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我正在創建一個地址簿，並具有很多功能。但是實際的表格不能被看到。數據在那裏。我可以保存並加載它，但我實際上看不到任何數據。我已經嘗試了很多東西，setContentPane()是一個。我也花時間在Oracle網站上，但無濟於事。我有示例表，顯示錶，並試圖複製一些代碼，但再次無濟於事。Java JTable不可見
public AddressBookGUI()
{
/*
* Initialise
*/
addresses = new ArrayList<Person>();
Person a = new Person("Kathy", "Smith", "1 mith Sqaoiudh", "Lonodn", "London", "BN76 8QQ", "01980472", "[email protected]");
addresses.add(a);
addressBook = new AddressBook(addresses, columnNames);
// JTable addressTable = new JTable(new TableModel());
//addressTable.setModel(new addressTable.TableModel());
createAddAddressFrame();
createEditAddressFrame();
createDeleteAddressFrame();
createAddressBookFrame();
}
//Create the address book frame
private void createAddressBookFrame() {
//Create frame
addressBookFrame = new JFrame("My Address Book");
//Create menu bar
mb = new JMenuBar();
//Create file menu
fileMenu = new JMenu("File");
anew = new JMenuItem("New");
open = new JMenuItem("Open");
save = new JMenuItem("Save");
saveAs = new JMenuItem("Save As");
print = new JMenuItem("Print");
quit = new JMenuItem("Quit");
//Create edit menu
editMenu = new JMenu("Edit");
sort = new JMenu("Sort");
byName = new JMenuItem("By Name");
byPC = new JMenuItem("By Post Code");
editSelectedPerson = new JMenuItem("Edit Selected Person");
find = new JMenuItem("Find");
findAgain = new JMenuItem("Find Again");
//Add menu items to menu bar and menu
mb.add(fileMenu);
fileMenu.add(anew);
fileMenu.add(open);
fileMenu.add(save);
fileMenu.add(saveAs);
fileMenu.addSeparator();
fileMenu.add(print);
fileMenu.add(quit);
mb.add(editMenu);
editMenu.add(editSelectedPerson);
editMenu.add(sort);
sort.add(byName);
sort.add(byPC);
editMenu.addSeparator();
editMenu.add(find);
editMenu.add(findAgain);
//Set menu bar
addressBookFrame.setJMenuBar(mb);
//Add buttons to bottom of frame
buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
//Add buttons
addButton = new JButton("Add");
editButton = new JButton("Edit...");
deleteButton = new JButton("Delete");
buttonPanel.add(addButton);
buttonPanel.add(editButton);
buttonPanel.add(deleteButton);
//Add button panel
addressBookFrame.add(buttonPanel, BorderLayout.SOUTH);
//Add action Listeners
//BUTTONS
//Add
class addListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
//Set text of JTextFields
addAddressFrame.setVisible(true);
}
}
ActionListener addList = new addListener();
addButton.addActionListener(addList);
//Edit
class editListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
row = myTable.getSelectedRow();
if (row != -1) {
//jtf1.setText((String)addressBook.getValueAt(row, 0));
//repeat
}
}
}
ActionListener editList = new editListener();
editButton.addActionListener(editList);
//Delete
class delListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
row = myTable.getSelectedRow();
if (row != -1) {
deleteAddressFrame.setVisible(true);
}
}
}
ActionListener delList = new delListener();
deleteButton.addActionListener(delList);
//MENU ITEMS
//New
class newListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
addresses.clear();
refreshAddressBook();
}
}
ActionListener newList = new newListener();
anew.addActionListener(newList);
//open
class openListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
addresses.clear();
loadFile();
}
}
ActionListener openList = new openListener();
open.addActionListener(openList);
//save
class saveListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
}
}
ActionListener saveList = new saveListener();
save.addActionListener(saveList);
//save as
class saveAsListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
saveToFile();
}
}
ActionListener saveAsList = new saveAsListener();
saveAs.addActionListener(saveAsList);
//print
class printListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
printAddresses();
}
}
ActionListener printList = new printListener();
print.addActionListener(printList);
//quit
class quitListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
System.exit(0);
}
}
ActionListener quitList = new quitListener();
quit.addActionListener(quitList);
//edit selected person
class espListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
}
}
ActionListener espList = new espListener();
editSelectedPerson.addActionListener(espList);
//sort by name
class sbnListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
sortByName();
}
}
ActionListener sbnList = new sbnListener();
byName.addActionListener(sbnList);
//sort by post code
class sbpcListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
}
}
ActionListener sbpcList = new sbpcListener();
byPC.addActionListener(sbpcList);
//find
class findListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
}
}
ActionListener findList = new findListener();
find.addActionListener(findList);
//find again
class findAgainListener implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
}
}
ActionListener findAgainList = new findAgainListener();
findAgain.addActionListener(findAgainList);
myTable = new JTable();
myTable.setPreferredScrollableViewportSize(new Dimension(500,800));
myTable.setFillsViewportHeight(true);
//myTable.setModel(addressBook);
JScrollPane scrollPane = new JScrollPane(myTable);
scrollPane.setOpaque(true);
addressBookFrame.add(scrollPane, BorderLayout.CENTER);
//addressBookFrame.add(myTable, BorderLayout.CENTER);
//FInally show the address book
addressBookFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
addressBookFrame.setTitle("My Address Book");
addressBookFrame.setSize(800, 400);
addressBookFrame.setVisible(true);
}
可能與您的表模型有關。只是猜測，因爲代碼不起作用。 –
爲了儘快提供更好的幫助，請發佈[SSCCE]（http://sscce.org/）。 –
您在代碼中註釋了兩行代碼：//myTable.setModel（addressBook）;和//addressBookFrame.add（myTable，BorderLayout.CENTER）;'爲什麼？ –