I'm working on a question that simply states to make an GUI that looks like This calculator, it doesn't have to function, just look like it. So I think I have the JPanel and JButton components right but I can't organize the fields to make it come out right. I'm pretty new so any crash course on how to organize a GUI would be appreciated.
Here's what I have so far:
// Using a JPanel to help lay out components.
import java.awt.GridLayout;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JTextField;
public class Calculator extends JFrame
{
private final JPanel buttonJPanel2, buttonJPanel3, buttonJPanel4,
buttonJPanel5; // panel to hold buttons
private final JButton[] buttons3, buttons4, buttons5;
private final JButton[] buttons2;
private final JTextField buttonJPanel1;
// no-argument constructor
public Calculator()
{
super("Calculator");
buttonJPanel1 = new JTextField();
add(buttonJPanel1, BorderLayout.NORTH); // add panel1 to JFrame
buttons2 = new JButton[4];
buttons2[0] = new JButton("7");
buttons2[1] = new JButton("8");
buttons2[2] = new JButton("9");
buttons2[3] = new JButton("/");
buttonJPanel2 = new JPanel();
buttonJPanel2.setLayout(new GridLayout(1, buttons2.length));
add(buttonJPanel2, BorderLayout.AFTER_LAST_LINE); // add panel2 to JFrame
buttons3 = new JButton[4];
buttons3[0] = new JButton("4");
buttons3[1] = new JButton("5");
buttons3[2] = new JButton("6");
buttons3[3] = new JButton("*");
buttonJPanel3 = new JPanel();
buttonJPanel3.setLayout(new GridLayout(1, buttons3.length));
add(buttonJPanel3, BorderLayout.AFTER_LAST_LINE); // add panel3 to JFrame
buttons4 = new JButton[4];
buttons4[0] = new JButton("1");
buttons4[1] = new JButton("2");
buttons4[2] = new JButton("3");
buttons4[3] = new JButton("-");
buttonJPanel4 = new JPanel();
buttonJPanel4.setLayout(new GridLayout(1, buttons4.length));
add(buttonJPanel4, BorderLayout.AFTER_LAST_LINE); // add panel4 to JFrame
buttons5 = new JButton[4];
buttons2[0] = new JButton("0");
buttons5[1] = new JButton(".");
buttons5[2] = new JButton("=");
buttons5[3] = new JButton("+");
buttonJPanel5 = new JPanel();
buttonJPanel5.setLayout(new GridLayout(1, buttons5.length));
add(buttonJPanel5, BorderLayout.AFTER_LAST_LINE); // add panel5 to
//JFrame
}
public static void main(String[] args)
{
PanelFrame panelFrame = new PanelFrame();
panelFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panelFrame.setSize(700, 500);
panelFrame.setVisible(true);
}
} // end class PanelFrame
In short: every component has to be declared,
JButton button1;
initialized
button1 = new JButton("Click me!");
and added to the component above it in the hierarchy (in this case the panel)
panel1.add(button1);
If you do not add the components to the panel and the panel to the frame they will not be part of the GUI, thus not visible.
A JPanel can be set to adjust its layout in different ways using a LayoutManager as you have done with GridLayout (which seems fitting for a calculator). I suggest you read about how to use the grid layout here.
Hope I could help :)
You need to add the buttons to the `JPanel'. For example:
for(JButton b : buttons2) { buttonJPanel2.add(b); }
BorderLayout accepts one component at each location, so if you set BorderLayout.AFTER_LAST_LINE twice, the last add overwrites previous one.
Related
Stupid question, but I cant seem to find answer, and when I do it doesn't work. So i want to add new JPanel on already existing JPanel. Sometimes when i add it it just opens a new window when I run it, other times nothing happens. Anyways here is the code:
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Main extends JFrame {
private static final long serialVersionUID = 1L;
public static void main(String[] args)
{
new Main().setVisible(true);
}
private Main()
{
super("Vending machine");
JPanel p = new JPanel();
JLabel title = new JLabel("Vending machine: ");
JButton button1 = new JButton("1");
JButton button2 = new JButton("2");
JButton button3 = new JButton("5");
JLabel label1 = new JLabel("Enter code: ");
JTextField text1= new JTextField(3);
JButton ok= new JButton("OK");
JButton button4 = new JButton("Return change");
JLabel label2 = new JLabel("Result is: ");
JTextField text2= new JTextField(3);
JLabel label3 = new JLabel("Current: ");
JTextField text3= new JTextField(3);
title.setBounds(200,5,250,80);
title.setFont (title.getFont ().deriveFont (22.0f));
p.add(title);
p.setLayout(null);
button1.setBounds(530,46,120,60);
p.add(button1);
button2.setBounds(530,172,120,60);
p.add(button2);
button3.setBounds(530,298,120,60);
p.add(button3);
label1.setBounds(555,414,120,60);
p.add(label1);
text1.setBounds(530,454,120,30);
p.add(text1);
ok.setBounds(530,550,120,60);
p.add(ok);
button4.setBounds(360,550,120,60);
p.add(button4);
label2.setBounds(230,530,120,60);
p.add(label2);
text2.setBounds(200,575,120,30);
p.add(text2);
label3.setBounds(50,530,120,60);
p.add(label3);
text3.setBounds(38,575,120,30);
p.add(text3);
getContentPane().add(p);
setSize(700,700);
setVisible(true);
}
}
I want to add new JPanel on this place: vending machine:
Thank you!
