeground(new java.awt.Color(204, 0, 204));
jLabel10.setText("NAMASTE- WELCOME TO OUR PAGE-SWAGATAM");
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.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(148, 148, 148)
.addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(218, 218, 218))
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel10, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap(143, Short.MAX_VALUE)
.addComponent(jLabel10, javax.swing.GroupLayout.PREFERRED_SIZE, 95, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(53, 53, 53)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(321, 321, 321))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 1368, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(88, 88, 88))))
);
pack();
setLocationRelativeTo(null);
// </editor-fold>
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt)
// TODO add your handling code here:
private void jTextField2MouseClicked(java.awt.event.MouseEvent evt)
// TODO add your handling code here:
private void jTextField4MouseClicked(java.awt.event.MouseEvent evt)
// TODO add your handling code here:
private void getTrackNo()
try
String sql="select * from laps where status='"+str+"'";
pst=conn.prepareStatement(sql);
rs=pst.executeQuery();
if(rs.next())
String add1=rs.getString("lapn");
jTextField2.setText(add1);
String add2=rs.getString("trackn");
jTextField4.setText(add2);
catch(Exception ex)
System.out.println("getTrackNo. Error=+ex");
finally
try
rs.close();
pst.close();
catch(Exception ex)
System.out.println("getTrackNo. Error=+ex");
public void updateData() //protocol= jdbc odbc=sub protocol//
try
String a1=jTextField2.getText();
String a2=jTextField4.getText();
pst=conn.prepareStatement("update laps set status='"+str2+"' where lapn='"+a1+"' and trackn='"+a2+"'");
pst.executeUpdate();
catch(Exception ex)
System.out.println("Error in insert"+ex);
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt)
// TODO add your handling code here:
try
String sql="insert into Registration (rc,name,gender,position,brand,issue,expiry,lapn,trackn) values (?,?,?,?,?,?,?,?,?)";
pst=conn.prepareStatement(sql);
pst.setString(1, jTextField1.getText());
pst.setString(2, jTextField3.getText());
jRadioButton2.setActionCommand("Male");
jRadioButton1.setActionCommand("Female");
pst.setString(3, buttonGroup1.getSelection().getActionCommand());
pst.setString(4, jTextField5.getText());
pst.setString(5, (String) jComboBox1.getSelectedItem());
pst.setString(6,((JTextField)jDateChooser1.getDateEditor().getUiComponent()).getText());
pst.setString(7,((JTextField)jDateChooser2.getDateEditor().getUiComponent()).getText());
pst.setString(8, jTextField2.getText());
pst.setString(9, jTextField4.getText());
pst.executeUpdate();
updateData();
JOptionPane.showMessageDialog(null, "Car Parked");
catch(HeadlessException | SQLException e)
JOptionPane.showMessageDialog(null, e);
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt)
setVisible(false);
Login ob = new Login();
ob.setVisible(true);
// TODO add your handling code here:
private void jButton5ActionPerformed(java.awt.event.ActionEvent evt)
jTextField1.setText("");
jTextField3.setText("");
jTextField5.setText("");
jTextField2.setText("");
jTextField4.setText("");
((JTextField)jDateChooser1.getDateEditor().getUiComponent()).setText("");
((JTextField)jDateChooser2.getDateEditor().getUiComponent()).setText(""); // TODO add your handling code here:
/**
* @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(NewParking.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
catch (InstantiationException ex)
java.util.logging.Logger.getLogger(NewParking.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
catch (IllegalAccessException ex)
java.util.logging.Logger.getLogger(NewParking.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
catch (javax.swing.UnsupportedLookAndFeelException ex)
java.util.logging.Logger.getLogger(NewParking.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
//</editor-fold>
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(() ->
new NewParking().setVisible(true);
);
// Variables declaration - do not modify
private javax.swing.ButtonGroup buttonGroup1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton4;
private javax.swing.JButton jButton5;
private javax.swing.JComboBox<String> jComboBox1;
private com.toedter.calendar.JDateChooser jDateChooser1;
private com.toedter.calendar.JDateChooser jDateChooser2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel10;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JLabel jLabel7;
private javax.swing.JLabel jLabel8;
private javax.swing.JLabel jLabel9;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JRadioButton jRadioButton1;
private javax.swing.JRadioButton jRadioButton2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
private javax.swing.JTextField jTextField4;
private javax.swing.JTextField jTextField5;
// End of variables declaration
String str="AVAIL";
String str2="RESERVED";
【问题讨论】：
生成的代码中似乎有一个???，无法编译。
@Kayaman 谢谢你帮助我。确实是错误。 :)
【参考方案1】：
您的错误告诉您第 211 行存在导致编译失败的问题。那行是这样的：
jPanel2.setBorder(javax.swing.BorderFactory.createBevelBorder(???, java.awt.Color.red, java.awt.Color.black, java.awt.Color.blue, java.awt.Color.yellow));
你会注意到 ???作为第一个参数，导致编译失败。
来自documentation '???'代替应为BevelBorder.LOWERED 或BevelBorder.RAISED 的type 参数。因此，如果您将上面的行更改为
jPanel2.setBorder(javax.swing.BorderFactory.createBevelBorder(BevelBorder.LOWERED, java.awt.Color.red, java.awt.Color.black, java.awt.Color.blue, java.awt.Color.yellow));
【讨论】：
嘿！非常感谢您的回答。你能告诉我如何解决这个错误吗？我非常感谢你。 @HemangJoshi 我没有使用过该功能，但从文档中看起来像您的'???'正在替换应该是type 的参数，即 BevelBorder.LOWERED 或 BevelBorder.RAISED。我将在我的答案中添加一个潜在的修复。
您好，先生。它工作正常。我将它编辑为 BevelBorder.RAISED，最终编译没有任何错误。我目前还差 6 个声望来支持答案，但我的反馈已被记录下来，并将相应更新。我只是java编程的菜鸟，但我的目标是像你一样精通。感谢您帮助我克服这个错误。先生，有一个美好的一年。以上是关于在 Netbeans 上编译：“线程“AWT-EventQueue-0”中的异常 java.lang.RuntimeException：无法编译的源代码 - 表达式的非法开始”[关闭]的主要内容，如果未能解决你的问题，请参考以下文章
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