JFrame/JPanel's not showing with Group Layout
Question
I have a pretty big setup here and its still very much a WIP. Right now I want to get my GUI displaying properly, and switching between panels at the click of a button. In my GUI() method, I set up my various panels with group layout. At the end of the class, you will notice methods i want to use to set the various panels visible or invisible. LoginP is the panel i want to see when i run the code, so i call the corresponding method at the end of my GUI() method, but for some strange reason, when I run it is as if there are no panels at all, just a blank JFrame. I added a System.out.println(); just after I call the method to set LoginP to visible (at the end of the GUI() method), but alas, that line is not printed. I'm sure the answer is staring me right in the face, but I'm just not able to see it.
Edit: For those who feel like playing a bit, here are all the source files: http://goo.gl/KjW8cH
//Individual Imports
/*
import java.awt.GroupLayout;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JCheckBox;
import javax.swing.JOptionPane;
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
public class GUI extends JFrame
{
/*#################################################################################################################################################################
*#####################################################################################################################################################
*###############################################################################################################################################################*/
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Login Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel loginP;
private JLabel titleL;
private JLabel instructL;
private JLabel usernameL;
private JLabel passwordL;
private JLabel loginL;
private JButton studentB;
private JButton lecturerB;
private JTextField usernameTF;
private JTextField passwordTF;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Add Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ private JPanel addQP;
private JPanel addQP;
private JLabel instructionsL;
private JLabel txtL;
private JLabel infoL;
private JButton appendB;
private JButton overwriteB;
private JTextField pathTF;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel questionP;
private JLabel qNumL;
private JLabel groupL;
private JLabel questionL;
private JLabel opt1L;
private JLabel opt2L;
private JLabel opt3L;
private JLabel opt4L;
private JButton opt1B;
private JButton opt2B;
private JButton opt3B;
private JButton opt4B;
String qNumber = "3";
String group = "JDBC";
String question = "This is the question";
String opt1 = "This is option 1";
String opt2 = "This is option 2";
String opt3 = "This is option 3";
String opt4 = "This is option 4";
String a = "a.";
String b = "b.";
String c = "c.";
String d = "d.";
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Viewer Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel viewerP;
private JLabel aL;
private JLabel bL;
private JLabel cL;
private JLabel dL;
private JButton nextB;
private JButton closeB;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Select Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel selectQP;
private JLabel instruct1L;
private JLabel askL;
private JCheckBox checkBox1;
private JCheckBox checkBox2;
private JCheckBox checkBox3;
private JCheckBox checkBox4;
private JButton viewB;
private JButton startB;
private JTextField numOfQTF;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel markP;
private JLabel percentageL;
private JLabel outOfL;
private JButton backB;
private JButton logOutB;
Connection con;
Statement stmt;
ResultSet rs;
/*#################################################################################################################################################################
*#########################################################################Panels##################################################################################
*###############################################################################################################################################################*/
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Login Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public GUI()
{
super("Tester");
setLayout(new FlowLayout());
loginP = new JPanel();
add(loginP);
GroupLayout loginPLayout = new GroupLayout(loginP);
loginP.setLayout(loginPLayout);
loginPLayout.setAutoCreateGaps(true);
loginPLayout.setAutoCreateContainerGaps(true);
Font font = new Font("Freestyle Script", Font.PLAIN,80);
titleL = new JLabel("Tester");
titleL.setFont(font);
instructL = new JLabel("Please eneter your name and password and select your login type to login.");
usernameL = new JLabel("Username:");
passwordL = new JLabel("Password:");
loginL = new JLabel("Login as");
studentB = new JButton("Student");
lecturerB = new JButton("Lecturer");
