2
我在Java程序中有兩個選項卡。一個添加一個股票,另一個列出我創建的股票。當我在第二個選項卡中添加一個新項目時,我試圖找到更新第一個選項卡中的項目列表。有任何想法嗎?將項目添加到JList時更新JTabbedPane
我想第一個選項卡顯示的項目,我創造的第二個選項卡的列表...
public class StocksGUI extends javax.swing.JFrame {
private JTextField stock, qty, purchasePrice, currentPrice;
private JButton addStockButton;
private JList<StockClass> stockList;
private DefaultListModel<StockClass> stockModel;
public StocksGUI()
{
super("Portfolio Management");
stock = new JTextField();
qty = new JTextField();
purchasePrice = new JTextField();
currentPrice = new JTextField();
addStockButton = new JButton("Add Stock");
stockList = new JList<>();
stockModel = new DefaultListModel<StockClass>();
JTabbedPane tab =new JTabbedPane();
JPanel p2 = new JPanel();
if(stockModel.size() > 1)
{
stockList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
p2.add(new JScrollPane(stockList));
}
else
{
p2.add(new JLabel("Currently No Stocks"));
tab.addTab("List",null, p2, " Panel #2");
}
JPanel p1 = new JPanel(new GridLayout(5,2));
p1.add(new JLabel("Stock"));
p1.add(stock);
p1.add(new JLabel("Quantity"));
p1.add(qty);
p1.add(new JLabel("Purchase Price"));
p1.add(purchasePrice);
p1.add(new JLabel("Current price"));
p1.add(currentPrice);
p1.add(addStockButton);
tab.addTab("Add Stock",null, p1," Panel #1");
add(tab);
TickerAdd ta = new TickerAdd();
TickerAdd.StockADD stad = ta.new StockADD();
addStockButton.addActionListener(stad);
}
public class TickerAdd
{
public class StockADD implements ActionListener
{
@Override
public void actionPerformed(ActionEvent e)
{
StockClass passing = new StockClass();
passing.stock = stock.getText();
passing.qty = Integer.parseInt(qty.getText());
passing.pp = Double.parseDouble(purchasePrice.getText());
passing.cp = Double.parseDouble(currentPrice.getText());
stockModel.addElement(passing);
stockList.setModel(stockModel);
StockBackEnd sh = new StockBackEnd();
sh.ClearInput();
stock.setText(sh.GetStockName());
qty.setText(String.valueOf(sh.GetQTY()));
purchasePrice.setText(String.valueOf(sh.GetPP()));
currentPrice.setText(String.valueOf(sh.GetCP()));
}
}
}
在此處輸入數據:
和數據應顯示這裏:
你是對的!謝謝!懂得工作 – DevDavid
@DevDavid:不客氣。我認爲你的錯誤在於,一旦模型的大小大於0,if塊會被神奇地調用,但正如你發現的那樣,Java中沒有魔法 - 代碼只運行你所說的運行,如果你想讓if塊第二次運行,你需要把它放到一個監聽器中。 –