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我在這行得到這個錯誤：錯誤：無法解析爲一個類型
private List<Contractor> contractors = new ArrayList<Contractor>();
它說，承包商不能被解析爲一個類型。現在我在這裏做的是我有一個客戶課。我也需要創建一個與客戶類完全一樣的承包商類。所以我複製了客戶類中的所有內容並創建了一個承包商類。然後我在下面的代碼中添加了所有內容，我認爲這與客戶類相同，但是有些問題是錯誤的。
public class SwimCalc extends JFrame implements ActionListener {
private JTabbedPane jtabbedPane;
private JPanel Customers;
private JPanel Contractors;
private List<Customer> customers = new ArrayList<Customer>();
// this fails
private List<Contractor> contractors = new ArrayList<Contractor>();
JTextArea NameTextCustomers, ExistTextCustomers, MessageTextCustomers,
NameTextContractors, ExistTextContractors, MessageTextContractors;
JTextField lengthTextPool, widthTextPool, depthTextPool, volumeTextPool;
public SwimCalc() {
setTitle("Volume Calculator");
setSize (300, 200);
JPanel topPanel = new JPanel();
topPanel.setLayout(new BorderLayout());
getContentPane().add(topPanel);
createCustomers();
createContractors();
jtabbedPane = new JTabbedPane();
jtabbedPane.addTab("Customer", Customers);
topPanel.add(jtabbedPane, BorderLayout.CENTER);
}
}
這裏是承包壹級
public JPanel createContractors(){
Contractors = new JPanel();
Contractors.setLayout(null);
NameTextContractors = new JTextArea("Select Add Contractor to Add Contractor." +
"\nSelect Refresh to Refresh This Pane.");
NameTextContractors.setLineWrap(true);
NameTextContractors.setBounds(10, 10, 390, 150);
Contractors.add(NameTextContractors);
JButton Exit = new JButton("Exit");
Exit.setBounds(30,170,80,20);
Exit.addActionListener(this);
Exit.setBackground(Color.white);
Contractors.add(Exit);
JButton AddContractors = new JButton("Add Contractor");
AddContractors.setBounds(130,170,120,20);
AddContractors.setBackground(Color.white);
Contractors.add(AddContractors);
JButton Refresh = new JButton("Refresh");
Refresh.setBounds(260,170,80,20);
Refresh.setBackground(Color.white);
Contractors.add(Refresh);
ExistTextContractors = new JTextArea("File Contractor.txt does not exist yet." +
"\nIt will be created when you add Contractor.");
ExistTextContractors.setBounds(10, 200, 390, 60);
ExistTextContractors.setLineWrap(true);
Contractors.add(ExistTextContractors);
final JTextArea contArea = new JTextArea(6, 30);
final JTextArea ExistTextContractors;
ExistTextContractors = new JTextArea(2, 30);
ExistTextContractors.setLineWrap(true);
ExistTextContractors.setWrapStyleWord(true);
AddContractors.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e){
new Contractor("Contractor", SwimCalc.this);
}
});
Contractors.add(contArea);
Contractors.add(AddContractors);
Contractors.add(Refresh);
Refresh.setMnemonic('R');
Refresh.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
NameTextContractors.setText ("");
try{
File contOpen = new File("Contractor.txt");
FileReader contAreaIn = new FileReader(contOpen);
contArea.read(contAreaIn, contOpen.getAbsolutePath());
ExistTextContractors.setText("File exists and can be read.");
}
catch (IOException e3){
ExistTextContractors.setText("The file could not be read." + e3.getMessage());
}
}
}
);
return Contractors;
}
class Contractor extends JFrame
{
private String[] states = {"AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE",
"FL", "GA", "HI", "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME",
"MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ",
"NM", "NY", "NC", "ND", "OH", "OK", "OR", "PA", "RI", "SC", "SD",
"TN", "TX", "UT", "VT", "VA", "WA", "WV", "WI", "WY"};
private JComboBox StateList = new JComboBox(states);
private JTextField NameText = new JTextField(25);
private JTextField AddressText = new JTextField(25);
private JTextField CityText = new JTextField(25);
private JTextField ZipText = new JTextField(9);
private JTextField PhoneText = new JTextField(10);
private JTextField MessageTextContractors = new JTextField(30);
private static final long serialVersionUID = 1L;
private AddContButtonHandler addConHandler = new AddContButtonHandler();
private SwimCalc parent;
