I am having trouble implementing JLabel with JFrame. The program needs to show either "Hello" or "World" in the center of the screen when the button "study" is pressed. Also with this being a flashcard program, when study is pressed a word is placed on the middle of the screen and the program is suppose to read from the text field for the user input and print whether it is right or wrong. The problem is that the program is reading the text field after study is pressed so it is printing false before the user can input a answer.
Can someone briefly explain why this is not working and what I can do to fix this issue?
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JButton;
public class NoteCardGUI implements ActionListener {
public static JFrame frame;
public static JPanel panel;
public static JLabel label;
private NoteCard ex;
private JButton study;
public static Box box1 = new Box(), box2 = new Box(), box3 = new Box();
public NoteCardGUI() {
ex = new NoteCard("Hello", "World");
frame = new JFrame("Flash Card");
panel = new JPanel();
study = new JButton("Study");
study.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String resp = NoteCard.getResponse(ex);
String chal = NoteCard.getChallenge(ex);
String a = text.getText();
label = new JLabel(chal, label.CENTER);
label.setAlignmentX(0);
label.setAlignmentY(0);
frame.add(label, BorderLayout.SOUTH);
frame.revalidate();
if(resp.compareTo(a) == 0)
{
label = new JLabel("Correct!");
}
label = new JLabel("Incorrect");
}
});
panel.add(study);
frame.add(panel);
frame.setSize(500, 500);
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
new NoteCardGUI();
}
#Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
}
}
You are adding the label to your frame, but you already have added a JPanel on top of the frame. The solution is to add the label to the panel instead of the frame.
So change: frame.add(label); to panel.add(label);
By default, a JFrame (or rather, its content pane) has BorderLayout. This means that if you add components to it without specifying a constraint, they will be added at the CENTER. But you can't add more than one element at any of the BorderLayout's regions.
So in order for this to work, you need to add the label somewhere else other than the center, or have the panel added with some other, explicit region.
So if you change the add, for example, to:
frame.add(label, BorderLayout.NORTH);
It will work - but you must not forget to also add:
frame.revalidate();
Whenever you add components to your GUI, you should call this when you've added them all, in order for it to rebuild the hierarchy of components as needed.
Another option would be to change the layout manager of the Frame, or to add to the panel.
Related
I am currently working on my school project to practice vocabulary, I have a method in my GUI that creates new vocabulary and the name of the list, I wanted to create a button that adds more Panels with input fields just this prototype image.
My idea is that when the user clicks
AddMoreButton it will add one JPanel just like P Panel, then the user can write vocabulary to send it to my database, is it possible to create something that?, I tried looping the P panel but it did not not change, any help would be appreciated.
private JPanel SetUpCreate() {
JPanel createPanel = new JPanel();
nameListInput = new JTextField(INPUT_FIELD_WIDTH);
termInput = new JTextField(INPUT_FIELD_WIDTH);
defintionInput = new JTextField(INPUT_FIELD_WIDTH);
p = new JPanel();
doneCreate = new JButton("Done");
doneCreate.addActionListener(new DoneCreateButtonAction());
addMoreButton = new JButton("Add");
addMoreButton.addActionListener(new AddMorePanelsListener());
p.setBorder(new BevelBorder(BevelBorder.RAISED));
p.add(termInput);
p.add(defintionInput);
JScrollPane pane = new JScrollPane(p);
createPanel.add(nameListInput);
createPanel.add(p);
createPanel.add(pane);
createPanel.add(doneCreate);
return createPanel;
}
private class DoneCreateButtonAction implements ActionListener {
public DoneCreateButtonAction() {
super();
}
public void actionPerformed(ActionEvent e) {
String namelist = nameListInput.getText();
String termglosa = termInput.getText();
String defintionglosa = defintionInput.getText();
try {
if (model.createWordList(namelist) && (model.createGlosa(termglosa, defintionglosa))) {
cl.show(cardPanel, "home");
}
} catch (IOException e1) {
JOptionPane.showMessageDialog(frame, "skapelsen av listan fungerar ej.");
}
}
}
private class AddMoreButtonAction implements ActionListener {
public AddMoreButtonAction() {
super();
}
public void actionPerformed(ActionEvent e) {
}
}
What I understand from your question is that you want to add another panel every time the user clicks the Add button and the panel to add contains fields for entering a word and its definition.