Even if you could do this, it will give you harm for every time you want another changes on this frame.
Instead of locating a JPanel into another JPanel, use layouts.
You shouldnt use static variables and a null layout.
Use appropriate layout managers. Maybe the main panel uses a BorderLayout. Then you add your main component to the CENTER and a second panel to the EAST. The second panel can also use a BorderLayout. You can then add the two components to the NORTH, CENTER or SOUTH as you require.
So, I'm brand spankin' new to programming, so thanks in advance for your help. I'm trying to put this base 2 to base 10/base 10 to base 2 calculator I have made into a GUI. For the life of me I can't figure out how to nicely format it. I'm trying to make it look like the following: The two radio buttons on top, the input textfield bellow those, the convert button bellow that, the output field bellow that, and the clear button bellow that. Any ideas on how I can accomplish this?
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.*;
#SuppressWarnings("serial")
public class GUI extends JFrame implements ActionListener
{
private JTextField input;
private JTextField output;
private JRadioButton base2Button;
private JRadioButton base10Button;
private JButton convert;
private JButton clear;
private Container canvas = getContentPane();
private Color GRAY;
public GUI()
{
this.setTitle("Base 10-2 calc");
this.setLayout(new FlowLayout(FlowLayout.LEFT));
//this.setLayout(new GridLayout(2,2));
base2Button = new JRadioButton( "Convert to base 2");
base10Button = new JRadioButton( "Convert to base 10");
ButtonGroup radioGroup = new ButtonGroup();
radioGroup.add(base2Button);
radioGroup.add(base10Button);
JPanel radioButtonsPanel = new JPanel();
radioButtonsPanel.setLayout( new FlowLayout(FlowLayout.LEFT) );
radioButtonsPanel.add(base2Button);
radioButtonsPanel.add(base10Button);
canvas.add(radioButtonsPanel);
base2Button.setSelected( true );
base10Button.setSelected( true );
input = new JTextField(18);
//input = new JFormattedTextField(20);
canvas.add(input);
output = new JTextField(18);
//output = new JFormattedTextField(20);
canvas.add(output);
convert = new JButton("Convert!");
convert.addActionListener(this);
canvas.add(convert);
clear = new JButton("Clear");
clear.addActionListener(this);
canvas.add(clear);
output.setBackground(GRAY);
output.setEditable(false);
this.setSize(300, 200);
this.setVisible(true);
this.setLocation(99, 101);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args)
{
GUI app = new GUI();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
#Override
public void actionPerformed(ActionEvent e)
{
String s = e.getActionCommand();
if(s.equals("Convert!"))
{
String numS = input.getText();
int numI = Integer.parseInt(numS);
if(base2Button.isSelected())
{
output.setText(Integer.toBinaryString(Integer.valueOf(numI)));
}
if(base10Button.isSelected())
{
output.setText("" + Integer.valueOf(numS,2));
}
}
if(s.equals("Clear"))
{
input.setText("");
output.setText("");
}
}
}
For a simple layout, you could use a GridLayout with one column and then use a bunch of child panels with FlowLayout which align the components based on the available space in a single row. If you want more control, I'd suggest learning about the GridBagLayout manager which is a more flexible version of GridLayout.
public class ExampleGUI {
public ExampleGUI() {
init();
}
private void init() {
JFrame frame = new JFrame();
// Set the frame's layout to a GridLayout with one column
frame.setLayout(new GridLayout(0, 1));
frame.setPreferredSize(new Dimension(300, 300));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Child panels, each with FlowLayout(), which aligns the components
// in a single row, until there's no more space
JPanel radioButtonPanel = new JPanel(new FlowLayout());
JRadioButton button1 = new JRadioButton("Option 1");
JRadioButton button2 = new JRadioButton("Option 2");
radioButtonPanel.add(button1);
radioButtonPanel.add(button2);
JPanel inputPanel = new JPanel(new FlowLayout());
JLabel inputLabel = new JLabel("Input: ");
JTextField textField1 = new JTextField(15);
inputPanel.add(inputLabel);
inputPanel.add(textField1);
JPanel convertPanel = new JPanel(new FlowLayout());
JButton convertButton = new JButton("Convert");
convertPanel.add(convertButton);
JPanel outputPanel = new JPanel(new FlowLayout());
JLabel outputLabel = new JLabel("Output: ");
JTextField textField2 = new JTextField(15);
outputPanel.add(outputLabel);
outputPanel.add(textField2);
// Add the child panels to the frame, in order, which all get placed
// in a single column
frame.add(radioButtonPanel);
frame.add(inputPanel);
frame.add(convertPanel);
frame.add(outputPanel);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
ExampleGUI example = new ExampleGUI();
}
}
The end result:
I am having a problem with BorderLayout, that was set to the green JPanel side. It does not display elements on the EAST in a row order. Do I have to combine this with GridBagLayout ? Could someone advice me how should I tackle this problem?
