好的，对不起即将发布的文字墙，但我有一个非常烦人的问题，我似乎无法解决。我目前正在尝试从String []填充JList，但流血的东西拒绝填充。我让我的程序愉快地写入我的源文件，并愉快地从中读取它（它向我抛出0个错误），但是当我实际尝试使用包含的数据填充我的JList时......好吧，没有任何反应，它只是拒绝做任何事。你能看看代码，并尝试为我找出问题吗？我真的不知道为什么这个非常简单的任务给了我这么多问题。
package loyaltyguis;
import javax.swing.DefaultListModel;
import loyaltyscheme.CustomerList;
import loyaltyscheme.Customer;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import javax.swing.JOptionPane;
import loyaltyguis.MainForm;
/**
*
* @author Liam
*/
public class MainForm extends javax.swing.JFrame {
public static CustomerList cust;
private DefaultListModel lModel;
private File filename;
private FileInputStream inputFile;
private ObjectInputStream objectInput;
/** Creates new form MainForm */
public MainForm() {
filename = new File("\\customer_list.dat");
readDataFromFile();
lModel = new DefaultListModel();
cust = new CustomerList();
refreshList();
initComponents();
}
private void readDataFromFile() {
try {
inputFile = new FileInputStream(filename);
objectInput = new ObjectInputStream(inputFile);
cust = (CustomerList)objectInput.readObject();
objectInput.close();
}
catch (IOException e) {
JOptionPane.showMessageDialog(this, e.getMessage(),
"I/O Error", JOptionPane.ERROR_MESSAGE);
}
catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
public void refreshList()
{
String [] customers = cust.getCustomerNames();
lModel.clear();
for(String m: customers)
{
lModel.addElement(m);
}
}
/** 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();
jLabel1 = new javax.swing.JLabel();
jPanel1 = new javax.swing.JPanel();
tbFirstName = new javax.swing.JTextField();
tbLastName = new javax.swing.JTextField();
tbEmail = new javax.swing.JTextField();
tbNumber = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
btnEdit = new javax.swing.JButton();
btnSave = new javax.swing.JButton();
btnDelete = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
lstDisplay = new javax.swing.JList();
jPanel2 = new javax.swing.JPanel();
tbCurrPoints = new javax.swing.JTextField();
jLabel6 = new javax.swing.JLabel();
jLabel7 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
btnAddPoints = new javax.swing.JButton();
btnRedeemPoints = new javax.swing.JButton();
rdSales1 = new javax.swing.JRadioButton();
rdSales2 = new javax.swing.JRadioButton();
jPanel3 = new javax.swing.JPanel();
btnAddNewCus = new javax.swing.JButton();
btnExit = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
jLabel1.setText("Customer Loyalty Points");
jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
tbFirstName.setText(" ");
tbFirstName.setEnabled(false);
tbLastName.setText(" ");
tbLastName.setEnabled(false);
tbEmail.setText(" ");
tbEmail.setEnabled(false);
tbNumber.setText(" ");
tbNumber.setEnabled(false);
jLabel2.setText("First Name(s)");
jLabel3.setText("Last Name");
jLabel4.setText("Email");
jLabel5.setText("Telephobe Number");
btnEdit.setText("Edit");
btnEdit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnEditActionPerformed(evt);
}
});
btnSave.setText("Save");
btnSave.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnSaveActionPerformed(evt);
}
});
btnDelete.setText("Delete");
lstDisplay.setModel(lModel);
jScrollPane1.setViewportView(lstDisplay);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 221, Short.MAX_VALUE)
.addComponent(btnDelete, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 221, Short.MAX_VALUE)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(btnEdit, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(tbNumber, javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(tbEmail, javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(tbLastName, javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(tbFirstName, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 105, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jLabel4)
.addComponent(jLabel3)
.addComponent(jLabel2)
.addComponent(jLabel5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btnSave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 224, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(tbFirstName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(tbLastName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel3))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(tbEmail, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel4))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(tbNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel5))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btnEdit)
.addComponent(btnSave))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btnDelete)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
jPanel2.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
tbCurrPoints.setText(" ");
jLabel6.setText("Current Points");
jLabel7.setText("Points to Add / Redeem");
jTextField1.setText(" ");
btnAddPoints.setText("Add Points");
btnRedeemPoints.setText("Redeem Points");
buttonGroup1.add(rdSales1);
rdSales1.setText("Sales Cat 1");
buttonGroup1.add(rdSales2);
rdSales2.setText("Sales Cat 2");
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(btnAddPoints, javax.swing.GroupLayout.DEFAULT_SIZE, 216, Short.MAX_VALUE)
.addComponent(jLabel6)
.addComponent(tbCurrPoints, javax.swing.GroupLayout.DEFAULT_SIZE, 216, Short.MAX_VALUE)
.addComponent(jLabel7)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 216, Short.MAX_VALUE)
.addComponent(btnRedeemPoints, javax.swing.GroupLayout.DEFAULT_SIZE, 216, Short.MAX_VALUE)
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(rdSales1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 30, Short.MAX_VALUE)
.addComponent(rdSales2)))
.addContainerGap())
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(12, 12, 12)
.addComponent(jLabel6)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(tbCurrPoints, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel7)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(3, 3, 3)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(rdSales1)
.addComponent(rdSales2))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btnAddPoints)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btnRedeemPoints)