usernameTF = new JTextField("", 100);
passwordTF = new JTextField("", 100);
studentB.addActionListener(new studentH());
lecturerB.addActionListener(new lecturerH());
loginPLayout.setHorizontalGroup(loginPLayout.createSequentialGroup()
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(usernameL)
.addComponent(passwordL))
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.CENTER)
.addComponent(titleL)
.addComponent(instructL)
.addComponent(usernameTF)
.addComponent(passwordTF)
.addComponent(loginL)
.addGroup(loginPLayout.createSequentialGroup()
.addComponent(studentB)
.addComponent(lecturerB)))
);
loginPLayout.setVerticalGroup(loginPLayout.createSequentialGroup()
.addComponent(titleL)
.addComponent(instructL)
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(usernameL)
.addComponent(usernameTF))
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(passwordL)
.addComponent(passwordTF))
.addComponent(loginL)
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(studentB)
.addComponent(lecturerB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Select Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
selectQP = new JPanel();
add(selectQP);
GroupLayout selectQPLayout = new GroupLayout(selectQP);
selectQP.setLayout(selectQPLayout);
selectQPLayout.setAutoCreateGaps(true);
selectQPLayout.setAutoCreateContainerGaps(true);
String cat1 = "Collections";
String cat2 = "Multithreading";
String cat3 = "Networking";
String cat4 = "JDBC";
instruct1L = new JLabel("Select the groups of questions you would like to be tested on");
askL = new JLabel("How many questions would you like?");
checkBox1 = new JCheckBox(cat1);
checkBox2 = new JCheckBox(cat2);
checkBox3 = new JCheckBox(cat3);
checkBox4 = new JCheckBox(cat4);
viewB = new JButton("View Questions");
startB = new JButton("Start Test");
numOfQTF = new JTextField("", 100);
viewB.addActionListener(new viewH());
startB.addActionListener(new startH());
selectQPLayout.setHorizontalGroup(selectQPLayout.createParallelGroup()
.addComponent(instruct1L)
.addComponent(checkBox1)
.addComponent(checkBox2)
.addComponent(checkBox3)
.addComponent(checkBox4)
.addComponent(askL)
.addComponent(numOfQTF)
.addGroup(selectQPLayout.createSequentialGroup()
.addComponent(viewB)
.addComponent(startB))
);
selectQPLayout.setVerticalGroup(selectQPLayout.createSequentialGroup()
.addComponent(instruct1L)
.addComponent(checkBox1)
.addComponent(checkBox2)
.addComponent(checkBox3)
.addComponent(checkBox4)
.addComponent(askL)
.addComponent(numOfQTF)
.addGroup(selectQPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(viewB)
.addComponent(startB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Add Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
addQP = new JPanel();
add(addQP);
GroupLayout addQPLayout = new GroupLayout(addQP);
addQP.setLayout(addQPLayout);
addQPLayout.setAutoCreateGaps(true);
addQPLayout.setAutoCreateContainerGaps(true);
instructionsL = new JLabel("Please enter the name of the file:");
txtL = new JLabel(".txt");
infoL = new JLabel("You will be logged out after the questions have been added.");
appendB = new JButton("Append Questions");
overwriteB = new JButton("Overwrite Questions");
pathTF = new JTextField("", 100);
appendB.addActionListener(new appendH());
overwriteB.addActionListener(new overwriteH());
addQPLayout.setHorizontalGroup(addQPLayout.createSequentialGroup()
.addGroup(addQPLayout.createParallelGroup(GroupLayout.Alignment.CENTER)
.addComponent(instructionsL)
.addGroup(addQPLayout.createSequentialGroup()
.addComponent(pathTF)
.addComponent(txtL))
.addComponent(infoL)
.addGroup(addQPLayout.createSequentialGroup()
.addComponent(appendB)
.addComponent(overwriteB)))
);
addQPLayout.setVerticalGroup(addQPLayout.createSequentialGroup()
.addComponent(instructionsL)
.addGroup(addQPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(pathTF)
.addComponent(txtL))
.addComponent(infoL)
.addGroup(addQPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(appendB)
.addComponent(overwriteB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
qNumL = new JLabel("Question Number: " + qNumber);
groupL = new JLabel("Group: " + group);
questionL = new JLabel(question);
opt1L = new JLabel(opt1);
opt2L = new JLabel(opt2);
opt3L = new JLabel(opt3);
opt4L = new JLabel(opt4);
opt1B = new JButton("A");
opt2B = new JButton("B");
opt3B = new JButton("C");
opt4B = new JButton("D");
questionP = new JPanel();
add(questionP);
GroupLayout questionPLayout = new GroupLayout(questionP);
questionP.setLayout(questionPLayout);
questionPLayout.setAutoCreateGaps(true);
questionPLayout.setAutoCreateContainerGaps(true);
optH handler = new optH();
opt1B.addActionListener(handler);
//opt2B.addActionListener(handler);
//opt3B.addActionListener(handler);
//opt4B.addActionListener(handler);
questionPLayout.setHorizontalGroup(questionPLayout.createSequentialGroup()
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(questionL)
.addComponent(opt1B)
.addComponent(opt2B)
.addComponent(opt3B)
.addComponent(opt4B))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(opt1L)