Basically the problem is of displaying objects inside green area below when I am using
Current layout:
My aim is to achieve this layout:
public class GUILayout {
public static void main(String[] args) {
JFrame jf = new JFrame();
JButton jbO = new JButton("CSIS0396");
JButton jbl = new JButton("Final");
JButton jb2 = new JButton("2010");
JButton jb3 = new JButton("Exam");
JPanel panel = new JPanel();
JPanel panel2 = new JPanel();
JButton object_btn = new JButton("Object");
JButton oriented_btn = new JButton("Oriented");
JButton programming_btn = new JButton("Programming");
JButton and_btn = new JButton("and");
JButton java_btn = new JButton("Java");
BorderLayout layout = new BorderLayout();
panel.setLayout(layout);
panel2.setLayout(layout);
panel.add(BorderLayout.CENTER,object_btn);
panel.add(BorderLayout.WEST,oriented_btn);
panel.add(BorderLayout.WEST,programming_btn);
panel.add(BorderLayout.WEST,and_btn);
panel.add(BorderLayout.WEST,java_btn);
panel2.add(BorderLayout.NORTH, jbO);
panel2.add(BorderLayout.SOUTH, jb2);
panel2.add(BorderLayout.WEST, jbl);
panel2.add(BorderLayout.EAST, jb3);
panel.setBackground(Color.GREEN);
panel2.setBackground(Color.RED);
jf.getContentPane().add(panel);
jf.getContentPane().add(panel2, BorderLayout.EAST);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setSize(400, 300);
jf.setVisible(true);
}
}
don't share same layout for multiple component and use box layout for left panel to positioning buttons
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class GUILayout {
public static void main(String[] args) {
JFrame jf = new JFrame();
JButton jbO = new JButton("CSIS0396");
JButton jbl = new JButton("Final");
JButton jb2 = new JButton("2010");
JButton jb3 = new JButton("Exam");
JPanel panel = new JPanel();
JPanel panel2 = new JPanel();
JButton object_btn = new JButton("Object");
JButton oriented_btn = new JButton("Oriented");
JButton programming_btn = new JButton("Programming");
JButton and_btn = new JButton("and");
JButton java_btn = new JButton("Java");
BorderLayout layout = new BorderLayout();
panel2.setLayout(layout);
panel.setLayout( new BoxLayout(panel, BoxLayout.PAGE_AXIS));
panel.add(object_btn);
panel.add(oriented_btn);
panel.add(programming_btn);
panel.add(and_btn);
panel.add(java_btn);
panel2.add(BorderLayout.NORTH, jbO);
panel2.add(BorderLayout.SOUTH, jb2);
panel2.add(BorderLayout.WEST, jbl);
panel2.add(BorderLayout.EAST, jb3);
panel.setBackground(Color.GREEN);
panel2.setBackground(Color.RED);
jf.setLayout(new BorderLayout());
jf.getContentPane().add(panel ,BorderLayout.WEST);
jf.getContentPane().add(panel2, BorderLayout.EAST);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setSize(400, 300);
jf.setVisible(true);
}
}
The first problem is that you're having your panels share a layout. You must use a new BorderLayout for each of them.
The second problem is that a BorderLayout can only have one component in each constraint position. When you try to add multiple components to the WEST position, each one replaces the one that was previously in that position:
panel.add(BorderLayout.WEST,oriented_btn);
// Implicitly removes oriented_btn from panel
panel.add(BorderLayout.WEST,programming_btn);
// Implicitly removes programming_btn from panel
panel.add(BorderLayout.WEST,and_btn);
// Implicitly removes and_btn from panel
panel.add(BorderLayout.WEST,java_btn);
The solution is to put them in their own container, such as a Box or a JPanel with a GridLayout:
Box box = Box.createVerticalBox();
// Or:
//JComponent box = new JPanel(new GridLayout(0, 1));
box.add(oriented_btn);
box.add(programming_btn);
box.add(and_btn);
box.add(java_btn);
panel.add(BorderLayout.WEST, box);
I am part of team that is creating a test for students to get used to a certain format before they have to take a certification test. The test is four hours long and as I am trying to implement the timer I am seeing unusual patterns.
I expect the timer to start at 4 hours (in HH:MM:SS format) and count down to all zeros, unfortunately it is starting at 11:00:00 and counting down to 07:00:00.
The next problem is the timer has to be shown between two different pages. The actual taking of the exam and a review page. When I toggle back and fourth between the pages the counter starts decrementing by the multiple of times clicked between pages.
Below is my created timer class, take quiz and submit review. The code is not perfect and needs work but I needed a GUI mock up to present.
