使用多帧显示文本字段数据

Question

我是 java 的菜鸟，我在构建我的 gui 时遇到了障碍......我需要做的是运行我的 shippingApp 程序，该程序显示我的 EnterShipInfo 框架，该框架有几个文本字段用于输入数据和一个输入按钮，当clicked 将输入的数据传递给我的 ShipmentFrame。最初，当框架弹出时，应该有三个标签，其中只显示“标签”和一个显示按钮，然后当您单击显示按钮时，文本字段中的数据会在三个标签中弹出以及其他一些单词造句。

// ShipmentFrame 代码从这里开始

        private static final long serialVersionUID = 1L;
        private Label headerLbl = null;
        private Button displayButton = null;
        private Button Exit = null;
        private Label shipLbl = null;
        private Label empLbl = null;
        private Label dateTimeLbl = null;
        private Shipment s;
        private Shipment sf;



        public ShipmentFrame(Shipment ship){
            super();
            this.s = ship;
            initialize();
            s = ship;



        }


        public void actionPerformed(ActionEvent e) {


            shipLbl.setText("Shipment number " + s.getShipmentNum() + 
                    " was received from "  + s.getSupplierName());
            empLbl.setText("By employee number " + s.getEmployeeNum());
            dateTimeLbl.setText("On " + s.getRevDate() + " at " +      s.getRevTime());

        }

// 这是我来自 EnterShipInfo 的代码

        private static final long serialVersionUID = 1L;
        private Label headerLbl = null;
        private Button displayButton = null;
        private Button Exit = null;
        private Label dateLbl = null;
        private Label timeLbl = null;
        private Label suplLbl = null;
        private Shipment s;
        private Label shipNumLbl = null;
        private Label empNumLbl = null;
        private TextField empNumTF = null;
        private TextField shipNumTF = null;
        private TextField dateTF = null;
        private TextField timeTF = null;
        private TextField supplTF = null;

        Shipment ship = new Shipment (" ", " ", " ", " ", " "); 

        //  @jve:decl-index=0:
        public EnterShipInfo(){
            super();

    //      this.s = ship;
            initialize();
        }

//这是错误的部分

        public void actionPerformed(ActionEvent e) {
            String employeeNum = empNumTF.getText();
            String shipmentNum = shipNumTF.getText();
            String revDate = dateTF.getText();
            String revTime = timeTF.getText();
            String supplierName = supplTF.getText();
            ShipmentFrame sf = new ShipmentFrame(null);


        }

//下面是我一直在寻找的......也许有人知道更有效的方法来完成这个

public void actionPerformed(ActionEvent e) {
    ship.setEmployeeNum(empNumTF.getText());

    ship.setShipmentNum( shipNumTF.getText());
    ship.setRevDate( dateTF.getText());
    ship.setRevTime(timeTF.getText());
    ship.setSupplierName( supplTF.getText());
    ShipmentFrame sf = new ShipmentFrame(ship);


}

Answer 1

编辑

以下是在 JFrame 中显示组件的一般流程：

1 - 设置您的 JFrame（布局、边框等）：

JFrame frame = new JFrame("Frame Title");
JPanel contentPane = ((JPanel) frame.getContentPane());

contentPane.setLayout(new GridLayout(4,1)); //use whatever kind of layout you need
contentPane.setBorder(new EmptyBorder(10,10,10,10)); //use whatever kind of border you need

2 - 初始化您的组件（在这种情况下，两个 JTextField 和一个 JButton）：

JTextField empNumTF = new JTextField("Initial text in field");
JTextField shipNumTF = new JTextField("Initial text in field");
JButton displayButton = new JButton("Display");

3 - 将您的组件添加到 JFrame 的 contentPane：

contentPane.add(empNumTF);
contentPane.add(shipNumTF);
contentPane.add(displayButton);

4 - 打包并显示：

frame.pack();
frame.setVisible(true);

那么您的 JFrame 应该与这些组件一起显示。

---

添加

现在，如果我们想要操纵用户在这些文本字段中输入的内容，我们需要为按钮添加一个动作监听器。为此：

1 - 通过声明 implements ActionListener:

将您的一个类设为 动作侦听器（如果需要，您可以使用创建 JButton 的同一类）

public class EnterShipInfo implements ActionListener{

2 - 向按钮添加一个动作监听对象，如下所示：

displayButton.addActionListener(this);
//using "this" means that the object this JButton was created in is the action listener.

3 - 将 actionPerformed() 方法添加到您的 ActionListener（您似乎已经正确完成了）：

public void actionPerformed(ActionEvent e){
    //insert code to execute whenever your button is clicked.
}

---

所以现在，特别是对您而言，在您的 actionPerformed() 方法中，您可能希望像这样处理它：

public void actionPerformed(ActionEvent e){
    if (e.getActionCommand().equals("Display")){ //"Display" is the text on the JButton
        String employeeNum = empNumTF.getText();
        String shipmentNum = shipNumTF.getText();
        String revDate = dateTF.getText();           //These text fields
        String revTime = timeTF.getText();           //not coded in
        String supplierName = supplTF.getText();     //my example
        ShipmentFrame sf = new ShipmentFrame(new Shipment(shipmentNum, supplierName, revDate, revTime, employeeNum)); //I'm just guessing at the order these come in
        sf.setVisible(true);
    }
}

您可能想查看一些关键文档：

• javax.swing.JFrame
• javax.swing.JPanel
• javax.swing.JTextField
• javax.swing.JButton
• javax.swing.border.EmptyBorder
• java.awt.GridLayout