I want to have multiple components on a JFrame. I don't want any UI formatting. I just want multiple components to be drawn. My full code is to large to post so here is my JFrame set up.
JPanel jPanel = new JPanel();
jPanel.setLayout(new FlowLayout());
jPanel.add(board.getPieceAt(0,0));
jPanel.add(board);
frame.add(jPanel);
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
board and board.getPieceAt(0,0); are JComponents
No combination of frame.add() or adding panels seems to get both to render. It's always the last one added that gets drawn.
This example renders two components. I updated my code above to mimic this example as much as possible and it still results in an empty frame. To me it seems that I'm doing exactly what the example is doing yet I get a different result.
import java.awt.FlowLayout;
import java.awt.BorderLayout;
import javax.swing.*;
public class TestFrameExample {
public static void main(){
JFrame frame = new JFrame("JFrame Example");
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout());
JLabel label = new JLabel("This is a label!");
JButton button = new JButton();
button.setText("Press me");
panel.add(label);
panel.add(button);
frame.add(panel);
frame.setSize(300, 300);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
How do I get both components to render on the JFrame?
Related
I am trying to write a Title for the main menu of my program, by using a JLabel, but it doesn't seem to appear on my screen.
import javax.swing.*;
public class GUI {
public GUI() {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
panel.setBorder(BorderFactory.createEmptyBorder(30,30,10,30));
panel.setLayout(new GridLayout());
frame.add(panel, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Title");
frame.pack();
frame.setSize(854,560);
frame.setVisible(true);
JLabel title = new JLabel();
title.setText("Title");
//title.setSize();
title.setVisible(true);
}
public static void main(String[] args) {
new GUI();
}
}
What am I doing wrong and how could I change the position of the Text if I manage to make it visible?
And I also want to add a button to go to the next page so if you could tell me how to do that too that would be great.
I would quickly and untested say that you are adding the label after you set the frame visible.
Do it before. Else you would have to revalidate and repaint the frame
As I can see in your code you are not adding title in panel. As a quick solution put panel.add(title); after title.setVisible(true); line in your code, it will display the label.
JFrame frame = new JFrame();
JPanel panel = new JPanel();
panel.setBorder(BorderFactory.createEmptyBorder(30,30,10,30));
panel.setLayout(new GridLayout());
frame.add(panel, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Title");
frame.pack();
frame.setSize(854,560);
frame.setVisible(true);
JLabel title = new JLabel();
title.setText("Title");
//title.setSize();
title.setVisible(true);
panel.add(title); //<---- this one line will diaplay label in GUI
I just got started learning JFrame and is trying to create a frame containing JLabels and JTextFields frame using grouplayout, but the contents inside my panel aren't appearing when I run the program.
All help is appreciated.
package practice;
import java.awt.*;
import javax.swing.*;
public class Boxc {
public static void main(String[] args){
JFrame frame = new JFrame("---------------------(-_-)---------------------");
JLabel headText = new JLabel("Teach Me");
//head text
headText.setVerticalAlignment(JLabel.TOP);
headText.setHorizontalAlignment(JLabel.CENTER);
headText.setFont(headText.getFont().deriveFont(20f));
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(700, 500);
frame.setResizable(false);
frame.setLocationRelativeTo(null); //Center start position
frame.add(headText);
//panel 1
JPanel panel1 = new JPanel();
GroupLayout layout = new GroupLayout(panel1);
panel1.setLayout(layout);
layout.setAutoCreateGaps(true);
layout.setAutoCreateContainerGaps(true);
JLabel uInput = new JLabel("When You Type:");
JTextField uText = new JTextField("Enter Here");
JLabel iReply = new JLabel("I Reply:");
JTextField iText = new JTextField("Enter Here");
GroupLayout.SequentialGroup hGroup = layout.createSequentialGroup();
hGroup.addGroup(layout.createParallelGroup().
addComponent(uInput).addComponent(iText));
hGroup.addGroup(layout.createParallelGroup().
addComponent(uText).addComponent(iText));
layout.setHorizontalGroup(hGroup);
frame.add(panel1);
}}
Java is weird.
It all has to do with the ordering of your JFrame methods. You must ALWAYS do frame.setVisible(true); at the end, preferably as the last line of code in whatever you're using to initiate the JFrame. In that case,
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(700, 500);
frame.setResizable(false);
frame.setLocationRelativeTo(null); //Center start position
frame.add(headText);
would be changed to
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(700, 500);
frame.setResizable(false);
frame.setLocationRelativeTo(null); //Center start position
frame.add(headText);
frame.setVisible(true);
Hope this helps.
EDIT: ignore the changing from/to. Put the frame.setVisible(true); after frame.add(panel1);.