Any help would be appreciated. Thank you.
TAKE QUIZ
package edu.kings.pexam.student;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
public class TakeQuiz extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JButton submit;
private JButton show;
static QuizTimer timer;
/**
* #param args
*/
public static void main(String[] args){
TakeQuiz window = new TakeQuiz();
window.setVisible(true);
}
public TakeQuiz(){
setExtendedState(JFrame.MAXIMIZED_BOTH);
JPanel upperPanel = new JPanel(new GridLayout(2,8));
upperPanel.setPreferredSize(new Dimension(WIDTH,100));
upperPanel.setBackground(Color.lightGray);
this.add(upperPanel,BorderLayout.NORTH);
JPanel lowerPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
lowerPanel.setBackground(Color.white);
this.add(lowerPanel, BorderLayout.CENTER);
Font font = new Font("Dialog",Font.PLAIN,17);
Font buttonFont = new Font("Dialog",Font.PLAIN,13);
Font textButtonFont = new Font("Dialog",Font.PLAIN+Font.BOLD,13);
Font submitButtonFont = new Font("Dialog", Font.PLAIN + Font.BOLD,15);
//adding the questions buttons to the upper panel
JPanel questionPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
questionPanel.setBackground(Color.lightGray);
JButton firstQuestion = new JButton("<<");
firstQuestion.setFont(buttonFont);
questionPanel.add(firstQuestion);
//space to help button line up with text
JPanel spacer1 = new JPanel();
spacer1.setBackground(Color.lightGray);
questionPanel.add(spacer1);
JButton perviousQuestion = new JButton("<");
perviousQuestion.setFont(buttonFont);
questionPanel.add(perviousQuestion);
//space to help button line up with text
JPanel spacer2 = new JPanel();
spacer2.setBackground(Color.lightGray);
questionPanel.add(spacer2);
JButton nextQuestion = new JButton(">");
nextQuestion.setFont(buttonFont);
questionPanel.add(nextQuestion);
//space to help button line up with text
JPanel spacer3 = new JPanel();
spacer3.setBackground(Color.lightGray);
questionPanel.add(spacer3);
JButton lastQuestion = new JButton(">>");
lastQuestion.setFont(buttonFont);
questionPanel.add(lastQuestion);
upperPanel.add(questionPanel);
//adding the goto button to the upper panel
JPanel goToPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
goToPanel.setBackground(Color.lightGray);
JButton goTo = new JButton("Go To");
goTo.setFont(textButtonFont);
goToPanel.add(goTo);
upperPanel.add(goToPanel);
//adding the flag buttons to the upper panel
JPanel flagPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
flagPanel.setBackground(Color.lightGray);
JButton flagP = new JButton("< Flag");
flagP.setFont(textButtonFont);
flagPanel.add(flagP);
JButton flag = new JButton("Flag");
flag.setFont(textButtonFont);
flagPanel.add(flag);
JButton flagN = new JButton("Flag >");
flagN.setFont(textButtonFont);
flagPanel.add(flagN);
upperPanel.add(flagPanel);
//adding help and hide/show timer buttons to the upper panel
JPanel timerPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
timerPanel.setBackground(Color.lightGray);
JButton help = new JButton("Help");
help.setFont(textButtonFont);
timerPanel.add(help);
show = new JButton("Show/Hide Timer");
show.setFont(textButtonFont);
show.addActionListener(this);
timerPanel.add(show);
upperPanel.add(timerPanel);
//adding space panels
JPanel spacePanel1 = new JPanel();
JPanel spacePanel2 = new JPanel();
spacePanel1.setBackground(Color.lightGray);
spacePanel2.setBackground(Color.lightGray);
upperPanel.add(spacePanel1);
upperPanel.add(spacePanel2);
//adding the submit button to the upper panel
JPanel submitPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
submitPanel.setBackground(Color.lightGray);
submit = new JButton("Submit Quiz");
submit.setFont(submitButtonFont);
submit.addActionListener(this);
submitPanel.add(submit);
upperPanel.add(submitPanel);
//adding the question button text to the upper panel
JPanel questionText = new JPanel(new FlowLayout(FlowLayout.LEFT));
questionText.setBackground(Color.lightGray);
JLabel label2 = new JLabel("<html><center>First<br></br>Question</center></html>");
label2.setFont(textButtonFont);
questionText.add(label2);
JLabel label4 = new JLabel("<html><center>Perivous<br></br>Question</center></html>");
label4.setFont(textButtonFont);
questionText.add(label4);
JLabel label6 = new JLabel("<html><center>Next<br></br>Question</center></html>");
label6.setFont(textButtonFont);
questionText.add(label6);
JLabel label8 = new JLabel("<html><center>Last<br></br>Question</center></html>");
label8.setFont(textButtonFont);
questionText.add(label8);
upperPanel.add(questionText);
//adding text box for go to button
JPanel textGoTo = new JPanel(new FlowLayout(FlowLayout.CENTER));
textGoTo.setBackground(Color.lightGray);
JPanel upper10 = new JPanel();
upper10.setBackground(Color.lightGray);
JTextField goToText = new JTextField("1",2);
JLabel label10 = new JLabel("/25");
label10.setFont(font);
upper10.add(goToText,BorderLayout.CENTER);
