Add image from URL in jPanel - java

I have a small problem, I have tried different solutions to add a image from URL in my jPanel, but I don't succeed. This is how my jPanel looks like:
import javax.swing.DefaultListModel;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import java.awt.Color;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
public class Hello extends JPanel{
JPanel panel = new BackgroundPanel();
JPanel HomeWindowPanel;
JLabel secondlbl = new JLabel("Hello");
public Hello () {
//I want to add a picture here from URL
}
}
I would really appreciate if somebody could show me how to do it.


Check out this sample code:
http://docs.oracle.com/javase/tutorial/displayCode.html?code=http://docs.oracle.com/javase/tutorial/uiswing/examples/components/LabelDemoProject/src/components/LabelDemo.java
Specifically the createImageIcon method.

Related

Referencing an object from another class

I've been fiddling with TabbedPanes, and I wish to be able to use a method in another class to set which tab is selected.
However, when attempting to do this, I am provided with two errors.
First, it tells me that the parameter 'name' that I have provided the method in the second class has 'private access in Component'
error: name has private access in Component
TabbedPanes.name.setSelectedIndex(0);
Second, it tells me that it cannot find the symbol for the method I wish to call from within the second class' custom method.
error: cannot find symbol
TabbedPanes.name.setSelectedIndex(0);
^
symbol: method setSelectedIndex(int)
location: variable name of type String
My first class, TabbedPanes, can be found below:
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.BoxLayout;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Dimension;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;
public class TabbedPanes extends JFrame implements ActionListener
{
JTabbedPane tabs;
JPanel pan1, pan2, pan3, pan4, pan5, pan6, pan7, pan8;
JFrame frame;
JScrollPane scroll1, scroll2, scroll3, scroll4, scroll5, scroll6, scroll7, scroll8;
public void Tabs()
{
tabs = new JTabbedPane();
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pan1 = new JPanel(new FlowLayout(FlowLayout.LEFT));
JScrollPane scroll1 = new JScrollPane(pan1);
scroll1.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroll1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
pan2 = new JPanel();
pan3 = new JPanel();
pan4 = new JPanel();
pan5 = new JPanel();
pan6 = new JPanel();
pan7 = new JPanel();
pan8 = new JPanel();
JScrollPane scroll8 = new JScrollPane(pan8);
scroll8.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroll8.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
Container pane = frame.getContentPane();
pane.add(tabs);
tabs.add("Mon", scroll1);
tabs.add("Tue", pan2);
tabs.add("Wed", pan3);
tabs.add("Thu", pan4);
tabs.add("Fri", pan5);
tabs.add("Sat", pan6);
tabs.add("Sun", pan7);
tabs.add("Notes", scroll8);
Dates datesObject = new Dates();
datesObject.tabOnStartup("tabs");
frame.setSize(400,400);
frame.setVisible(true);
}
public static void main(String[] args)
{
TabbedPanes TrueTabs = new TabbedPanes();
TrueTabs.Tabs();
}
}
The second class, Dates, can be found below:
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.BoxLayout;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Dimension;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;
public class Dates
{
public void tabOnStartup(String name)
{
TabbedPanes.name.setSelectedIndex(0);
}
Any help will be greatly appreciated, and I hope my code is clean enough to read well.

If I got you right, you have to change the variable JTabbedPane tabs in class TabbedPanes to static:
static JTabbedPane tabs;
Also in class Dates you have to use
TabbedPanes.tabs.setSelectedIndex(0);
instead of
TabbedPanes.name.setSelectedIndex(0);
It seems that you have not implemented a method in class TabbedPanes :
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
If you are using IDE like Eclipse, NetBeans, etc. you should've received an error message like
- The type TabbedPanes must implement the inherited abstract method
ActionListener.actionPerformed(ActionEvent)
After these ammendments the result is:

JCreator not recognizing RBG Color in JFrame

I am trying to create an object of the class Color in awt to add it to the background of my JFrame ..but JCreator keep giving me this error message :
.java:23: error: cannot find symbol
getContentPane().setBackground(Color.color);
^
symbol: variable color
location: class Color
1 error
even when I am importing the Color class ... here is part of my code:
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.ImageIcon;
import java.awt.event.*;
import javax.swing.BorderFactory;
import java.awt.Font;
import java.awt.Color;
public class myframe extends JFrame implements ActionListener
{
public myframe()
{
setLayout(null);
Color color = new Color(135,206,235);
// Color skyblue = new Color((float)135,(float)206,(float)235);
getContentPane().setBackground(Color.color);
ImageIcon icon = new ImageIcon("horizntal logo.gif");
setIconImage(icon.getImage());

Java swing: image not loading

I'm trying to load an image but my code continuously enters the catch statement. I followed the example provided on: http://docs.oracle.com/javase/tutorial/2d/images/examples/LoadImageApp.java.
I really don't understand what the programming error is here.
import java.awt.Color;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.accessibility.Accessible;
import javax.imageio.ImageIO;
import javax.swing.*;
public class RackBuilder extends javax.swing.JFrame {
BufferedImage img;
/**
* Creates new form RackBuilder
*/
public RackBuilder() {
initComponents();
JPanel rackGrid = new JPanel(new GridLayout(42,0));
try {
img = ImageIO.read(new File ("alexi.jpg"));
} catch (IOException e){
System.out.println("Image could not be read.");
System.exit(1);
}
add(rackGrid);
}
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new RackBuilder().setVisible(true);
}
});
}
Thanks!

Trying to Place Order- nothing shows up on screen

Trying to Place Order nothing shows up on screen but I want to show a textarea saying:
Here's Sandwhich with the topping u provided
Can you help me?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.GridLayout;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
public void setCheese(String s) {
cheese = s;
}
public String getCheese() {
return cheese;
}}

You should be getting a NullPointerException makeASandwih as sandwich is null, then you try and call an instance method
protected void makeASandwich() {
Sandwich sandwich = null;
sandwich.setCheese(jcbcheese.getItemAt(jcbcheese.getSelectedIndex()));
Try creating a new instance of Sandwich
protected void makeASandwich() {
Sandwich sandwich = new Sandwich();
sandwich.setCheese(jcbcheese.getItemAt(jcbcheese.getSelectedIndex()));

Java Swing + Timer? Moving a line across JPanel

What I'm trying to do is simple. I have a JLayeredPane with two panels inside of it. Panel 2 (higher Z index) has a transparent background and only displays a Line2D element that goes from Y = 0 to Y = max. I need the X value to increment every so many milliseconds, and then redraw the line. I have everything set up to do so, except I can't figure out how to do the bar movement via timing.
I've done some research and every time I saw mentions of the timer class (Which I feel would be able to accomplish what I'm trying to do) people recommend not using it. I can't figure out an alternative to using the timer class in order to slide my bar across the screen.

Hope this code helps you. It does exactly what you want.
import javax.swing.JFrame;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Random;
import java.util.Arrays;
import java.awt.EventQueue;
import javax.swing.JFrame;
public class FloorPlaner extends JFrame {
public int x=0;
public FloorPlaner(){
super("FloorPlaner");
requestFocus();
setContentPane(new DrawingPane());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(400, 400);
setResizable(true);
setVisible(true);
while (true) {
x++;
repaint();
try {
Thread.sleep(40); //25 FPS
} catch(InterruptedException bug) {
Thread.currentThread().interrupt();
System.out.println(bug);
}
}
}
class DrawingPane extends JPanel { //Where you actually draw on
public void paintComponent(Graphics g) { //Drawing method
g.drawLine(x,0,x,400);
}
}
public static void main(String args[]) {
new FloorPlaner(); //Start it
}
}

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