Thread: Need help adding background image (noob here)

Hello fine sirs. I was wondering how a gentlemen like myself would go upon adding a background image into my Java GUI program. I have absolutely no clue as to where I should start

Well, there are a couple of places that you could start. What do you have so far?

I am going to assume that GBFrame is extending JFrame. Correct me if I am wrong.

Take a look at Container (Java 2 Platform SE v1.4.2) This is the container class which contains the all-powerful paint() function.

paint(Graphics g) is passed a graphics object.
See Graphics (Java 2 Platform SE v1.4.2)

Notice that the second link lists a ton of methods for the Graphics object. I'm sure there is one in there for drawing an image

Here it is:
Removed due to one of the "helpers" only having one damn post. Don't want kids to steal my hard work. I guess I'll find help elsewhere.[/QUOTE]

Whoa. Hey now. Don't be making assumptions. Although I made this account today, I have been programming in Java for quite some time.

Originally Posted by Jams

I am going to assume that GBFrame is extending JFrame. Correct me if I am wrong.

Take a look at Container (Java 2 Platform SE v1.4.2) This is the container class which contains the all-powerful paint() function.

paint(Graphics g) is passed a graphics object.
See Graphics (Java 2 Platform SE v1.4.2)

Notice that the second link lists a ton of methods for the Graphics object. I'm sure there is one in there for drawing an image

Thank you. I don't know if it is an extension or not. I'll be sure to try out the Container.

Edit: Sorry to offend but you made the account today D: My defense mode tends to go up when stuff like that happens.

No offense taken.

Let me know if you need further help.

Originally Posted by Jams

No offense taken.

Let me know if you need further help.

Okay I am a bit confused to where I would put code like this

public abstract boolean drawImage(Image img,
                                  int x,
                                  int y,
                                  int width,
                                  int height,
                                  ImageObserver observer)

Do you remember the paint() function?

In the end it should look something like:

paint (Graphics g)
{
g.drawImage(parameters)
}

You should just be able to use null in place of the image observer. Other wise, x and y are the location of the upper right hand corner of the image. Width and Height are just the dimensions of the image.

Originally Posted by JavaPF

What's the problem with receiving replies from people who have only just joined? Experienced Java programmers join here every day. The amount of posts/time joined doesn't dictate the skill level.

If you want quality replies then you need to keep your code posted for us all to see. Thanks for your help Jams.

Fine sir. Here is my code. I still haven't found a way that works. I am definitely doing something wrong.

import java.awt.*;    
import BreezyGUI.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.awt.Graphics;
import java.awt.Image;
//import java.net.InetAddress;
//import java.net.UnknownHostException;
//import java.io.IOException;
 
public class Mainwin extends GBFrame 
{
 
   	private Label iplabel;
   	private Label statuslabel;
   	private Label bsizelabel;
   	private Label dossetlabel;
   	private Label firstoplabel;
   	private Label ncountlabel;
   	private Label secondoplabel;
 
   	private TextField ipfield;
   	private TextField response;
   	private TextField response2;
   	private TextField firstopfield;
   	private TextField secondopfield;
   	private TextField ncountfield;
   	private TextField bsizefield;
 
   	private Button pingem;
   	private Button slapem;
   	private Button clear;
   	private Button exit;
   	private Button defaultdos;
 
   	Mainwin ()
   	{	
   		iplabel = addLabel ("IP / URL:",1,1,2,1);
   		statuslabel = addLabel ("Status:",3,1,1,1);
   		dossetlabel = addLabel ("Denial of Service Settings:",5,1,2,1);
   		bsizelabel = addLabel ("Size of buffer packet:",9,1,2,1);
   		firstoplabel = addLabel ("First option (t,a):",6,1,2,1);
   		secondoplabel = addLabel ("Second option (t,a):",7,1,2,1);
   		ncountlabel = addLabel ("Number of echo requests:",8,1,2,1);
 
   		ipfield = addTextField ("",1,2,2,1);
   		response = addTextField ("",3,2,2,1);
   		response2 = addTextField ("",4,2,2,1);
   		firstopfield = addTextField ("",6,3,1,1);
   		secondopfield = addTextField ("",7,3,1,1);
   		ncountfield = addTextField ("",8,3,2,1);
   		bsizefield = addTextField ("",9,3,2,1);
 
   		pingem = addButton ("Ping em!",2,1,1,1);
   		slapem = addButton ("DoS em!",10,1,1,1);
   		defaultdos = addButton ("Recommended DoS Settings",10,2,1,1);
   		clear = addButton ("Clear all fields",2,2,1,1);
   		exit = addButton ("Exit",10,4,1,1);
   	}
 
   	public void buttonClicked(Button buttonObj)
   	{
   		String ip,firstop,secondop,ncount,bsize;
 
   		if (buttonObj == pingem)
   		{
   		 response.setText("");
   		 response2.setText("");
 
         try
         {
        	 String[] command =  new String[4];
        	 ip = ipfield.getText();
             String ping = ip;
        	 command[0] = "cmd";
        	 command[1] = "/C";
        	 command[2] = "ping";
        	 command[3] = ping;
 
