我有两个基于JFrame
的窗口:SeatLayout
和BillSummary
。我需要从seatnumber
框架中获取SeatLayout
并将其显示在BillSummary
中,但变量作用域仅限于第一帧。
我怎样才能做到这一点?
最佳答案
使用多个JFrame是一个不好的做法,应避免使用。
原因是,它将在将来增加更多问题,并且将成为维护的噩梦。
要回答您的问题,如何将变量从父代(JFrame)传递给子代(JDialog)。这可以通过使用JDialog实现。
我将通过一个例子。
可以说,您的BillSummary.java是....
//BillSummary Class
public class billSummary {
JFrame frame;
billSummary(JFrame frame) {
this.frame = frame;
}
public void launchbillSummary(int seatNumber) {
// Create a dialog that suits your ui , you can use JPanel as your layout container
JDialog dialog = new JDialog(frame, "Bill Summary", true);
dialog.setLayout(new BorderLayout());
dialog.setSize(100, 100);
dialog.add(new JLabel(Integer.toString(seatNumber)), BorderLayout.CENTER);
dialog.setVisible(true);
}
}
您的seatLayout.java
public class seatLayout {
seatLayout(){
//Lets say you have seleted seat number 10
int defaultSeatNumber = 10;
//Lets say you have a button and when it is clicked , you pass the data to billsummary page
JButton enter = new JButton("Enter");
//Your seatLayout GUI
JFrame frame = new JFrame("seat layout");
frame.setSize(300,300);
frame.add(enter);
enter.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
//Do your passing of data/ price of calculation here
//You pass the data that to your custom dialog -> Bill summary
new billSummary(frame).launchbillSummary(defaultSeatNumber);
}
});
frame.setVisible(true);
}
public static void main(String[] args){
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new seatLayout();
}
});
}
}
希望能对您有所帮助。祝好运 :)
关于java - 将可变范围从一帧扩展到另一帧,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/58364114/