当从 Java 中的 JComboBox 中选择一个项目时，我想在 JTable 中添加数据？

Question

我制作了一个 JComboBOx，其中展示了我销售的产品。当用户单击我在数组列表中搜索的项目并返回一个对象时，我想从该对象中将信息放入二维数组中，然后我想将该二维数组添加到 JTable 的行中，但我是在 table 中没有得到任何东西。谁能帮助我如何在从 JComboBox 选择项目时在 JTable 中添加项目？

            public void actionPerformed(ActionEvent arg0) {
            String boughtThing = InventoryList.getSelectedItem().toString();
            int NumberOfItems = Integer.parseInt(JOptionPane.showInputDialog("Enter the Number Item"));

            ImplementInventoryServices service = new ImplementInventoryServices();
            Inventory thing = service.searchInventory(boughtThing);

            double price = thing.getPricePerUnit();
            String nameOfProduct = thing.getInventoryName();
            int stock = thing.getNumberOfInventory();
            int IDofProduct = thing.getInventoryID();

            subtotal = 0;
            subtotal = price * NumberOfItems;

            stock = stock - NumberOfItems;

            data[0][0] = Double.toString(price);
            data[0][1] = nameOfProduct;
            data[0][2] = Integer.toString(NumberOfItems);
            data[0][3] = Double.toString(subtotal);

            info = new Information(price, nameOfProduct, IDofProduct, subtotal);

            Inventory inventory = new Inventory(nameOfProduct, IDofProduct, price, stock);
            ImplementInventoryServices updating = new ImplementInventoryServices();
            updating.updateInventory(nameOfProduct, inventory);
            subTotalList.add(subtotal);
            DataHandlingForInventory.write();

        }
    });


    String [] columns = {"ID","Name","Price Per Unit", "Sub Total"};
    OrignalTable = new JTable(data,columns);
    OrignalTable.setBounds(10, 119, 425, 219);
    InvoiceMake.getContentPane().add(OrignalTable);

Answer 1

这样试试：

创建一个 DefaultTableModel 来保存您的数据，并 link 将其发送到 table:

Object [] columns = {"ID","Name","Price Per Unit", "Sub Total"};
tableModel = new DefaultTableModel(columns, 0);
OrignalTable = new JTable(tableModel);

现在您可以使用该模型（定义为 class 中的一个字段，因此您可以在匿名 ActionListener 中访问）处理数据：

      // before
      //  data[0][0] = Double.toString(price);
      //  data[0][1] = nameOfProduct;
      //  data[0][2] = Integer.toString(NumberOfItems);
      //  data[0][3] = Double.toString(subtotal);
      // after
      tableModel.addRow(new Object[]{Double.toString(price),
                             nameOfProduct,
                             Integer.toString(NumberOfItems),
                             Double.toString(subtotal)});

请务必阅读 How to Use Tables

上的文档

当从 Java 中的 JComboBox 中选择一个项目时，我想在 JTable 中添加数据？

I want to add Data in JTable when an item is selected from JComboBox in Java?

java

jtable

jcombobox