我正在开发一个简单的GUI，其中包含添加，删除，写入磁盘等选项。当我编写程序时，我遇到了GUI开始消失并在设计选项卡中仅打开空白帧的问题/编辑器（也在运行时），我试图撤消多次，它回来了，但这次我到了一个我不能再撤消的点。我发布了我的所有代码。什么可以解决这个问题？
package nikola.lozanovski.bitola;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Hashtable;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
public class VozenRed extends JFrame {
public VozenRed() {
}
/**
*
*/
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private JButton Delete;
private JButton Transporter;
private JTextField IdBox;
private JTextField InitialBox;
private JTextField FinalBox;
private JTextField Hbox;
private JTextField PriceBox;
private JTextField AgencyBox;
private JTextField SaveBox;
private JTextField Mbox;
private JTextField DeleteBox;
private JTextField DestinationsBox;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
VozenRed frame = new VozenRed();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
* @return
*/
public void pishi(){ //tried deleting from here
Hashtable<Broj, Elementi> h1=new Hashtable<Broj, Elementi>();
try
{
Broj B=new Broj(IdBox.getText());
Elementi elem=new Elementi(InitialBox.getText(), FinalBox.getText(), Hbox.getText(), Mbox.getText(), PriceBox.getText(), AgencyBox.getText());
h1.put(B , elem);
}
catch(Exception e)//i tried NullPointerException still the same
{
System.out.println("asd");//not realy what i meant
}
} //deleting to here, still no frame
public void VozenRed1() {
setTitle("Transport me");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 502, 396);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JButton InitialDestination = new JButton("Initial Destination");
InitialDestination.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Input the initial destination, I.E. My Home", "Initial Destination", 2);
}
});
InitialDestination.setBounds(255, 63, 194, 23);
contentPane.add(InitialDestination);
JButton FinalDestination = new JButton("Final Destination");
FinalDestination.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Input final destination, I.E. Your Home", "Final Destination", 2);
}
});
FinalDestination.setBounds(255, 97, 194, 23);
contentPane.add(FinalDestination);
JButton TimeDeparture = new JButton("Departure Time");
TimeDeparture.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Input time, Hours in first box, Minutes in second box, I.E. 00:00", "Departure Time", 2);
}
});
TimeDeparture.setBounds(255, 128, 194, 23);
contentPane.add(TimeDeparture);
JButton TicketPrice = new JButton("Ticket Price");
TicketPrice.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,"Input price, digits only, I.E. 100","TicketPrice",2);
}
});
TicketPrice.setBounds(255, 159, 194, 23);
contentPane.add(TicketPrice);
Transporter = new JButton("Transport Agency");
Transporter.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,"Input transporter name, I.E. MyTrans","Transporter",2);
}
});
Transporter.setBounds(255, 190, 194, 23);
contentPane.add(Transporter);
JButton SaveRoute = new JButton("Save Route");
SaveRoute.setBounds(255, 320, 194, 23);
contentPane.add(SaveRoute);
Delete = new JButton("Delete");
Delete.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
Delete.setBounds(255, 286, 194, 23);
contentPane.add(Delete);
JButton Destinations = new JButton("Destinations");
Destinations.setBounds(255, 252, 194, 23);
contentPane.add(Destinations);
JLabel InputLabel = new JLabel("Input Elements");
InputLabel.setBounds(44, 11, 211, 14);
contentPane.add(InputLabel);
JLabel CommandsLabel = new JLabel("Additional Commands");
CommandsLabel.setBounds(44, 222, 201, 14);
contentPane.add(CommandsLabel);
JButton IdentificationNumber = new JButton("Identification Number");
IdentificationNumber.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JOptionPane.showMessageDialog(null, "Enter Identification number , only numbers, I.E. 0123","IdentificationNumber", 2);
}
});
IdentificationNumber.setBounds(255, 29, 194, 23);
contentPane.add(IdentificationNumber);
JButton ClearAll = new JButton("Clear All");
ClearAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
IdBox.setText(null);
InitialBox.setText(null);
FinalBox.setText(null);
Hbox.setText(null);
Mbox.setText(null);
PriceBox.setText(null);
AgencyBox.setText(null);
}
});
ClearAll.setFont(new Font("Tahoma", Font.BOLD, 11));
ClearAll.setBounds(255, 218, 194, 23);
contentPane.add(ClearAll);
JLabel lblHelpButtons = new JLabel("Help Buttons");
lblHelpButtons.setBounds(314, 11, 76, 14);
contentPane.add(lblHelpButtons);
JButton HelpDestinations = new JButton("");