public Contractor(String who, SwimCalc _parent) {
popUpWindow (who);
parent = _parent;
}
public void popUpWindow(final String who) {
final JFrame popWindow;
popWindow = new JFrame(who);
popWindow.setSize(425, 350);
popWindow.setLocation(100, 100);
popWindow.setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
Container c = new Container();
popWindow.add(c);
c.setLayout(new FlowLayout());
JPanel one = new JPanel();
JPanel two = new JPanel();
JPanel three = new JPanel();
JPanel four = new JPanel();
JPanel five = new JPanel();
JPanel six = new JPanel();
one.add(new JLabel(who + " Name "));
one.add(NameText);
two.add(new JLabel("Address "));
two.add(AddressText);
three.add(new JLabel("City "));
three.add(CityText);
four.add(new JLabel("State "));
StateList.setSelectedIndex(0);
four.add(StateList);
four.add(new JLabel("ZIP"));
four.add(ZipText);
four.add(new JLabel("Phone"));
four.add(PhoneText);
JButton addwho = new JButton("Add " + who);
addwho.setMnemonic('A');
JButton close = new JButton("Exit");
close.setMnemonic('C');
JButton deleteFile = new JButton("Delete File");
deleteFile.setMnemonic('D');
five.add(addwho);
five.add(close);
five.add(deleteFile);
MessageTextContractors.setEditable(false);
MessageTextContractors.setHorizontalAlignment(JTextField.CENTER);
six.add(MessageTextContractors);
c.add(one);
c.add(two);
c.add(three);
c.add(four);
c.add(five);
c.add(six);
deleteFile.setToolTipText("Delete File");
addwho.setToolTipText("Add "+ who);
close.setToolTipText("Exit");
if (who == "Contractor")
addwho.addActionListener(addConHandler);
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
NameText.setText("");
AddressText.setText("");
CityText.setText("");
ZipText.setText("");
PhoneText.setText("");
MessageTextContractors.setText("");
popWindow.dispose();
}
}
);
deleteFile.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
MessageTextContractors
.setText("");
if (who.equals("Contractor")) {
File file = new File("Contractor.txt");
boolean conFileDeleted = file.delete();
if (conFileDeleted) {
MessageTextContractors
.setText("Contractor file has been deleted");
} else {
MessageTextContractors
.setText("There was an error in deleting file");
}
}
}
}
);
}
class AddContButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent addConHandler) {
int StateIndex;
try {
File file = new File("Contractor.txt");
StringBuilder sb = new StringBuilder();
boolean success = file.createNewFile();
if (success) {
MessageTextContractors
.setText("Contractor.txt file created file added");
} else if (file.canWrite()) {
MessageTextContractors
.setText("Writing data to Contractor.txt, file added");
} else {
MessageTextContractors.setText("Cannot create file: Contractor.txt");
}
try {
FileWriter fileW = new FileWriter("Contractor.txt", true);
sb.append(NameText.getText());
sb.append("\n");
sb.append(AddressText.getText());
sb.append("\n");
sb.append(CityText.getText());
sb.append("\n");
StateIndex = StateList.getSelectedIndex();
sb.append(states[StateIndex]);
sb.append("\n");
sb.append(ZipText.getText());
sb.append("\n");
sb.append(PhoneText.getText());
sb.append("\r\n");
fileW.write(sb.toString());
parent.setField(sb.toString());
fileW.close();
MessageTextContractors.setText("A new Contractor has been added!");
ExistTextContractors.setText ("File Contractor.txt exists and can be read from!");
FileReader fileR = new FileReader("Contractor.txt");
BufferedReader buffIn = new BufferedReader(fileR);
String textData = buffIn.readLine();
buffIn.close();
}
catch (IOException e1) {
JOptionPane.showMessageDialog(null, e1.getMessage(), "ERROR", 2);
}
NameText.setText("");
AddressText.setText("");
CityText.setText("");
ZipText.setText("");
PhoneText.setText("");
}
catch (IOException e1) {
}
}
}
public void actionPerformed(ActionEvent event){
}
private void Exit_pressed(){
System.exit(0);
}
}
你可以發佈你的合同班嗎？ – RoflcoptrException 2011-03-29 11:50:36
我沒有看到你導入承包商類... – Erik 2011-03-29 11:52:13
@Erik他也沒有導入客戶。所以我認爲它是在同一個包裏？ – RoflcoptrException 2011-03-29 11:53:50