I see JScrollPane appears in the code you posted in your question. I think this is the correct implementation. In the below code, every time the user clicks the Add button I create a panel that contains the fields for a single word definition. This newly created panel is added to an existing panel that uses GridLayout with one column. Hence every time a new word definition panel is added, it is placed directly below the last word panel that was added and this GridLayout panel is placed inside a JScrollPane. Hence every time a word definition panel is added, the GridLayout panel height increases and the JScrollPane adjusts accordingly.
import java.awt.BorderLayout;
import java.awt.EventQueue;
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.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
public class MorPanel implements ActionListener, Runnable {
private static final String ADD = "Add";
private JFrame frame;
private JPanel vocabularyPanel;
#Override
public void run() {
showGui();
}
#Override
public void actionPerformed(ActionEvent actionEvent) {
String actionCommand = actionEvent.getActionCommand();
switch (actionCommand) {
case ADD:
vocabularyPanel.add(createWordPanel());
vocabularyPanel.revalidate();
vocabularyPanel.repaint();
break;
default:
JOptionPane.showMessageDialog(frame,
actionCommand,
"Unhandled",
JOptionPane.ERROR_MESSAGE);
}
}
public JButton createButton(String text) {
JButton button = new JButton(text);
button.addActionListener(this);
return button;
}
public JPanel createButtonsPanel() {
JPanel buttonsPanel = new JPanel();
buttonsPanel.add(createButton(ADD));
return buttonsPanel;
}
private JScrollPane createMainPanel() {
vocabularyPanel = new JPanel(new GridLayout(0, 1));
vocabularyPanel.add(createWordPanel());
JScrollPane scrollPane = new JScrollPane(vocabularyPanel);
return scrollPane;
}
private JPanel createWordPanel() {
JPanel wordPanel = new JPanel();
JLabel wordLabel = new JLabel("Enter Term");
JTextField wordTextField = new JTextField(10);
JLabel definitionLabel = new JLabel("Enter Term Definition");
JTextField definitionTextField = new JTextField(10);
wordPanel.add(wordLabel);
wordPanel.add(wordTextField);
wordPanel.add(definitionLabel);
wordPanel.add(definitionTextField);
return wordPanel;
}
private void showGui() {
frame = new JFrame("Vocabulary");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(createMainPanel(), BorderLayout.CENTER);
frame.add(createButtonsPanel(), BorderLayout.PAGE_END);
frame.setSize(480, 200);
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new MorPanel());
}
}
As your code is not an Minimal Reproducible Example, I cannot provide further assistance than this:
Red part: Your main JPanel with BoxLayout
Green part: another JPanel with your JTextField in it.
Purple part: JScrollPane
Blue parts: custom JPanels with 2 panes in them, one on top for the number, one on the bottom for both JTextFields and icon, so I would say GridBagLayout or BoxLayout + FlowLayout
Orange part: JPanel with GridBagLayout or FlowLayout
Each time you clic on the + icon, you just create a new instance of the custom blue JPanel and that's it.
I'm trying to get my labels to be in the center of the window when I press the corresponding button, but it instead just sits on top of the button instead of sitting in the middle and i'm not sure why
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class navigator extends JFrame
{
Container con;
public navigator(){
super("JFrame");
JFrame newFrame = new JFrame("Navigator");
newFrame.setSize(400, 400);
newFrame.setVisible(true);
newFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
con = getContentPane();
BorderLayout newLayout = new BorderLayout();
con.setLayout(newLayout);
JButton newButton = new JButton("Up");
newFrame.add(newButton, BorderLayout.NORTH);
JButton newButton2 = new JButton("Left");
newFrame.add(newButton2, BorderLayout.WEST);
JButton newButton3 = new JButton("Down");
newFrame.add(newButton3, BorderLayout.SOUTH);
JButton newButton4 = new JButton("Right");
newFrame.add(newButton4, BorderLayout.EAST);
JLabel newLabel = new JLabel("Going up!");
newFrame.add(newLabel, BorderLayout.CENTER);
newLabel.setVisible(false);
newButton.add(newLabel);
JLabel newLabel2 = new JLabel("Going left!");
newFrame.add(newLabel2, BorderLayout.CENTER);
newLabel2.setVisible(false);
newButton2.add(newLabel2);
JLabel newLabel3 = new JLabel("Going down!");
newFrame.add(newLabel3, BorderLayout.CENTER);
newLabel3.setVisible(false);
newButton3.add(newLabel3);
JLabel newLabel4 = new JLabel("Going right!");
newFrame.add(newLabel4, BorderLayout.CENTER);
newLabel4.setVisible(false);
newButton4.add(newLabel4);
newButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
newLabel.setVisible(true);
newLabel2.setVisible(false);
newLabel3.setVisible(false);
newLabel4.setVisible(false);
}
});
newButton2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
newLabel2.setVisible(true);
newLabel.setVisible(false);
newLabel3.setVisible(false);
newLabel4.setVisible(false);
}
});
newButton3.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
newLabel3.setVisible(true);
newLabel2.setVisible(false);
newLabel.setVisible(false);
newLabel4.setVisible(false);
}
});
newButton4.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
newLabel4.setVisible(true);
newLabel2.setVisible(false);
newLabel3.setVisible(false);
newLabel.setVisible(false);
}
});
}
public static void main(String[] args){
navigator myNavigator = new navigator();
}
}
JLabel newLabel = new JLabel("Going up!");
newFrame.add(newLabel, BorderLayout.CENTER);
newLabel.setVisible(false);
newButton.add(newLabel); // ???
