import java.awt.*;
import java.awt.event.*;
import java.lang.*;
public class Party {
public static void main(String[] args){
System.out.printf("Start\n");
Frame f = new Frame();
Label l = new Label("Party over here!");
Button b = new Button("You bet") ;
Button C = new Button("Shoot me");
Panel p = new Panel();
p.add(l);
System.out.printf("End\n");
}
}
Why don't I get the dialog? Something missing in the example?
public static void main(String[] args){
System.out.printf("Start\n");
Frame f = new Frame();
Label l = new Label("Party over here!");
Button b = new Button("You bet") ;
Button C = new Button("Shoot me");
Panel p = new Panel();
p.add(l);
f.add(p);
f.add(b);
f.add(c);
f.setVisible(true);//<-- make it visible...
System.out.println("End");
}
I think you need to read some more basics about the java GUI, good luck.
The book, in that example, comments, after, new Panel() line:
//more code here...
That means that the code is non necessarily functional.
By adding a line f.setVisible(true); you should see it.
Add to your code:
f.setVisible(true);
Well it seems you have made a frame, and a label and a button, and put something on a panel. But did you show the frame?
Use f.setVisible(true);
And if you want to use a frame I suggest you use JFrame.
But you specified you wanted a dialog to show up, and this is how you do so:
JOptionPane.showMessageDialog(frame, "Eggs are not supposed to be green.");
Look here for more info on dialogs:
http://docs.oracle.com/javase/tutorial/uiswing/components/dialog.html#overview
Related
I'm trying to add a .gif image to a JButton, but can't seem to get the image to load when i run the code. I've included a screenshot. Included is the frame that's created. I'd really appreciate any help that can be provided. Stack is telling me I can't enter images yet, so it created a link for it. I'm also going to enclose the actual code here:
package java21days;
import javax.swing.*;
import java.awt.*;
public class ButtonsIcons extends JFrame {
JButton load, save, subscribe, unsubscribe;
public ButtonsIcons() {
super("Icon Frame");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
//Icons
ImageIcon loadIcon = new ImageIcon("load.gif");
ImageIcon saveIcon = new ImageIcon("save.gif");
ImageIcon subscribeIcon = new ImageIcon("subscribe.gif");
ImageIcon unsubscribeIcon = new ImageIcon("unsubscribe.gif");
//Buttons
load = new JButton("Load", loadIcon);
save = new JButton("Save", saveIcon);
subscribe = new JButton("Subscribe", subscribeIcon);
unsubscribe = new JButton("Unsubscribe", unsubscribeIcon);
//Buttons To Panel
panel.add(load);
panel.add(save);
panel.add(subscribe);
panel.add(unsubscribe);
//Panel To A Frame
add(panel);
pack();
setVisible(true);
} //end ButtonsIcon Constructor
public static void main(String[] arguments) {
ButtonsIcons ike = new ButtonsIcons();
}
} //end ButtonsIcon Class
enter image description here
The easiest way is.
Label or Jbutton and what ever else supports HTML 3.5
JLabel a = new JLabel("");
add that to your container.
Haven't figured out how to enter code sorry
I'm trying to make button show a message when pressed, it's not working. Can anyone tell me what I missed?
In the end I have the KeyListener and the if for JOptionPane, but the website is not letting me post it (I'm new to this).
Anyway, it would be really nice if someone could tell me what I'm doing wrong, thanks.
public javalearning(){
FlowLayout f = new FlowLayout();
setLayout(f);
this.setSize(200,200);
JFrame j = new JFrame();
this.setTitle("this is a tittle");
JButton button = new JButton();
button.setText("Button");
this.add(button);
JButton button2 = new JButton();
button2.setText("Button2");
this.add(button2);
this.setVisible(true);
}
please follow example in this code and you will be fine. If at the end of the day you are unable to resolve it. you can write back. i believe this will help you.
import javax.swing.*;
import java.awt.event.*;
public class ChangeButtonLabel{
JButton button;
public static void main(String[] args){
ChangeButtonLabel cl = new ChangeButtonLabel();
}
public ChangeButtonLabel(){
JFrame frame = new JFrame("This is a Frame");
button = new JButton("Button");
button.addActionListener(new MyAction());
frame.add(button);
frame.setSize(400, 400);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public class MyAction implements ActionListener{
public void actionPerformed(ActionEvent e){
String text = (String)e.getActionCommand();
if (text.equals("Button2")){
button.setText("I am Sectona");
}
else{
button.setText("Click Me");
}
}
}
}
You state:
In the end I have the KeyListener and the if for JOptionPane,
As the tutorial that I've linked to in my comment will explain, you don't use KeyListeners with JButtons but rather ActionListeners.
e.g.,
myButton.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent evt) {
System.out.println("Button pressed");
}
});
You state:
but the website is not letting me post it (I'm new to this).
