1
因此，我有一個MainFrame類，其中有一個JTable，列出了存儲在數據庫中的所有產品。 JButton在偵聽器的幫助下將打開AddProduct（另一個類和另一個窗口/框架），我可以在其中添加產品。不幸的是，一旦AddProduct添加新產品和自動關閉，我不確定如何在MainFrame中更新/重新驗證JTable。 有些人可以給我一些想法，我該如何輕鬆解決這個問題？Java，如何從另一個框架刷新一個框架中的JTable
由於程序是相當大的，這裏是它的相關部分： 從MainFrame.java
public JPanel tabProducts() {
JPanel panel = new JPanel(new MigLayout("","20 [grow, fill] 10 [grow, fill] 20", "20 [] 10 [] 20"));
/** Labels **/
JLabel label = new JLabel("List of all available products");
/** Buttons **/
JButton add = new JButton("Add product");
add.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
new AddProduct();
}
});
JButton update = new JButton("Update product");
update.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
new UpdateProduct(ps.getProductByID(15));
}
});
/** TABLE: Products **/
String[] tableTitle = new String[] {"ID", "Name", "Type", "Price", "In stock"};
String[][] tableData = null;
DefaultTableModel model = new DefaultTableModel(tableData, tableTitle);
JTable table = null;
/** Disable editing of the cell **/
table = new JTable(model){
public boolean isCellEditable(int r, int c) {
return false;
}
};
/** Load the products from DB **/
List<Product> listInv = ps.getProductsByAtt(new ArrayList<String>());
for (int i = 0; i < listInv.size(); i++) {
model.insertRow(i, new Object[] {
listInv.get(i).getID(),
listInv.get(i).getName(),
listInv.get(i).getType(),
listInv.get(i).getPrice(),
listInv.get(i).getQuantity()
});
}
/** Add scroll pane **/
JScrollPane scrollpane = new JScrollPane(table);
/** Add everything to the panel **/
panel.add(label, "wrap, span");
panel.add(scrollpane, "wrap, span");
panel.add(add);
panel.add(update);
return panel;
}
而且AddProduct.java
public class AddProduct {
private JFrame frame;
private JButton add, cancel;
private JRadioButton food, beverage;
private JTextField name, price, quantity;
private IProductService ps = new ProductService();
private ButtonGroup group = new ButtonGroup();
private Product p;
private String type = "";
public AddProduct() {
/** Frame options **/
frame = new JFrame("Add new product");
frame.setSize(400, 280);
frame.setMinimumSize(new Dimension(400, 280));
frame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
/** Default panel **/
final JPanel panel = new JPanel(new MigLayout("","20 [grow, fill] 10 [grow, fill] 20", "20 [] 10 [] 20"));
/** Radio Buttons to choose between the food and the beverages **/
food = new JRadioButton("Food");
beverage = new JRadioButton("Beverage");
group.add(food);
group.add(beverage);
food.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
type = "Food";
frame.validate();
}
});
beverage.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
type = "Beverage";
frame.validate();
}
});
/** Add everything to the panel **/
panel.add(new JLabel("Product ID"));
panel.add(new JLabel(Integer.toString(ps.getProductNr()+1)), "wrap, span 2");
panel.add(new JLabel("Name"));
panel.add(name = new JTextField(""), "wrap, span 2");
panel.add(new JLabel("Type"));
panel.add(food);
panel.add(beverage, "wrap");
panel.add(new JLabel("Price"));
panel.add(price = new JTextField(""), "wrap, span 2");
panel.add(new JLabel("Quantity"));
panel.add(quantity = new JTextField(""), "wrap, span 2");
/** Button: ADD **/
add = new JButton("Add product");
add.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (!type.equals("Food") && !type.equals("Beverage")) {
JOptionPane.showMessageDialog(panel, "Please choose the type of this product.");
} else if (name.getText().equals("")) {
JOptionPane.showMessageDialog(panel, "Please type a name for this product.");
} else if (price.getText().equals("")) {
JOptionPane.showMessageDialog(panel, "Please enter the price for this product.");
} else if (quantity.getText().equals("")) {
JOptionPane.showMessageDialog(panel, "Please enter the available amount of this product in stock.");
} else {
try {
p = new Product(ps.getProductNr()+1, name.getText(), type, Double.parseDouble(price.getText()), Integer.parseInt(quantity.getText()));
if (ps.addProduct(p)) {
JOptionPane.showMessageDialog(panel, "Product successfully added!");
frame.validate();
frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
}
} catch (Exception ex) {
addFinalError();
}
}
}
});
/** Button: CANCEL **/
cancel = new JButton("Cancel");
cancel.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
}
});
/** Add buttons to the panel **/
panel.add(cancel);
panel.add(add, "span 2");
/** Add panel to frame and make it visible **/
frame.add(panel);
frame.setVisible(true);
}
/**
* In case more then one error is encountered
*/
private void addFinalError(){
JOptionPane.showMessageDialog(frame, "An error occured while adding the product. Please make sure the following is correct:\n\n" +
" Name : Can contain letters and numbers\n" +
" Price : Must be a number\n" +
" Quantity : Must be a whole number\n");
}
}
不確定要嘗試什麼。我的第二天曾經和gui一起工作過，所以我有點害怕，因爲與我還沒有做的其他程序相比，這只是一個小小的挫折。我用Google搜索了它，但大多數答案都沒有幫助，或者我不知道如何實現它們。所以，當我問我應該從哪裏開始。我不想找人爲我編程，只是爲了指點我。 – vedran 2012-03-20 11:18:52