.addComponent(opt2L)
.addComponent(opt3L)
.addComponent(opt4L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.TRAILING)
.addComponent(groupL))
);
questionPLayout.setVerticalGroup(questionPLayout.createSequentialGroup()
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(groupL))
.addComponent(questionL)
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt1B)
.addComponent(opt1L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt2B)
.addComponent(opt2L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt3B)
.addComponent(opt3L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt4B)
.addComponent(opt4L))
);
showLoginP();
System.out.println("Im here");
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Viewer Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
qNumL = new JLabel("Question Number: " + qNumber);
groupL = new JLabel("Group: " + group);
questionL = new JLabel(question);
aL = new JLabel("A");
bL = new JLabel("B");
cL = new JLabel("C");
dL = new JLabel("D");
opt1L = new JLabel(opt1);
opt2L = new JLabel(opt2);
opt3L = new JLabel(opt3);
opt4L = new JLabel(opt4);
nextB = new JButton("Next");
closeB = new JButton("Close");
viewerP = new JPanel();
add(viewerP);
GroupLayout viewerPLayout = new GroupLayout(viewerP);
viewerP.setLayout(viewerPLayout);
viewerPLayout.setAutoCreateGaps(true);
viewerPLayout.setAutoCreateContainerGaps(true);
viewerPLayout.setHorizontalGroup(viewerPLayout.createSequentialGroup()
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(questionL)
.addComponent(aL)
.addComponent(bL)
.addComponent(cL)
.addComponent(dL))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(opt1L)
.addComponent(opt2L)
.addComponent(opt3L)
.addComponent(opt4L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.TRAILING)
.addComponent(groupL)
.addGroup(viewerPLayout.createSequentialGroup()
.addComponent(nextB)
.addComponent(closeB)))
);
viewerPLayout.setVerticalGroup(viewerPLayout.createSequentialGroup()
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(groupL))
.addComponent(questionL)
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(aL)
.addComponent(opt1L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(bL)
.addComponent(opt2L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(cL)
.addComponent(opt3L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(dL)
.addComponent(opt4L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(nextB)
.addComponent(closeB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
markP = new JPanel();
add(markP);
GroupLayout markPLayout = new GroupLayout(markP);
markP.setLayout(markPLayout);
markPLayout.setAutoCreateGaps(true);
markPLayout.setAutoCreateContainerGaps(true);
int percentage = 90;
int correct = 9;
int total = 10;
percentageL = new JLabel("You scored: " + percentage + "%");
outOfL = new JLabel("You have " + correct + " corret answers out of a possible " + total);
backB = new JButton("Back to Group Selection");
logOutB = new JButton("Log Out");
backB.addActionListener(new backH());
logOutB.addActionListener(new logOutH());
markPLayout.setHorizontalGroup(markPLayout.createParallelGroup()
.addComponent(percentageL)
.addComponent(outOfL)
.addGroup(markPLayout.createSequentialGroup()
.addComponent(backB)
.addComponent(logOutB))
);
markPLayout.setVerticalGroup(markPLayout.createSequentialGroup()
.addComponent(percentageL)
.addComponent(outOfL)
.addGroup(markPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(backB)
.addComponent(logOutB))
);
}
showLoginP();
System.out.println("Im here");
/*#################################################################################################################################################################
*#####################################################################Action Listeners############################################################################
*###############################################################################################################################################################*/
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Login Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class studentH implements ActionListener
{
@Override
public void actionPerformed(ActionEvent event)
{
Student stu = new Student();
String username = usernameTF.getText();
String password = passwordTF.getText();
boolean correct = stu.Student(username, password);
if(correct == true)
{
showSelectQP();
}
else
{
JOptionPane.showMessageDialog(null, "You have entered incorect details. Please try again", "Incorrect Details", JOptionPane.ERROR_MESSAGE);
usernameTF.setText("");
passwordTF.setText("");
}
}
}
private class lecturerH implements ActionListener
{
@Override
public void actionPerformed(ActionEvent event)
{
Lecturer lect = new Lecturer();
String username = usernameTF.getText();
String password = passwordTF.getText();
boolean correct = lect.Lecturer(username, password);
if(correct == true)
{
showAddQP();
}
else
{
