所以我制作了一个GUI，在这种情况下如果要将Car添加到数据库中，则单击“添加” 然后使用以下代码弹出JFrame：
public void newCar()
{
JFrame window = new JFrame("New Car");
JPanel newCarButtons = new JPanel();
newCarButtons.setLayout(new FlowLayout());
saveCar=new JButton("Save");
saveCar.addActionListener(buttonListener);
newCarButtons.add(saveCar);
cancelCar=new JButton("Cancel");
cancelCar.addActionListener(buttonListener);
newCarButtons.add(cancelCar);
JPanel newCarText = new JPanel();
GroupLayout group = new GroupLayout(newCarText);
newCarText.setLayout(group);
group.setAutoCreateGaps(true);
group.setAutoCreateContainerGaps(true);
JLabel make = new JLabel("Brand:");
JTextField maket = new JTextField(10);
newCarText.add(make);
newCarText.add(maket);
JLabel model = new JLabel("Model:");
JTextField modelt = new JTextField(10);
newCarText.add(model);
newCarText.add(modelt);
JLabel license = new JLabel("License Plate Numbers:");
JTextField licenset = new JTextField(10);
newCarText.add(license);
newCarText.add(licenset);
JLabel color = new JLabel("Color:");
JTextField colort = new JTextField(10);
newCarText.add(color);
newCarText.add(colort);
JLabel year = new JLabel("Year:");
final JTextField yeart = new JTextField(10);
yeart.addKeyListener(new KeyAdapter()
{
@Override
public void keyTyped(KeyEvent e)
{
super.keyTyped(e);
e.getKeyCode();
if (!((int) e.getKeyChar() >= 48 && (int) e.getKeyChar() <= 57))
{
e.consume();
}
}
});
newCarText.add(year);
newCarText.add(yeart);
JLabel horse = new JLabel("Horse Power: ");
JTextField horset = new JTextField(10);
newCarText.add(horse);
newCarText.add(horset);
JLabel isAvailable = new JLabel("Car Status:");
JLabel isAvailablet = new JLabel("Available");
newCarText.add(isAvailable);
newCarText.add(isAvailablet);
JLabel time = new JLabel("Time Until Service: ");
JTextField timet = new JTextField(10);
newCarText.add(time);
newCarText.add(timet);
JLabel consumption = new JLabel("Consumption per 100km: ");
JTextField consumptiont = new JTextField(10);
newCarText.add(consumption);
newCarText.add(consumptiont);
JLabel seats = new JLabel("Number of Seats: ");
JTextField seatst = new JTextField(10);
seatst.addKeyListener(new KeyAdapter()
{
@Override
public void keyTyped(KeyEvent e)
{
super.keyTyped(e);
e.getKeyCode();
if (!((int) e.getKeyChar() >= 48 && (int) e.getKeyChar() <= 57))
{
e.consume();
}
}
});
newCarText.add(seats);
newCarText.add(seatst);
JLabel doors = new JLabel("Number of Doors: ");
JTextField doorst = new JTextField(10);
doorst.addKeyListener(new KeyAdapter()
{
@Override
public void keyTyped(KeyEvent e)
{
super.keyTyped(e);
e.getKeyCode();
if (!((int) e.getKeyChar() >= 48 && (int) e.getKeyChar() <= 57))
{
e.consume();
}
}
});
newCarText.add(doors);
newCarText.add(doorst);
JLabel transmission = new JLabel("Transmission ");
JComboBox transmissiont = new JComboBox<String>();
transmissiont.addItem("Auto");
transmissiont.addItem("Manual");
transmissiont.addActionListener(buttonListener);
newCarText.add(transmission);
newCarText.add(transmissiont);
JLabel climate = new JLabel("Climate Control: ");
JComboBox climatet = new JComboBox<String>();
climatet.addItem("Yes");
climatet.addItem("No");
newCarText.add(climate);
newCarText.add(climatet);
GroupLayout.SequentialGroup hGroup = group.createSequentialGroup();
hGroup.addGroup(group.createParallelGroup().addComponent(make)
.addComponent(model).addComponent(license).addComponent(color)
.addComponent(time).addComponent(consumption)
.addComponent(year).addComponent(horse).addComponent(isAvailable)
.addComponent(seats).addComponent(doors).addComponent(transmission)
.addComponent(climate));
hGroup.addGroup(group.createParallelGroup().addComponent(maket)
.addComponent(modelt).addComponent(licenset).addComponent(colort)
.addComponent(timet).addComponent(consumptiont)
.addComponent(yeart).addComponent(isAvailablet)
.addComponent(horset).addComponent(seatst).addComponent(doorst)
.addComponent(transmissiont).addComponent(climatet));
group.setHorizontalGroup(hGroup);
GroupLayout.SequentialGroup vGroup = group.createSequentialGroup();