I am working on a program for my school to use. It is like match.com, but for a public school. Yes there has been permission from the school to do this.
This is the first time I have ever used swing and I am having an issue with adding my JPanel to my JFrame so that I can see and use the button.
private void Framing()
{
JPanel Panel = new JPanel();
Panel.setLayout(new BorderLayout());
JFrame Frame = new JFrame("Warning");
Frame.setUndecorated(true);
JButton OK = new JButton("EXIT");
OK.addActionListener((ActionEvent event) -> {System.exit(0);});
OK.setBounds(100,100,100,100);
Panel.add(OK, BorderLayout.CENTER);
Frame.getContentPane().add(Panel, BorderLayout.CENTER);
Panel.setLocation((Frame.getWidth()-Panel.getWidth())/2,0);
Frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
Frame.setLocation(600, 300);
Frame.setResizable(false);
Frame.setLayout(null);
Frame.setVisible(true);
}
What is the fastest way to fix the issue with the panel not even showing up?
Any solutions are welcomed.
Since you are a new Swing programmer, I'll try to explain with below sample code. Here I have taken your code and done few changes. See my comments in the code.
With these changes, now the program works and shows a window with a big button. When user clicks the button program exits.
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
public class SwingTest
{
private void Framing() //Better method name would be "showFrame()"
{
JPanel Panel = new JPanel(); //Better variable name would be "panel"
Panel.setLayout(new BorderLayout());
JFrame Frame = new JFrame("Warning"); //Better variable name would be "frame"
Frame.setUndecorated(true);
JButton OK = new JButton("EXIT"); //Better variable name would be "exitButton"
OK.addActionListener((ActionEvent event) -> {System.exit(0);});
//Not necessary. Layout manager will handle this.
//OK.setBounds(100,100,100,100);
Panel.add(OK, BorderLayout.CENTER);
Frame.getContentPane().add(Panel, BorderLayout.CENTER);
//Not necessary. Layout manager will handle this.
//Panel.setLocation((Frame.getWidth()-Panel.getWidth())/2,0);
Frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
Frame.setLocation(600, 300);
Frame.setResizable(false);
//This is the main problem. You should avoid this.
//Frame.setLayout(null);
Frame.setVisible(true);
}
public static void main(String[] args)
{
new SwingTest().Framing();
}
}
I used the internet as a resource to help me make a JButton but for some reason I cannot get it to a normal size. I have changed the dimensions and messes around a lot but it is not working.
Here is my code:
import javax.swing.*;
import java.awt.*;
public class ScreenSaver {
public static void main(String[] args) {
JFrame frame = new JFrame();
JButton button = new JButton();
JPanel panel = new JPanel();
button.setSize(100, 100);
panel.add(button);
frame = new JFrame ("Screen Saver");
frame.setSize(Toolkit.getDefaultToolkit().getScreenSize());
frame.setUndecorated(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.setBackground(new Color(1.0f,1.0f,1.0f,0.1f));
frame.setResizable(true);
frame.setVisible(true);
}
}
Try to use
frame.setLayout(null);
then you can
button.setLocation(x,y);
It will help you to place Java components in the locations you want.
Otherwise default Java Layout is applied to your Frame and then you cannot fully customise design!
Remember then you need to customise all components you are adding to JFrame. (setSize, setLocation to JPanel as well.)
how can i modify the size of the panel in the JFrame
am doing a calculator, the first panel will hold the JTextField which i suppose to be small
the second panel will hold the JButtons which suppose to be bigger
JFrame frame = new JFrame(new GridLayout(2, 1));
JPanel panel1 = new JPanel();
JPanel panel2 = new JPabel();
frame.add(panel1);
frame.add(panel2);
i've been trying to make panel1 smaller than panel2 yet nothing worked!
GridLayout would not be an appropriate choice in this scenario since it ignores the preferred sizes of the components inside the container and displays them all at an equal size instead.
I'd suggest using a BorderLayout. You can find a demonstration and description of that layout manager as well as a few others in Oracle's tutorial, A Visual Guide to Layout Managers.
Here's another example using BorderLayout which might be more relevant to your problem.
import java.awt.*;
import javax.swing.*;
public class Test {
public static void main(String []args){
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame frame = new JFrame();
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
panel1.setBorder(BorderFactory.createTitledBorder("Panel 1"));
panel2.setBorder(BorderFactory.createTitledBorder("Panel 2"));
frame.add(panel1, BorderLayout.NORTH);
frame.add(panel2, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(new Dimension(200, 200));
frame.setVisible(true);
}
});
}
}
Edit: The JFrame's content pane uses a BorderLayout by default, hence the absence of a call to setLayout. Source