JOptionPane.showMessageDialog(null, "You have entered incorect details. Please try again", "Incorrect Details", JOptionPane.ERROR_MESSAGE);
usernameTF.setText("");
passwordTF.setText("");
}
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Add Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class appendH implements ActionListener
{
@Override
public void actionPerformed(ActionEvent event)
{
//Append appen = new Append();
String path = pathTF.getText();
//appen.Append(path);
}
}
private class overwriteH implements ActionListener
{
@Override
public void actionPerformed(ActionEvent event)
{
Overwrite over = new Overwrite();
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class optH implements ActionListener
{
@Override
public void actionPerformed( ActionEvent event )
{
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Select Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class viewH implements ActionListener
{
@Override
public void actionPerformed( ActionEvent event )
{
}
}
private class startH implements ActionListener
{
@Override
public void actionPerformed( ActionEvent event )
{
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class backH implements ActionListener
{
@Override
public void actionPerformed( ActionEvent event )
{
}
}
private class logOutH implements ActionListener
{
@Override
public void actionPerformed( ActionEvent event )
{
}
}
public void showLoginP()
{
addQP.setVisible(false);
questionP.setVisible(false);
viewerP.setVisible(false);
markP.setVisible(false);
selectQP.setVisible(false);
loginP.setVisible(true);
revalidate();
repaint();
}
public void showAddQP()
{
questionP.setVisible(false);
viewerP.setVisible(false);
markP.setVisible(false);
selectQP.setVisible(false);
loginP.setVisible(false);
addQP.setVisible(true);
}
public void showQuestionP()
{
addQP.setVisible(false);
viewerP.setVisible(false);
markP.setVisible(false);
selectQP.setVisible(false);
loginP.setVisible(false);
questionP.setVisible(true);
}
public void showViewerP()
{
addQP.setVisible(false);
questionP.setVisible(false);
markP.setVisible(false);
selectQP.setVisible(false);
loginP.setVisible(false);
viewerP.setVisible(true);
}
public void showMarkP()
{
addQP.setVisible(false);
questionP.setVisible(false);
viewerP.setVisible(false);
selectQP.setVisible(false);
loginP.setVisible(false);
markP.setVisible(true);
}
public void showSelectQP()
{
addQP.setVisible(false);
//questionP.setVisible(false);
viewerP.setVisible(false);
markP.setVisible(false);
loginP.setVisible(false);
selectQP.setVisible(true);
}
}
1 answers
solution1
2 ACCPTED 2014-11-19 22:00:03
This won't answer your question, but there's so much going on here I'm going to take it one part at a time. First of all, don't put the main method in another class, there's really no reason to. Add this to your existing GUI class and delete the other class:
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
GUI gui = new GUI();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setSize(600, 400);
gui.setResizable(true);
gui.setVisible(true);
}
});
}
I suggest doing so just above your constructor so it's easy to find.
EDIT: Here's a version that uses cardlayout. You're welcome.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
public class GUI extends JFrame {
JComboBox<String> comboBox;
private JPanel cardPanel;
/*#################################################################################################################################################################
*########################################################################Constructors#############################################################################
*###############################################################################################################################################################*/
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Login Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel loginP;
private JLabel titleL;
private JLabel instructL;
private JLabel usernameL;
private JLabel passwordL;
private JLabel loginL;
private JButton studentB;
private JButton lecturerB;
private JTextField usernameTF;
private JTextField passwordTF;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Add Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ private JPanel addQP;
private JPanel addQP;
private JLabel instructionsL;
private JLabel txtL;
private JLabel infoL;
private JButton appendB;
private JButton overwriteB;
private JTextField pathTF;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel questionP;
private JLabel qNumL;
private JLabel groupL;
private JLabel questionL;
private JLabel opt1L;
private JLabel opt2L;
private JLabel opt3L;
private JLabel opt4L;
private JButton opt1B;
private JButton opt2B;
private JButton opt3B;
private JButton opt4B;
String qNumber = "3";
String group = "JDBC";
String question = "This is the question";
String opt1 = "This is option 1";
String opt2 = "This is option 2";
String opt3 = "This is option 3";
String opt4 = "This is option 4";
String a = "a.";
String b = "b.";
String c = "c.";