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(make).addComponent(maket));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(model).addComponent(modelt));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(license).addComponent(licenset));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(color).addComponent(colort));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(year).addComponent(yeart));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(horse).addComponent(horset));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(time).addComponent(timet));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(consumption).addComponent(consumptiont));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(isAvailable).addComponent(isAvailablet));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(seats).addComponent(seatst));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(doors).addComponent(doorst));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(transmission).addComponent(transmissiont));
vGroup.addGroup(group.createParallelGroup(Alignment.BASELINE)
.addComponent(climate).addComponent(climatet));
group.setVerticalGroup(vGroup);
JPanel newCar = new JPanel();
newCar.setLayout(new BorderLayout());
newCar.add(newCarText, BorderLayout.NORTH);
newCar.add(newCarButtons, BorderLayout.SOUTH);
newCar.setBorder(new TitledBorder(BorderFactory
.createLineBorder(Color.black), "[New Car]", 2, 0));
Car car1= new Car(maket.getText(), modelt.getText(), licenset.getText(), colort.getText(), Integer.parseInt("yeart.getText()"), null, horset.getText(), timet.getText(), consumptiont.getText(), Integer.parseInt("seatst.getText()"), Integer.parseInt("doorst.getText()"), null, null, 0);
window.add(newCar);
window.setLocationRelativeTo(null);
window.setSize(400, 450);
window.setVisible(true);
}
请注意，底部有一个Car对象。这是我需要你帮助的地方。添加汽车时，适配器将Car对象作为参数，因此我们的想法是填写所有文本字段，并根据您输入的文本创建一个新的Car对象。但是如果我这样做，这样它就会创建一个空的Car对象，因为当你打开窗口时，你在文本域中没有任何东西。那么当你点击“添加”时我如何制作它会根据文本字段中的内容发送一个填充的Car对象？
按钮监听器：
private class MyButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == addCars)
{
newCar();
}
if (e.getSource() == saveCar)
{
adapter.addCar(car);
}
}
}
答案 0 :(得分：0)
为什么不简单地将car对象作为参数传递给newCar方法并在那里初始化正确的字段，就像在持久化汽车实例时一样？
if (e.getSource() == addCars)
{
newCar(car);
}
请记住更改newCar方法签名。
public void newCar(Car newCar)
{
//DO WHATEVER YOU WANT WITH THAT DATA AND INITIALIZE PROPER FIELDS
JFrame window = new JFrame("New Car");
(.....)
答案 1 :(得分：0)
这应该进入听众
Car car1= new Car(maket.getText(), modelt.getText(), licenset.getText(),
colort.getText(), Integer.parseInt("yeart.getText()"), null,
horset.getText(), timet.getText(), consumptiont.getText(),
Integer.parseInt("seatst.getText()"),
Integer.parseInt("doorst.getText()"),
null, null, 0);
您想要在按下按钮时获取文本。不在您的构造函数
中 private class MyButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == addCars)
{
newCar(); // I don't know what you're trying to do here
}
if (e.getSource() == saveCar)
{
Car car1= new Car(maket.getText(), modelt.getText(), licenset.getText(),
colort.getText(), Integer.parseInt("yeart.getText()"), null,
horset.getText(), timet.getText(), consumptiont.getText(),
Integer.parseInt("seatst.getText()"),
Integer.parseInt("doorst.getText()"),
null, null, 0);
// add car1 to database
}
}
}
编辑：将所有文本字段声明为类成员，然后您可以在yout listener类中使用它们
public class GUI{
JTextFeild maket = new JTextField();
JTextFeild licenset = new JTextField();
JTextFeild colort = new JTextField();
JTextFeild yeart = new JTextField();
JTextFeild horset = new JTextField();
JTextFeild timet = new JTextField();
JTextFeild consumptiont = new JTextField();
JTextFeild maket = new JTextField();
public void newCar(){
... // remove your textfields from here.
}
public static void main(String[] args){
...
}
private class MyButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == addCars)
{
newCar(); // I don't know what you're trying to do here
}
if (e.getSource() == saveCar)
{
Car car1= new Car(maket.getText(), modelt.getText(), licenset.getText(),
colort.getText(), Integer.parseInt("yeart.getText()"), null,
horset.getText(), timet.getText(), consumptiont.getText(),
Integer.parseInt("seatst.getText()"),
Integer.parseInt("doorst.getText()"),
null, null, 0);
// add car1 to database
}
}
}
}