A component can only have a single parent. So you can't add the label to the frame and the button. I'm not even sure why you would be attempting to add the label to the button.
In any case you can't add four labels to the center of the frame. The BorderLayout only allows one component in each area, so only the last component added will ever be visible. The BorderLayout will only set the size of the last button added. All the other buttons will have a size of (0, 0) so there is nothing to paint.
So just add a single label and then change the text using the setText(...) method in your ActionListener.
However, once you fix this you will still have a problem. By default a label is painted at the left of the space available to the label.
If you want the text displayed in the center then you need to use:
label.setHorizontalAlignment(JLabel.CENTER);
Also, all components should be added to the frame before making the frame visible.
Finally, class names should start with an upper case character. Look at the class names of the JDK API and follow the conventions used their.
When using a BorderLayout, you can only put one control in each section. So you can only put one button in CENTER, for instance.
If you want to put more things in one area, then you need to create a new JPanel, put it in CENTER, and then place the buttons on the newly created JPanel. (Of course following the same layout rules for it). You can recursively add as many jpanels as you like.
I'm trying to do a little program that use some buttons and text field.
I was able to create window with JPanel but don't have idea how to add button and text field
The code I'm using is:
public UI() {
sprites = new HashMap();
// spriteCache = stage.getSpriteCache();
JFrame okno = new JFrame ("VoLTE Script");
setBounds(0,0,SZEROKOSC,WYSOKOSC);
JPanel panel = (JPanel)okno.getContentPane();
panel.setLayout (null);
panel.add(this);
okno.setBounds(0,0,800,600);
okno.setVisible(true);
JTextField pole = new JTextField(10);
JButton przycisk = new JButton("teasda");
przycisk.setPreferredSize(new Dimension(300, 350));
przycisk.setLayout(new BorderLayout());
panel.add(przycisk);
przycisk.setVisible(true);
pole.setBounds (300,300,200,200);
pole.setLayout(null);
pole.setVisible(true);
panel.add(pole);
okno.addWindowListener(new WindowAdapter(){
public void windowClosing (WindowEvent e){
System.exit(0);
}
});
okno.setResizable(false);
createBufferStrategy(2);
strategia=getBufferStrategy();
requestFocus();
// addKeyListener(this);
// addMouseListener(this);
}
You need to use the layout properly, when using border layout you need to tell it which border to use (, BorderLayout.NORTH or something), check out the tutorials at oracles page.
P.S. Think of how your naming your fields etc. Naming something "przycisk" just gives me a reason not to read the code further.
Thank You for help and sorry for Polish names(fixed already).
I was able to add Text Area with scroll.
Looks like problem was in panel.add(this); putted before button and text field.
From my understanding if panel.add(this) is set before panel.add(pole); then panel.add(this) is set in front and pole is added but not seen.
Below my actual working code:
...
public UI() {
sprites = new HashMap();
// spriteCache = stage.getSpriteCache();
JFrame okno = new JFrame ("VoLTE Script");
setBounds(0,0,WIDTH,HEIGHT);
JPanel panel = (JPanel)okno.getContentPane();
panel.setLayout (null);
okno.setBounds(0,0,800,600);
okno.setVisible(true);
JTextArea pole = new JTextArea();
pole.setLayout(null);
pole.setLineWrap(true);
//pole.setBackground(Color.BLACK);
pole.setEditable(false);
JScrollPane scroll = new JScrollPane(pole);
scroll.setBounds(25,250,500,300);
scroll.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
panel.add(scroll);
panel.add(this);
okno.addWindowListener(new WindowAdapter(){
public void windowClosing (WindowEvent e){
System.exit(0);
}
});
okno.setResizable(false);
createBufferStrategy(2);
strategia=getBufferStrategy();
requestFocus();
// addKeyListener(this);
addMouseListener(this);
}
...