String d = "d.";
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Viewer Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel viewerP;
private JLabel aL;
private JLabel bL;
private JLabel cL;
private JLabel dL;
private JButton nextB;
private JButton closeB;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Select Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel selectQP;
private JLabel instruct1L;
private JLabel askL;
private JCheckBox checkBox1;
private JCheckBox checkBox2;
private JCheckBox checkBox3;
private JCheckBox checkBox4;
private JButton viewB;
private JButton startB;
private JTextField numOfQTF;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private JPanel markP;
private JLabel percentageL;
private JLabel outOfL;
private JButton backB;
private JButton logOutB;
Connection con;
Statement stmt;
ResultSet rs;
/*#################################################################################################################################################################
*#########################################################################Panels##################################################################################
*###############################################################################################################################################################*/
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Login Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
GUI gui = new GUI();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setSize(600, 400);
gui.setResizable(true);
gui.setVisible(true);
}
});
}
public GUI() {
super("Tester");
loginP = new JPanel();
GroupLayout loginPLayout = new GroupLayout(loginP);
loginP.setLayout(loginPLayout);
loginPLayout.setAutoCreateGaps(true);
loginPLayout.setAutoCreateContainerGaps(true);
Font font = new Font("Freestyle Script", Font.PLAIN,80);
titleL = new JLabel("Tester");
titleL.setFont(font);
instructL = new JLabel("Please eneter your name and password and select your login type to login.");
usernameL = new JLabel("Username:");
passwordL = new JLabel("Password:");
loginL = new JLabel("Login as");
studentB = new JButton("Student");
lecturerB = new JButton("Lecturer");
usernameTF = new JTextField("", 100);
passwordTF = new JTextField("", 100);
studentB.addActionListener(new studentH());
lecturerB.addActionListener(new lecturerH());
loginPLayout.setHorizontalGroup(loginPLayout.createSequentialGroup()
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(usernameL)
.addComponent(passwordL))
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.CENTER)
.addComponent(titleL)
.addComponent(instructL)
.addComponent(usernameTF)
.addComponent(passwordTF)
.addComponent(loginL)
.addGroup(loginPLayout.createSequentialGroup()
.addComponent(studentB)
.addComponent(lecturerB)))
);
loginPLayout.setVerticalGroup(loginPLayout.createSequentialGroup()
.addComponent(titleL)
.addComponent(instructL)
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(usernameL)
.addComponent(usernameTF))
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(passwordL)
.addComponent(passwordTF))
.addComponent(loginL)
.addGroup(loginPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(studentB)
.addComponent(lecturerB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Select Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
selectQP = new JPanel();
GroupLayout selectQPLayout = new GroupLayout(selectQP);
selectQP.setLayout(selectQPLayout);
selectQPLayout.setAutoCreateGaps(true);
selectQPLayout.setAutoCreateContainerGaps(true);
String cat1 = "Collections";
String cat2 = "Multithreading";
String cat3 = "Networking";
String cat4 = "JDBC";
instruct1L = new JLabel("Select the groups of questions you would like to be tested on");
askL = new JLabel("How many questions would you like?");
checkBox1 = new JCheckBox(cat1);
checkBox2 = new JCheckBox(cat2);
checkBox3 = new JCheckBox(cat3);
checkBox4 = new JCheckBox(cat4);
viewB = new JButton("View Questions");
startB = new JButton("Start Test");
numOfQTF = new JTextField("", 100);
viewB.addActionListener(new viewH());
startB.addActionListener(new startH());
selectQPLayout.setHorizontalGroup(selectQPLayout.createParallelGroup()
.addComponent(instruct1L)
.addComponent(checkBox1)
.addComponent(checkBox2)
.addComponent(checkBox3)
.addComponent(checkBox4)
.addComponent(askL)
.addComponent(numOfQTF)
.addGroup(selectQPLayout.createSequentialGroup()
.addComponent(viewB)
.addComponent(startB))
);
selectQPLayout.setVerticalGroup(selectQPLayout.createSequentialGroup()
.addComponent(instruct1L)
.addComponent(checkBox1)
.addComponent(checkBox2)
.addComponent(checkBox3)
.addComponent(checkBox4)
.addComponent(askL)
.addComponent(numOfQTF)
.addGroup(selectQPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(viewB)
.addComponent(startB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Add Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
addQP = new JPanel();
GroupLayout addQPLayout = new GroupLayout(addQP);
addQP.setLayout(addQPLayout);