upper10.add(label10,BorderLayout.CENTER);
textGoTo.add(upper10);
upperPanel.add(textGoTo);
//adding spacer to the upper panel
JPanel spacePanel3 = new JPanel();
spacePanel3.setBackground(Color.lightGray);
upperPanel.add(spacePanel3);
//adding the timer to the upper panel
JPanel timePanel = new JPanel();
timePanel.setBackground(Color.lightGray);
timer = new QuizTimer();
timer.start();
JPanel upper20 = new JPanel();
upper20.setBackground(Color.lightGray);
upper20.add(timer.getTimeLabel(),BorderLayout.CENTER);
timePanel.add(upper20);
upperPanel.add(timePanel);
//adding two more space panels
JPanel spacePanel4 = new JPanel();
JPanel spacePanel5 = new JPanel();
spacePanel4.setBackground(Color.lightGray);
spacePanel5.setBackground(Color.lightGray);
upperPanel.add(spacePanel4);
upperPanel.add(spacePanel5);
//adding the questions to the lower panel
JPanel lower1 = new JPanel(new GridLayout(4,1));
lower1.setBackground(Color.white);
JLabel question = new JLabel("<html>The parents of a 16-year-old swimmer contact an athletic trainer seeking nutritional advice for the athlete's pre-event<br><\bmeal. What recommendation should the athletic trainer share share with the parents regrading ideal pre-event meals?</html>");
question.setFont(new Font("Dialog", Font.PLAIN+Font.BOLD, 18));
JPanel answer = new JPanel(new GridLayout(6,1));
answer.setBackground(Color.white);
JLabel type = new JLabel("Choose all that apply.");
type.setFont(new Font("Dialog", Font.PLAIN+Font.BOLD+Font.ITALIC, 20));
JPanel answerA = new JPanel(new FlowLayout(FlowLayout.LEFT));
answerA.setBackground(Color.white);
JRadioButton a = new JRadioButton();
a.setBackground(Color.white);
a.setSize(25,25);
JLabel aFill = new JLabel("Include foods high in carbohydrates, high in proteins , and low in fats");
aFill.setFont(font);
answerA.add(a);
answerA.add(aFill);
JPanel answerB = new JPanel(new FlowLayout(FlowLayout.LEFT));
answerB.setBackground(Color.white);
JRadioButton b = new JRadioButton();
b.setBackground(Color.white);
b.setSize(25,25);
JLabel bFill = new JLabel("Prepare meals without diuretics foods");
bFill.setFont(font);
answerB.add(b);
answerB.add(bFill);
JPanel answerC = new JPanel(new FlowLayout(FlowLayout.LEFT));
answerC.setBackground(Color.white);
JRadioButton c = new JRadioButton();
c.setBackground(Color.white);
c.setSize(25,25);
JLabel cFill = new JLabel("Prepare meals for eating four hours prior to the competition");
cFill.setFont(font);
answerC.add(c);
answerC.add(cFill);
JPanel answerD = new JPanel(new FlowLayout(FlowLayout.LEFT));
answerD.setBackground(Color.white);
JRadioButton d = new JRadioButton();
d.setBackground(Color.white);
d.setSize(25,25);
JLabel dFill = new JLabel("Prepare meals with food that delay gastric emptying");
dFill.setFont(font);
answerD.add(d);
answerD.add(dFill);
JPanel record = new JPanel(new FlowLayout(FlowLayout.LEFT));
record.setBackground(Color.lightGray);
JLabel unanswered = new JLabel("Unanswered: ");
unanswered.setFont(font);
record.add(unanswered);
JLabel unansweredNumber = new JLabel("25");
unansweredNumber.setFont(font);
unansweredNumber.setForeground(Color.blue);
record.add(unansweredNumber);
JLabel space1 = new JLabel();
record.add(space1);
JLabel answered = new JLabel("Answered: ");
answered.setFont(font);
record.add(answered);
JLabel answeredNumber = new JLabel("0");
answeredNumber.setFont(font);
answeredNumber.setForeground(Color.blue);
record.add(answeredNumber);
JLabel space2 = new JLabel();
record.add(space2);
JLabel flagged = new JLabel("Flagged: ");
flagged.setFont(font);
record.add(flagged);
JLabel flaggedNumber = new JLabel("0");
flaggedNumber.setFont(font);
flaggedNumber.setForeground(Color.blue);
record.add(flaggedNumber);
answer.add(type);
answer.add(answerA);
answer.add(answerB);
answer.add(answerC);
answer.add(answerD);
answer.add(record);
lower1.add(question);
lower1.add(answer);
lowerPanel.add(lower1);
getContentPane().setBackground(Color.white);
upperPanel.setVisible(true);
lowerPanel.setVisible(true);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
#Override
public void actionPerformed(ActionEvent e) {
if(e.getSource() == submit){
SubmitReview reviewScreen = new SubmitReview();
this.setVisible(false);
reviewScreen.setVisible(true);
}else if(e.getSource() == show){
if(timer.getTimeLabel().isVisible() == true){
timer.getTimeLabel().setVisible(false);
}else{
timer.getTimeLabel().setVisible(true);
}
}
}
}
FINAL SUBMIT
package edu.kings.pexam.student;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class SubmitReview extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JButton hideTimerButton;
private JButton showTimerButton;
private JComboBox<String> languageBox;
private JButton returnToQuizButton;
private JButton endQuizButton;
private JTextField textEnter;
static QuizTimer timer = TakeQuiz.timer;
/**
* Runs the program to produce the screen for submission review.