This code is from this site: Example of Java GUI
//Imports are listed in full to show what's being used
//could just import javax.swing.* and java.awt.* etc..
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JComboBox;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JList;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class GuiApp1 {
//Note: Typically the main method will be in a
//separate class. As this is a simple one class
//example it's all in the one class.
public static void main(String[] args) {
new GuiApp1();
}
public GuiApp1()
{
JFrame guiFrame = new JFrame();
//make sure the program exits when the frame closes
guiFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
guiFrame.setTitle("Example GUI");
guiFrame.setSize(300,250);
//This will center the JFrame in the middle of the screen
guiFrame.setLocationRelativeTo(null);
//Options for the JComboBox
String[] fruitOptions = {"Apple", "Apricot", "Banana"
,"Cherry", "Date", "Kiwi", "Orange", "Pear", "Strawberry"};
//Options for the JList
String[] vegOptions = {"Asparagus", "Beans", "Broccoli", "Cabbage"
, "Carrot", "Celery", "Cucumber", "Leek", "Mushroom"
, "Pepper", "Radish", "Shallot", "Spinach", "Swede"
, "Turnip"};
//The first JPanel contains a JLabel and JCombobox
final JPanel comboPanel = new JPanel();
JLabel comboLbl = new JLabel("Fruits:");
JComboBox fruits = new JComboBox(fruitOptions);
comboPanel.add(comboLbl);
comboPanel.add(fruits);
//Create the second JPanel. Add a JLabel and JList and
//make use the JPanel is not visible.
final JPanel listPanel = new JPanel();
listPanel.setVisible(false);
JLabel listLbl = new JLabel("Vegetables:");
JList vegs = new JList(vegOptions);
vegs.setLayoutOrientation(JList.HORIZONTAL_WRAP);
listPanel.add(listLbl);
listPanel.add(vegs);
JButton vegFruitBut = new JButton( "Fruit or Veg");
//The ActionListener class is used to handle the
//event that happens when the user clicks the button.
//As there is not a lot that needs to happen we can
//define an anonymous inner class to make the code simpler.
vegFruitBut.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent event)
{
//When the fruit of veg button is pressed
//the setVisible value of the listPanel and
//comboPanel is switched from true to
//value or vice versa.
listPanel.setVisible(!listPanel.isVisible());
comboPanel.setVisible(!comboPanel.isVisible());
}
});
//The JFrame uses the BorderLayout layout manager.
//Put the two JPanels and JButton in different areas.
guiFrame.add(comboPanel, BorderLayout.NORTH);
guiFrame.add(listPanel, BorderLayout.CENTER);
guiFrame.add(vegFruitBut,BorderLayout.SOUTH);
//make sure the JFrame is visible
guiFrame.setVisible(true);
}
}
For the future i will recommend you to use the extends JFrame so you can only write a gui like this without initialize a JFrame:
public class CalculatorGUI extends JFrame {
public CalculatorGUI() {
setTitle("Calculator");
setBounds(300, 300, 220, 200);
}}
I suggest you check out a couple of tutorials about how to create a Java Gui or sth.
I've looked around quite a lot on google and followed several examples however I can't seem to get my JScrollPane working on a textarea in a JPanel.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.event.*;
class main
{
public static void main(String Args[])
{
frame f1 = new frame();
}
}
class frame extends JFrame
{
JButton B = new JButton("B");
JButton button = new JButton("A");
JTextArea E = new JTextArea("some lines", 10, 20);
JScrollPane scrollBar = new JScrollPane(E);
JPanel grid = new JPanel ();
frame()
{
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(500,800);
setTitle("Mobile Phone App");
setLocationRelativeTo(null);
E.setLineWrap(true);
E.setEditable(false);
grid.add(button);
button.addActionListener(new action());
grid.add(B);
B.addActionListener(new action());
//grid.add(E);
grid.getContentPane().add(scrollBar);
add(grid);
setVisible(true);
}
class action implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String V = E.getText();
if(e.getSource() == button)
{
E.setText(V + "A is pressed");
}
if(e.getSource() == B)
{
E.setText(V + "B is pressed");
}
}
}
}
Would be great if someone can see where I am going wrong. I added JscrollPane in which I added the text area "e" in it.
E.setColumns(10);
E.setRows(5);
E.setPreferredSize(new Dimension(10,5)); // delete this
Don't hardcode a preferred size. The preferred size is overriding your attempt to set the rows/columns. So get rid of that line.