addQPLayout.setAutoCreateGaps(true);
addQPLayout.setAutoCreateContainerGaps(true);
instructionsL = new JLabel("Please enter the name of the file:");
txtL = new JLabel(".txt");
infoL = new JLabel("You will be logged out after the questions have been added.");
appendB = new JButton("Append Questions");
overwriteB = new JButton("Overwrite Questions");
pathTF = new JTextField("", 100);
appendB.addActionListener(new appendH());
overwriteB.addActionListener(new overwriteH());
addQPLayout.setHorizontalGroup(addQPLayout.createSequentialGroup()
.addGroup(addQPLayout.createParallelGroup(GroupLayout.Alignment.CENTER)
.addComponent(instructionsL)
.addGroup(addQPLayout.createSequentialGroup()
.addComponent(pathTF)
.addComponent(txtL))
.addComponent(infoL)
.addGroup(addQPLayout.createSequentialGroup()
.addComponent(appendB)
.addComponent(overwriteB)))
);
addQPLayout.setVerticalGroup(addQPLayout.createSequentialGroup()
.addComponent(instructionsL)
.addGroup(addQPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(pathTF)
.addComponent(txtL))
.addComponent(infoL)
.addGroup(addQPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(appendB)
.addComponent(overwriteB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
qNumL = new JLabel("Question Number: " + qNumber);
groupL = new JLabel("Group: " + group);
questionL = new JLabel(question);
opt1L = new JLabel(opt1);
opt2L = new JLabel(opt2);
opt3L = new JLabel(opt3);
opt4L = new JLabel(opt4);
opt1B = new JButton("A");
opt2B = new JButton("B");
opt3B = new JButton("C");
opt4B = new JButton("D");
questionP = new JPanel();
// add(questionP);
GroupLayout questionPLayout = new GroupLayout(questionP);
questionP.setLayout(questionPLayout);
questionPLayout.setAutoCreateGaps(true);
questionPLayout.setAutoCreateContainerGaps(true);
optH handler = new optH();
opt1B.addActionListener(handler);
//opt2B.addActionListener(handler);
//opt3B.addActionListener(handler);
//opt4B.addActionListener(handler);
questionPLayout.setHorizontalGroup(questionPLayout.createSequentialGroup()
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(questionL)
.addComponent(opt1B)
.addComponent(opt2B)
.addComponent(opt3B)
.addComponent(opt4B))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(opt1L)
.addComponent(opt2L)
.addComponent(opt3L)
.addComponent(opt4L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.TRAILING)
.addComponent(groupL))
);
questionPLayout.setVerticalGroup(questionPLayout.createSequentialGroup()
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(groupL))
.addComponent(questionL)
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt1B)
.addComponent(opt1L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt2B)
.addComponent(opt2L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt3B)
.addComponent(opt3L))
.addGroup(questionPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(opt4B)
.addComponent(opt4L))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Viewer Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
qNumL = new JLabel("Question Number: " + qNumber);
groupL = new JLabel("Group: " + group);
questionL = new JLabel(question);
aL = new JLabel("A");
bL = new JLabel("B");
cL = new JLabel("C");
dL = new JLabel("D");
opt1L = new JLabel(opt1);
opt2L = new JLabel(opt2);
opt3L = new JLabel(opt3);
opt4L = new JLabel(opt4);
nextB = new JButton("Next");
closeB = new JButton("Close");
viewerP = new JPanel();
GroupLayout viewerPLayout = new GroupLayout(viewerP);
viewerP.setLayout(viewerPLayout);
viewerPLayout.setAutoCreateGaps(true);
viewerPLayout.setAutoCreateContainerGaps(true);
viewerPLayout.setHorizontalGroup(viewerPLayout.createSequentialGroup()
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(questionL)
.addComponent(aL)
.addComponent(bL)
.addComponent(cL)
.addComponent(dL))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(opt1L)
.addComponent(opt2L)
.addComponent(opt3L)
.addComponent(opt4L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.TRAILING)
.addComponent(groupL)
.addGroup(viewerPLayout.createSequentialGroup()
.addComponent(nextB)
.addComponent(closeB)))
);
viewerPLayout.setVerticalGroup(viewerPLayout.createSequentialGroup()
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(qNumL)
.addComponent(groupL))
.addComponent(questionL)
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(aL)
.addComponent(opt1L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(bL)
.addComponent(opt2L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(cL)
.addComponent(opt3L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(dL)
.addComponent(opt4L))
.addGroup(viewerPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(nextB)
.addComponent(closeB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
markP = new JPanel();
GroupLayout markPLayout = new GroupLayout(markP);
markP.setLayout(markPLayout);
markPLayout.setAutoCreateGaps(true);
markPLayout.setAutoCreateContainerGaps(true);
int percentage = 90;
int correct = 9;
int total = 10;
percentageL = new JLabel("You scored: " + percentage + "%");