* #param args
*/
public static void main(String[] args){
SubmitReview window = new SubmitReview();
//sets the window visible
window.setVisible(true);
}
public SubmitReview(){
//Extends the screen to maximum size
setExtendedState(JFrame.MAXIMIZED_BOTH);
//Creates a panel that will keep items pushed to the right.
JPanel leftPanel = new JPanel();
leftPanel.setPreferredSize(new Dimension(200,HEIGHT));
leftPanel.setBackground(Color.white);
this.add(leftPanel,BorderLayout.WEST);
//Panel where everything on page will go.
JPanel rightPanel = new JPanel(new GridLayout(10,1));
rightPanel.setBackground(Color.white);
this.add(rightPanel, BorderLayout.CENTER);
//font for the text
Font textFont = new Font("Dialog",Font.PLAIN,15);
//First panel in the grid. Grid moves from top to bottom.
JPanel panel0 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
panel0.setBackground(Color.white);
//hide timer button, visible when timer is shown.
hideTimerButton = new JButton("Hide Timer");
hideTimerButton.setBackground(Color.lightGray);
Dimension hideTimerDimension = new Dimension(100,25);
hideTimerButton.setSize(hideTimerDimension);
hideTimerButton.setMinimumSize(hideTimerDimension);
hideTimerButton.setMaximumSize(hideTimerDimension);
hideTimerButton.setPreferredSize(hideTimerDimension);
hideTimerButton.setVisible(true);
//show timer button, visible when timer is not shown.
showTimerButton = new JButton("Show Timer");
showTimerButton.setBackground(Color.lightGray);
Dimension showTimerDimension = new Dimension(125, 25);
showTimerButton.setSize(showTimerDimension);
showTimerButton.setMinimumSize(showTimerDimension);
showTimerButton.setMaximumSize(showTimerDimension);
showTimerButton.setPreferredSize(showTimerDimension);
showTimerButton.setVisible(false);
//creates functionality for the show and hide timer buttons
hideTimerButton.addActionListener(this);
showTimerButton.addActionListener(this);
panel0.add(timer.getTimeLabel());
panel0.add(hideTimerButton);
panel0.add(showTimerButton);
rightPanel.add(panel0);
//Second panel in the grid.
JPanel panel1 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel1.setBackground(Color.white);
//Splits this panel into a grid
JPanel grid = new JPanel(new GridLayout(2,1));
//A Panel to hold the language drop down menu
JPanel languagePanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
languagePanel.setBackground(Color.white);
//Creates a combo box of languages (drop down menu)
String[] languages = {"English", "Spanish", "French", "Portuguese" };
languageBox = new JComboBox<String>(languages);
languageBox.setBackground(Color.white);
languageBox.addActionListener(this);
languagePanel.add(languageBox);
//Text under the combo box
JPanel textPanel = new JPanel();
JLabel text = new JLabel("Do you want to end your exam now?");
Font font = new Font("Dialog",Font.PLAIN,17);
text.setFont(font);
textPanel.setBackground(Color.white);
textPanel.add(text);
grid.add(languagePanel);
grid.add(textPanel);
//Stop sign picture
File stopSign = new File("resources/stop_sign.png");
ImageIcon stopSignIcon = null;
try {
stopSignIcon = new ImageIcon(ImageIO.read(stopSign));
}
catch (IOException e) {
System.out.println("Caught exception:" + e);
}
JLabel stopLabel = new JLabel();
stopLabel.setIcon(stopSignIcon);
stopLabel.setBackground(Color.white);
stopLabel.setBorder(null);
panel1.add(grid);
panel1.add(stopLabel);
rightPanel.add(panel1);
//third panel in the grid
JPanel panel2 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel2.setBackground(Color.white);
//splits the panel into a grid
JPanel textArea2 = new JPanel(new GridLayout(2,1));
textArea2.setBackground(Color.white);
JPanel warningText1 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
warningText1.setBackground(Color.white);
JLabel warningText1Point = new JLabel("<html><li>You left the following questions unanswered. If you end your exam now,<b> you lose the chance to answer these questions.</b></html>");
warningText1Point.setFont(textFont);
warningText1.add(warningText1Point);
JPanel breakPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
breakPanel.setBackground(Color.white);
JLabel space = new JLabel("<html><t> </t></html>");
breakPanel.add(space);
//adds FAKE question buttons to the panel
JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
buttonPanel.setBackground(Color.white);
JButton one = new JButton("1");
JButton two = new JButton("5");
JButton three = new JButton("12");