Note, you can also specify the row/columns when you create the text area:
JTextArea textArea = new JTextArea(5, 10);
to provide a hint to the intial size of the text area. Now the text area can change in size as text is added or removed and the scrollbar will appear when needed.
Also follow standard java naming conventions. Variable names should NOT start with an upper case character.
Right I got it!
Basically I had to add it in differently...the way I was approaching it was wrong!
grid.add(scrollBar, BorderLayout.CENTER);
Can someone please help me how to set the width of a JTextField at runtime? I want my text field to be resized on runtime. It will ask the user for the length, then the input will change the width of the text field.
if(selectedComponent instanceof javax.swing.JTextField){
javax.swing.JTextField txtField = (javax.swing.JTextField) selectedComponent;
//txtField.setColumns(numInput); //tried this but it doesn't work
//txtField.setPreferredSize(new Dimension(numInput, txtField.getHeight())); //also this
//txtField.setBounds(txtField.getX(), txtField.getY(), numInput, txtField.getHeight());
//and this
txtField.revalidate();
}
I am using null layout for this, since I'm on edit mode.
You simply need to use jTextFieldObject.setColumns(int columnSize). This will let you increase it's size at runtime. The reason why you couldn't do it at your end is the null Layout. That is one of the main reasons why the use of null Layout/Absolute Positioning is discouraged. Here is a small example for trying your hands on :
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JTextFieldExample
{
private JFrame frame;
private JPanel contentPane;
private JTextField tfield;
private JButton button;
private int size = 10;
private ActionListener action = new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
String input = JOptionPane.showInputDialog(
frame, "Please Enter Columns : "
, String.valueOf(++size));
tfield.setColumns(Integer.parseInt(input));
contentPane.revalidate();
contentPane.repaint();
}
};
private void createAndDisplayGUI()
{
frame = new JFrame("JTextField Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
contentPane = new JPanel();
contentPane.setLayout(new FlowLayout(FlowLayout.LEFT, 5, 5));
tfield = new JTextField();
tfield.setColumns(size);
JButton button = new JButton("INC Size");
button.addActionListener(action);
contentPane.add(tfield);
contentPane.add(button);
frame.getContentPane().add(contentPane);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new JTextFieldExample().createAndDisplayGUI();
}
});
}
}
For absolute positioning you need to call setSize() on the JTextField in order to attain the result, though you should always keep in mind the reason why this approach is discouraged, as given in the Java Doc's first paragraph:
Although it is possible to do without a layout manager, you should use a layout manager if at all possible. A layout manager makes it easier to adjust to look-and-feel-dependent component appearances, to different font sizes, to a container's changing size, and to different locales. Layout managers also can be reused easily by other containers, as well as other programs.
I got the text field to resize just by using setBounds. Check out the following example:
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Resize extends JFrame{
public JTextField jtf = new JTextField();
public Resize(){
//frame settings
setTitle("Resizable JTextField");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(null);
setSize(new Dimension(600,400));
setResizable(false);
//init and add text field to the frame
add(jtf);
jtf.setBounds(20,50,200,200);
//button to change text field size
JButton b = new JButton("Moar.");
add(b);
b.setBounds(20,20,b.getPreferredSize().width,b.getPreferredSize().height);
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
jtf.setBounds(20,50,jtf.getSize().width+10,jtf.getSize().height); //THIS IS WHERE THE RESIZING HAPPENS
}
});
setVisible(true);
}
public static void main(String[] args){
Resize inst = new Resize();
}
}
"Fun" little run-it-yourself solution:
public static void main(String[] args) {
JFrame frame = new JFrame();
JTextField jTextField = new JTextField("Alice");
JPanel panel = new JPanel();
JButton grow = new JButton("DRINK ME");
JButton shrink = new JButton("EAT ME");
panel.add(jTextField);
panel.add(grow);
panel.add(shrink);
frame.add(panel);
frame.setVisible(true);
frame.pack();
grow.addActionListener(l -> resize(frame, jTextField, 2));
shrink.addActionListener(l -> resize(frame, jTextField, 0.5f));
}
private static void resize(JFrame frame, Component toResize, float factor) {
System.out.println(toResize.getPreferredSize());
toResize.setPreferredSize(new Dimension((int)(toResize.getPreferredSize().width * factor),
(int)(toResize.getPreferredSize().height * factor)));
toResize.setFont(toResize.getFont().deriveFont(toResize.getFont().getSize() * factor));
frame.pack();
}
Attention: Please note that the consumption of too much cake can kill you.