outOfL = new JLabel("You have " + correct + " corret answers out of a possible " + total);
backB = new JButton("Back to Group Selection");
logOutB = new JButton("Log Out");
backB.addActionListener(new backH());
logOutB.addActionListener(new logOutH());
markPLayout.setHorizontalGroup(markPLayout.createParallelGroup()
.addComponent(percentageL)
.addComponent(outOfL)
.addGroup(markPLayout.createSequentialGroup()
.addComponent(backB)
.addComponent(logOutB))
);
markPLayout.setVerticalGroup(markPLayout.createSequentialGroup()
.addComponent(percentageL)
.addComponent(outOfL)
.addGroup(markPLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(backB)
.addComponent(logOutB))
);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Card Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cardPanel = new JPanel(new CardLayout(0,0));
JPanel[] cards = new JPanel[6];
String[] titles = new String[6];
cards[0] = loginP;
cards[1] = selectQP;
cards[2] = addQP;
cards[3] = questionP;
cards[4] = viewerP;
cards[5] = markP;
titles[0] = "loginP";
titles[1] = "selectQP";
titles[2] = "addQP";
titles[3] = "questionP";
titles[4] = "viewerP";
titles[5] = "markP";
for(int i = 0; i < cards.length; i++) {
cardPanel.add(cards[i], titles[i]);
}
//You can remove this once you are satisfied card layout works with your buttons - this is just for the combobox I added
setLayout(new BorderLayout());
add(cardPanel, BorderLayout.CENTER);
comboBox = new JComboBox<>(titles);
comboBox.addActionListener(new CardListener());
add(comboBox, BorderLayout.NORTH);
//Add this back in once you remove the rest
// add(cardPanel);
pack();
}
//You can remove this once you are satisfied card layout works with your buttons - this is just for the combobox I added
private class CardListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
CardLayout c1 = (CardLayout)(cardPanel.getLayout());
c1.show(cardPanel, (String)comboBox.getSelectedItem());
}
}
/*#################################################################################################################################################################
*#####################################################################Action Listeners############################################################################
*###############################################################################################################################################################*/
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Login Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class studentH implements ActionListener {
@Override
public void actionPerformed(ActionEvent event) {
Student stu = new Student();
String username = usernameTF.getText();
String password = passwordTF.getText();
boolean correct = stu.Student(username, password);
if(correct == true) {
changeCard("selectQP");
}
else {
JOptionPane.showMessageDialog(null, "You have entered incorect details. Please try again", "Incorrect Details", JOptionPane.ERROR_MESSAGE);
usernameTF.setText("");
passwordTF.setText("");
}
}
}
private class lecturerH implements ActionListener {
@Override
public void actionPerformed(ActionEvent event) {
Lecturer lect = new Lecturer();
String username = usernameTF.getText();
String password = passwordTF.getText();
boolean correct = lect.Lecturer(username, password);
if(correct == true) {
changeCard("addQP");
}
else {
JOptionPane.showMessageDialog(null, "You have entered incorect details. Please try again", "Incorrect Details", JOptionPane.ERROR_MESSAGE);
usernameTF.setText("");
passwordTF.setText("");
}
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Add Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class appendH implements ActionListener {
@Override
public void actionPerformed(ActionEvent event) {
//Append appen = new Append();
String path = pathTF.getText();
//appen.Append(path);
}
}
private class overwriteH implements ActionListener {
@Override
public void actionPerformed(ActionEvent event) {
// Overwrite over = new Overwrite();
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class optH implements ActionListener {
@Override
public void actionPerformed( ActionEvent event ) {
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Select Question Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class viewH implements ActionListener {
@Override
public void actionPerformed( ActionEvent event ) {
}
}
private class startH implements ActionListener {
@Override
public void actionPerformed( ActionEvent event ) {
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Panel ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private class backH implements ActionListener {
@Override
public void actionPerformed( ActionEvent event ) {
}
}
private class logOutH implements ActionListener {
@Override
public void actionPerformed( ActionEvent event ) {
}
}
private void changeCard(String newCardName) {
CardLayout c1 = (CardLayout)(cardPanel.getLayout());
c1.show(cardPanel, newCardName);
}
}
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