one.setBackground(Color.lightGray);
two.setBackground(Color.lightGray);
three.setBackground(Color.lightGray);
buttonPanel.add(one);
buttonPanel.add(two);
buttonPanel.add(three);
breakPanel.add(buttonPanel);
textArea2.add(warningText1);
textArea2.add(breakPanel);
panel2.add(textArea2);
rightPanel.add(panel2);
//fourth panel in the grid
JPanel panel3 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel3.setBackground(Color.white);
JPanel textArea3 = new JPanel(new GridLayout(2,1));
textArea3.setBackground(Color.white);
JPanel warningText3 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
warningText3.setBackground(Color.white);
JLabel warningText3Point = new JLabel("<html><li>You marked the following questions for later review. If you end your exam now, <b>you lose the chance to review these marked questions.</b></html>");
textArea3.setBackground(Color.white);
warningText3Point.setFont(textFont);
JPanel breakPanel3 = new JPanel(new FlowLayout(FlowLayout.LEFT));
breakPanel3.setBackground(Color.white);
JLabel space3 = new JLabel("<html><t> </t></html>");
breakPanel3.add(space3);
JPanel buttonPanel3 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
buttonPanel3.setBackground(Color.white);
JButton four = new JButton("4");
JButton five = new JButton("9");
JButton six = new JButton("20");
four.setBackground(Color.lightGray);
five.setBackground(Color.lightGray);
six.setBackground(Color.lightGray);
buttonPanel3.add(four);
buttonPanel3.add(five);
buttonPanel3.add(six);
breakPanel3.add(buttonPanel3);
textArea3.add(warningText3Point);
textArea3.add(warningText3);
textArea3.add(breakPanel3);
panel3.add(textArea3);
rightPanel.add(panel3);
//fifth panel in the grid
JPanel panel4 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel4.setBackground(Color.white);
JPanel grid4 = new JPanel(new GridLayout(2,1));
grid4.setBackground(Color.white);
JPanel border4 = new JPanel(new GridLayout(1,2));
border4.setBackground(Color.white);
JPanel spacer4 = new JPanel();
spacer4.setBackground(Color.white);
JPanel button4 = new JPanel();
button4.setBackground(Color.white);
returnToQuizButton = new JButton("No. Return to the Quiz" );
returnToQuizButton.setBackground(Color.lightGray);
returnToQuizButton.addActionListener(this);
button4.add(returnToQuizButton,BorderLayout.SOUTH);
JPanel textPanel4 = new JPanel(new FlowLayout(FlowLayout.LEFT));
textPanel4.setBackground(Color.white);
JLabel label4 = new JLabel("<html><li>You still have time remaining.</b></html>");
label4.setFont(textFont);
textPanel4.add(label4);
border4.add(spacer4);
border4.add(button4);
grid4.add(textPanel4);
grid4.add(border4);
panel4.add(grid4);
rightPanel.add(panel4);
//sixth panel in the grid
JPanel panel5 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel5.setBackground(Color.white);
JPanel textPanel5 = new JPanel(new FlowLayout(FlowLayout.LEFT));
textPanel5.setBackground(Color.white);
JLabel text5 = new JLabel("<html><li>If you end your exam now,<b> you cannot return to the exam.</b></html>");
text5.setFont(textFont);
textPanel5.add(text5);
panel5.add(textPanel5);
rightPanel.add(panel5);
//seventh panel in the grid
JPanel panel6 = new JPanel(new FlowLayout(FlowLayout.LEFT));
panel6.setBackground(Color.white);
JPanel textPanel6 = new JPanel(new FlowLayout(FlowLayout.LEFT));
textPanel6.setBackground(Color.white);
JLabel text6 = new JLabel("If you are ready to end the multiple-choice exam now, type the words 'I understand' in the box below.");
text6.setFont(textFont);
textPanel6.add(text6);
panel6.add(textPanel6);
rightPanel.add(panel6);
//eight panel in the grid
JPanel panel7 = new JPanel(new FlowLayout(FlowLayout.CENTER));
panel7.setBackground(Color.white);
textEnter = new JTextField("Type 'I understand' here.");
textEnter.setFont(textFont);
textEnter.setColumns(13);
//clears box on click of mouse
textEnter.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e){
textEnter.setText("");
}
});
textEnter.addActionListener(this);
JPanel textHolder = new JPanel();
textHolder.setBackground(Color.white);
textHolder.add(textEnter,BorderLayout.CENTER);
panel7.add(textHolder);
rightPanel.add(panel7);
//ninth panel in the grid
JPanel panel8 = new JPanel(new FlowLayout(FlowLayout.CENTER));
panel8.setBackground(Color.white);
endQuizButton = new JButton("Yes. End the Quiz Now");
endQuizButton.setBackground(Color.lightGray);
endQuizButton.addActionListener(this);
endQuizButton.setEnabled(false);