HelpDestinations.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Outputs Destinations in a new box","Destinations", 2);
}
});
HelpDestinations.setBounds(459, 252, 17, 23);
contentPane.add(HelpDestinations);
JButton HelpDelete = new JButton("");
HelpDelete.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Deletes selected Identification","Delete", 2);
}
});
HelpDelete.setBounds(459, 286, 17, 23);
contentPane.add(HelpDelete);
JButton HelpSave = new JButton("");
HelpSave.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Choose Directory to save","Save Document", 2);
}
});
HelpSave.setBounds(459, 320, 17, 23);
contentPane.add(HelpSave);
JButton HelpClearAll = new JButton("");
HelpClearAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Clears all the boxes above","Clear All", 2);
}
});
HelpClearAll.setBounds(459, 218, 17, 23);
contentPane.add(HelpClearAll);
JButton IdentificationHelpButton = new JButton("");
IdentificationHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
IdBox.setText(null);
}
});
IdentificationHelpButton.setBounds(10, 29, 17, 23);
contentPane.add(IdentificationHelpButton);
JButton InitialDestinationHelpButton = new JButton("");
InitialDestinationHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
InitialBox.setText(null);
}
});
InitialDestinationHelpButton.setBounds(10, 60, 17, 23);
contentPane.add(InitialDestinationHelpButton);
JButton FinalDestinationHelpButton = new JButton("");
FinalDestinationHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
FinalBox.setText(null);
}
});
FinalDestinationHelpButton.setBounds(10, 97, 17, 23);
contentPane.add(FinalDestinationHelpButton);
JButton DeparturetimeHelpButton = new JButton("");
DeparturetimeHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Hbox.setText(null);
Mbox.setText(null);
}
});
DeparturetimeHelpButton.setBounds(10, 129, 17, 23);
contentPane.add(DeparturetimeHelpButton);
JButton TicketPriceHelpButton = new JButton("");
TicketPriceHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
PriceBox.setText(null);
}
});
TicketPriceHelpButton.setBounds(10, 159, 17, 23);
contentPane.add(TicketPriceHelpButton);
JButton TransporterHelpButton = new JButton("");
TransporterHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
AgencyBox.setText(null);
}
});
TransporterHelpButton.setBounds(10, 190, 17, 23);
contentPane.add(TransporterHelpButton);
JLabel label = new JLabel(" :");
label.setBounds(113, 132, 39, 14);
contentPane.add(label);
JButton SaveDocumentButton = new JButton("");
SaveDocumentButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
SaveBox.setText(null);
}
});
SaveDocumentButton.setBounds(10, 320, 17, 23);
contentPane.add(SaveDocumentButton);
IdBox = new JTextField();
IdBox.setBounds(44, 30, 201, 20);
contentPane.add(IdBox);
IdBox.setColumns(10);
InitialBox = new JTextField();
InitialBox.setColumns(10);
InitialBox.setBounds(44, 64, 201, 20);
contentPane.add(InitialBox);
FinalBox = new JTextField();
FinalBox.setColumns(10);
FinalBox.setBounds(44, 98, 201, 20);
contentPane.add(FinalBox);
Hbox = new JTextField();
Hbox.setColumns(10);
Hbox.setBounds(44, 129, 86, 20);
contentPane.add(Hbox);
PriceBox = new JTextField();
PriceBox.setColumns(10);
PriceBox.setBounds(44, 160, 201, 20);
contentPane.add(PriceBox);
AgencyBox = new JTextField();
AgencyBox.setColumns(10);
AgencyBox.setBounds(44, 191, 201, 20);
contentPane.add(AgencyBox);
SaveBox = new JTextField();
SaveBox.setColumns(10);
SaveBox.setBounds(44, 321, 201, 20);
contentPane.add(SaveBox);
Mbox = new JTextField();
Mbox.setColumns(10);
Mbox.setBounds(145, 129, 100, 20);
contentPane.add(Mbox);
DeleteBox = new JTextField();
DeleteBox.setColumns(10);
DeleteBox.setBounds(44, 287, 201, 20);
contentPane.add(DeleteBox);
DestinationsBox = new JTextField();
DestinationsBox.setColumns(10);
DestinationsBox.setBounds(44, 253, 201, 20);
contentPane.add(DestinationsBox);
JButton DeleteHelpButton = new JButton("");
DeleteHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
DeleteBox.setText(null);
}
});
DeleteHelpButton.setBounds(10, 286, 17, 23);
contentPane.add(DeleteHelpButton);
JButton DestinationHelpButton = new JButton("");
DestinationHelpButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
DestinationsBox.setText(null);
}
});
DestinationHelpButton.setBounds(10, 252, 17, 23);
contentPane.add(DestinationHelpButton);
}
}
答案 0 :(得分：1)
我认为您在jframe的构造函数中错过了initComponents()。
答案 1 :(得分：1)
您的代码似乎永远不会调用VozenRed1()中的所有UI内容。
您创建了VozenRed对象，该对象调用空构造函数，然后将其设置为可见。从不致电VozenRed1()。