This site will let you post any reasonable amount of code. If you're having problems posting it, tell us the specifics of what's wrong, and maybe we can help you. Again, if you're trying to post code as an image, don't. It should be text that is formatted as code, not an image. But most important, don't keep us in the dark, or we can't help you.
like Hovercraft said, you will need to set ImagIcon(String image_name)
The code below will help you in embedding image on JButton. Give me a shout if you still find it difficult to integrate
import javax.swing.*;
import java.awt.*;
public class IconButton{
public static void main(String[] args){
JFrame frame = new JFrame("Icon on button");
JButton button = new JButton("Image button fro Sectona");
Icon imgicon = new ImageIcon("sectona.gif");
JPanel panel = new JPanel();
button.setIcon(imgicon);
panel.add(button);
frame.add(panel, BorderLayout.NORTH);
frame.setSize(400, 400);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
I'm following through a book called "The JFC Swing Tutorial (Second Edition)" and I'm pretty much at the start I have followed this code and it should be displaying the button and the label in the content pane, but All im getting is a blank screen. any ideas?
Thanks.
import java.awt.GridLayout;
import javax.swing.*;
public class m extends JFrame
{
void UserFrame()
{
//JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("Hellow You");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel jp = new JPanel(new GridLayout(0,1));
//makes label
JLabel label = new JLabel("Sup ");
//adds to the frames content pane a label
frame.getContentPane().add(label);
JButton button = new JButton("Hai");
frame.getContentPane().add(button);
jp.add(button);
jp.add(label);
jp.setBorder(BorderFactory.createEmptyBorder(30,30,10,30));
//pack set the window to what it needs AKA to display all components
frame.pack();
//frame.setSize(250, 250);
//shows window
frame.setVisible(true);
}
public static void main(String[] args)
{
final m window = new m();
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
window.UserFrame();
}
});
}
}
Simply add
frame.add(jp);
just before
frame.pack();
What's happening here? You correctly add all your widgets to a JPane, but you basically threw that JPane away and didn't use it anywhere.
This will be sufficient just to get it to work properly.
If you want to do it correctly, you should also remove frame.getContentPane().add(label); and frame.getContentPane().add(button); (Thank you #dic19 for noting that!). These will not work the way you used it.
I try to just use a add.method to add a button to a frame. But only the frame pops up.
I don't see any buttons.
import javax.swing.*;
public class okd {
public static void main() {
JFrame frame = new JFrame();
JButton b1 = new JButton();
frame.setSize(500,500);
frame.add(b1);
b1.setSize(400,400);
b1.setVisible(true);
frame.setVisible(true);
}
}
There is a button there. Add some text to it and it will magically appear.
public static void main(String[] args){
JFrame frame = new JFrame();
JButton b1 = new JButton();
frame.setSize(500,500);
b1.setSize(400,400);
b1.setVisible(true);
b1.setText("HelloWorld");
frame.add(b1);
frame.setVisible(true);
}//SSCCE1
Your button has been added to the frame. You'll notice a difference if you remove your frame.add() line. The 'problem' lies with the following.
You haven't specified a layout resulting in your frame using the
default BorderLayout manager.
You haven't specified a constraint in frame.add(). Because of this the
component has been added to whatever the default position is for the
layout which is BorderLayout.CENTER. Components added to the center
take up the much space as possible hence why your button is filling the entire frame.
Here's some tutorials on layout managers. You might want to have a read through these at some point.
To remove the Large appearance of the button, You need to add a layout Manager to the Code
Like this:
import javax.swing.*;
import java.awt.*;
public static void main(String[] args)
{
JFrame frame = new JFrame();
JButton b1 = new JButton();
frame.setSize(500,500);
b1.setVisible(true);
b1.setText("HelloWorld");
frame.setLayout(new FlowLayout());
frame.add(b1);
frame.setVisible(true);
}
the problem I encountered is weird for me, because I was doing everything step by step, correctly (in my opinion) and finally when I could say I finished one part of my program it appeared to make a fun of me. The actual problem is that in GUI I created I used a JPanel, then I've put it into a JTabbedPane which I've finally put into a JFrame. Everything is fine and works apart from times when it doesn't. I know it sounds strange, but after running program once I get what I wanted (Frame with tabbed pane containing panel with some stuff in it) and then when I run it again it either show the correct thing again or just empty frame. The worst thing is that it's so random, I haven't got a clue what can be wrong, I don't even know what exactly should I google to find it out. The code is:
import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.*;
public class GUI extends JFrame {
JFrame frame = new JFrame("WakeOnLan script generator");
JPanel panel1 = new JPanel(null);
JTextArea text; //= new JTextArea("test");
JScrollPane scroll = new JScrollPane();
JButton but = new JButton("test");
JTabbedPane tab = new JTabbedPane();
public GUI() {
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
int w = frame.getSize().width;
int h = frame.getSize().height;
int x = (dim.width-w)/3;
int y = (dim.height-h)/4;
frame.setSize(500,500);
frame.setLocation(x,y);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setLayout(null);
createTab1();
tab.addTab("Tab 1", panel1);
tab.setVisible(true);
tab.setBounds(0, 0, 500, 500);
frame.add(tab);
}
public void createTab1(){
text = new JTextArea("test");
text.setVisible(true);
scroll.setViewportView(text);
scroll.setBounds(10,10,465,300);
panel1.setLayout(null);
panel1.add(scroll);
panel1.setVisible(true);
panel1.setSize(500,500);
//panel.setBackground(Color.blue);
}
}
And then I just run it in the main method in other class:
public class GUIStarter {
public static void main(String[] args) {
GUI start = new GUI();
}
}
So could anyone give me an answer or just a hint?
Thank you.
You should call frame.setVisible(true) after adding all your components to your JFrame. So try moving it to the end of your constructor.
Alternatively, you can call frame.validate() after all the components have been added.