JPanel button8 = new JPanel();
button8.setBackground(Color.white);
button8.add(endQuizButton, BorderLayout.CENTER);
panel8.add(button8);
rightPanel.add(panel8);
getContentPane().setBackground(Color.white);
leftPanel.setVisible(true);
rightPanel.setVisible(true);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
#Override
public void actionPerformed(ActionEvent e) {
String text = textEnter.getText();
if(text.equals("I understand")){
endQuizButton.setEnabled(true);
}
if(e.getSource() == hideTimerButton){
hideTimerButton.setVisible(false);
timer.getTimeLabel().setVisible(false);
showTimerButton.setVisible(true);
}else if(e.getSource() == showTimerButton){
showTimerButton.setVisible(false);
hideTimerButton.setVisible(true);
timer.getTimeLabel().setVisible(true);
}else if(e.getSource() == returnToQuizButton){
TakeQuiz quizScreen = new TakeQuiz();
this.setVisible(false);
quizScreen.setVisible(true);
}else if(e.getSource() == endQuizButton){
int response = JOptionPane.showConfirmDialog(null, "Are you sure you want to submit your quiz for grading?","Select an Option", JOptionPane.YES_NO_OPTION);
if(response == JOptionPane.YES_OPTION){
JOptionPane.showMessageDialog(null, "Your grade on this quiz is: 85");
System.exit(0);
}
}
}
}
QUIZ TIMER
package edu.kings.pexam.student;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.Timer;
public class QuizTimer {
private static double time = 1.44*Math.pow(10,7);
private SimpleDateFormat setTime = new SimpleDateFormat("hh:mm:ss");
private JLabel timeLabel;
private Timer countDown;
public QuizTimer(){
countDown = new Timer(1000, new ActionListener(){
public void actionPerformed(ActionEvent e) {
if (time >= 0) {
timeLabel.setText(setTime.format(time));
time = time-1000;
}else{
JOptionPane.showMessageDialog(null, "Your quiz has been automatically submitted for grading.", "Out of Time", JOptionPane.OK_OPTION);
System.exit(0);
}
}
});
timeLabel = new JLabel();
timeLabel.setFont( new Font("Dialog", Font.PLAIN + Font.BOLD,24));
timeLabel.setVisible(true);
}
public JLabel getTimeLabel(){
return timeLabel;
}
public void start(){
countDown.start();
}
}
The first problem (11:00:00 to 7:00:00) probably has to do with your timezone.
The second one may (from the top of my head) have to do with time field being static.
In any way, I'd be curious why it is static. Seems that this logic would break if you have two timers.
(P.S. Please vote.)
I am making a simple layout for a calculator, actually i am new to java and learning the basics. My problem is that when i run this code, only a JFrame opens and the other panels n its buttons are not shown. PLz help , where my i going wrong.
import java.awt.*;
import javax.swing.*;
public class Layouts extends JFrame{
public Layouts(){
super("Calculator");
setLookAndFeel();
setSize(350,350);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
BorderLayout border = new BorderLayout();
setLayout(border);
GridLayout numbers = new GridLayout(2,2);
row2.setLayout(numbers);
row2.add(one);
row2.add(two);
row2.add(three);
row2.add(four);
GridLayout operators = new GridLayout(2,2);
row3.setLayout(operators);
row3.add(plus);
row3.add(subtract);
row3.add(multiply);
row3.add(equals);
setVisible(true);
}
private void setLookAndFeel()
{
try
{
IManager.setLookAndFeel("com.sun.java.lang.plaf.nimbus.NimbusLookAndFeel");
}
catch(Exception exc)
{
}
}
//row 1
JPanel row1 = new JPanel();
JTextField text = new JTextField(20);
//row 2
JPanel row2 = new JPanel();
JButton one = new JButton("1");
JButton two = new JButton("2");
JButton three = new JButton("3");
JButton four = new JButton("4");
//row3
JPanel row3 = new JPanel();
JButton plus = new JButton("+");
JButton subtract = new JButton("-");
JButton multiply = new JButton("*");
JButton equals = new JButton("=");
public static void main(String[] args)
{
Layouts l1 = new Layouts();
}
}
Remember to add all of the components (i.e row2, row3 etc..)
Example:
add(row2,BorderLayout.CENTER)
add(row3,BorderLayout.SOUTH)
BorderLayout border = new BorderLayout();
setLayout(border);
But you aren't adding anything to border ! Add the numbers and operators.
You need to add the JPanels and JButtons to JFrame. The JFrame in this case is your Layouts class. So do something like :
row1.add(text);
this.add(row1);
row2.add(one);
row2.add(two);
row2.add(three);
row2.add(four);
this.add(row2);
...
check this tutorial is is a very useful one JButton, JPanel & JFrame examples