.addContainerGap(18, Short.MAX_VALUE))
);
jPanel3.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
btnAddNewCus.setText("Add New Customer");
btnAddNewCus.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnAddNewCusActionPerformed(evt);
}
});
btnExit.setText("Exit Program");
btnExit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnExitActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(btnExit, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 216, Short.MAX_VALUE)
.addComponent(btnAddNewCus, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 216, Short.MAX_VALUE))
.addContainerGap())
);
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addComponent(btnAddNewCus, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btnExit, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
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(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(jLabel1))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(98, 98, 98))
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap())
);
pack();
}// </editor-fold>
private void btnExitActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
System.exit(0);
}
private void btnEditActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
tbFirstName.enable(true);
tbLastName.enable(true);
tbEmail.enable(true);
tbNumber.enable(true);
}
private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
tbFirstName.enable(false);
tbLastName.enable(false);
tbEmail.enable(false);
tbNumber.enable(false);
}
private void btnAddNewCusActionPerformed(java.awt.event.ActionEvent evt) {
// 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(MainForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MainForm().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton btnAddNewCus;
private javax.swing.JButton btnAddPoints;
private javax.swing.JButton btnDelete;
private javax.swing.JButton btnEdit;
private javax.swing.JButton btnExit;
private javax.swing.JButton btnRedeemPoints;
private javax.swing.JButton btnSave;
private javax.swing.ButtonGroup buttonGroup1;
private javax.swing.JLabel jLabel1;
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.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextField jTextField1;
private javax.swing.JList lstDisplay;
private javax.swing.JRadioButton rdSales1;
private javax.swing.JRadioButton rdSales2;
private javax.swing.JTextField tbCurrPoints;
private javax.swing.JTextField tbEmail;
private javax.swing.JTextField tbFirstName;
private javax.swing.JTextField tbLastName;
private javax.swing.JTextField tbNumber;
// End of variables declaration
}
这里也是我用于填充数组的类（CustomerList）：
package loyaltyscheme;
import java.util.ArrayList;
/**
* CustomerList - holds details of all the customers enrolled in the loyalty
* scheme. The current implementation is based on a simple ArrayList.
* @author Liam
*/
public class CustomerList {
private ArrayList<Customer> list;
/**
* An integer indicating that a deletion was successful.
*/
public static final int CUSTOMERDELETED = 0;
/**
* An integer indicating that an attempt to delete a customer was
* unsuccessful because the index was out of range of the collection.
*/
public static final int INVALIDINDEX = 1;
/**
* An integer indicating that a customer could not be deleted because
* the customer still has unused points.
*/
public static final int POINTSNOTZERO = 2;
/**
* Constructor - creates a new empty collection of customers,
* currently uses an ArrayList.
*/
public CustomerList() {
list = new ArrayList<Customer>();
}
/**
* Retrieves the full name of each customer.
* @return - a String array containing the full name of each customer,
* in the order in which they are stored in the collection.
*/
public String[] getCustomerNames() {
String names[] = new String[list.size()];
int pos = 0;
for (Customer customer : list) {
names[pos] = customer.getFullName();
pos ++;
}
return names;
}
/**
* Retrieves a customer from a particular location in the list. The index
* gives the location required (numbered starting from zero).
* @param index - the location of the customer required, in the range
* 0 to (list size - 1).
* @return - the Customer object at the given position in the collection.
* If the index passed in by the parameter is outside the range of the
* collection, the value 'null' will be returned.
*/
public Customer getCustomerAt(int index) {
if (index < 0 || index >= list.size())
return null;
else
return list.get(index);
}
/**
* Adds a customer to the end of the collection.
* @param customer - the new Customer object to be added.
*/
public void addCustomer(Customer customer) {
list.add(customer);
}
/**
* Removes the customer at the location indicated by the parameter.
* @param index - the location of the customer to be removed.
* @return - an integer indicating
*/
public int removeCustomerAt(int index) {
if (index < 0 || index >= list.size())
return INVALIDINDEX;
else if (list.get(index).getCurrentPoints() != 0)
return POINTSNOTZERO;
else {
list.remove(index);
return CUSTOMERDELETED;
}
}
/**
* Retrieves the grand total of unredeemed points held by all customers
* in the scheme.
* @return - the total number of points.
*/
public int getTotalPoints() {
int points = 0;
for (Customer customer : list)
points += customer.getCurrentPoints();
return points;
}
/**
* Finds out the size of the collection.
* @return - the number of customers in the list.
*/
public int size() {
return list.size();
}
/**
* Returns details of the current state of the collection.
* @return - a string containing the total size of the list and the
* total number of points held by all the customers.
*/
@Override
public String toString() {
return "CustomerList{has " + size() + " customers and "
+ getTotalPoints() + " points"
+ '}';
}
}
很抱歉，如果我错过了一些如此荒谬可笑的事情，但这让我感到疯狂，我无法发现问题，因为它根本没有引发任何错误，只是很简单就是没有这样做。 / p>
答案 0 :(得分：0)
我在代码中没有看到任何指示图形更新的地方。您只需将其添加到refreshList方法：
public void refreshList() {
...
repaint(g);
}
g是一个Graphics对象，我认为你也没有。如果不起作用，请阅读documentation。