        	 Process p = Runtime.getRuntime().exec(command);
 
        	 BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
 
        	 BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
 
 
         	String s = null;
         	while ((s = stdInput.readLine()) != null) {
         		response.setText(s);
         	}
 
         	while ((s = stdError.readLine()) != null) {
         		response.setText(s);
         	}
         	response2.setText("Host is alive. Ping successful.");
         }
 
 
         catch(Exception e){  
        	 		response2.setText("Fatal Error! Please clear all values now!");
			 	}
   		}	
 
 
   		 if (buttonObj == slapem)
 		 {
   			response.setText("");
   	   		response2.setText("");
   			ip = ipfield.getText();
   			firstop = firstopfield.getText();
   			secondop = secondopfield.getText();
   			bsize = bsizefield.getText();
   			ncount = ncountfield.getText();
 
 
   			try
            {
           	 String[] command = new String[8];
           	 ip = ipfield.getText();
                String ping = ip;
           	 command[0] = "cmd";
           	 command[1] = "/C";
           	 command[2] = "ping";
           	 command[3] = "-" + firstop;
           	 command[4] = "-" + secondop;
           	 command[5] = ping;
           	 command[6] = "-l " + bsize;
           	 command[7] = "-n " + ncount;
 
           	 Process p = Runtime.getRuntime().exec(command);
 
           	 BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
 
           	 BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
 
 
 
            	String s = null;
            	while ((s = stdInput.readLine()) != null) {
            		response.setText(s);
 
            	}
 
 
            	while ((s = stdError.readLine()) != null) {
            		response.setText(s);
            	}
            	response2.setText("Host is alive and is being DOS'd.");
            }
 
 
            catch(Exception e){  
   					response2.setText("Fatal Error! Please clear all values now!");
   			 	}
 
 		 }
 
   		 if (buttonObj == clear)
   		 {
   			ipfield.setText("");
   			response.setText("");
   			response2.setText("");
   			ipfield.setText("");
   	   		response.setText("");
   	   		response2.setText("");
   	   		firstopfield.setText("");
   	   		ncountfield.setText("");
   	   		bsizefield.setText("");
   		 }
 
   		 if (buttonObj == defaultdos)
   		 {
   			firstopfield.setText("t");
   	   		ncountfield.setText("1000000");
   	   		bsizefield.setText("65500");
   		 }
 
   		 if (buttonObj == exit)
  		 {
   			System.exit(0);
  		 }
 
 
   	}
 
 
 
}

I don't see any code there that tries to set a background - no wonder it's not working!

Originally Posted by JavaPF

If you want quality replies then you need to keep your code posted for us all to see. Thanks for your help Jams.

Anytime. I am willing to help whenever I can.

--Jams

Hey dude I just solved this problem for myself. Here is a cutout from one of my programs. see what you can make of it.

the code concerning your problem is in the (MUHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAH AHAHA) section.

Basically I made a JFrame then added a background panel(1) and set its layout to "OverlayLayout". then created a second panel(2) where I loaded the background image. lastly I made a panel(3) that would contain all of my components. I then added 2 and 3 to 1. and voila.

PS there is a little problem concerning the buttons and Labels disapearing. Im following it up and as soon as I have the solution ill let you know.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
import java.awt.*;
import javax.swing.*;
import java.io.*;

public class HomeScreen extends JPanel
{
//public variables
JFrame home;
ImageIcon icon;

public HomeScreen()
throws IOException
{
initframe();
components();
}

void initframe()
throws IOException
{
home = new JFrame();
home.setSize(600,400);
home.setTitle("Program");
home.setVisible(true);
home.setResizable(true);
home.setLocationRelativeTo(null);
home.setDefaultCloseOperation(javax.swing.WindowCo nstants.DISPOSE_ON_CLOSE);

}

void components()
throws IOException
{


//panels & setting the background (MUHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAH AHAHA)
JPanel backg = new JPanel();
LayoutManager layout = new OverlayLayout(backg);
backg.setLayout(layout);
home.add(backg);

JPanel backimage = new JPanel();
ImageIcon image = new ImageIcon("saflag.jpg");
backimage.add(new JLabel(image));
backg.add(backimage);

JPanel pcomp = new JPanel();
pcomp.setLayout(new GridLayout(2,2,5,5));
home.add(backg);
backg.add(pcomp);

//images and rescaling
ImageIcon icon1 = new ImageIcon("ENTER ANY IMAGE HERE");
Image image1 = icon1.getImage().getScaledInstance(200, 100, Image.SCALE_SMOOTH);
icon1.setImage(image1);

ImageIcon icon2 = new ImageIcon("ENTER ANY IMAGE HERE");
Image image2 = icon2.getImage().getScaledInstance(200, 100, Image.SCALE_SMOOTH);
icon2.setImage(image2);

// labels
JLabel lab1 = new JLabel(" ARE YOU SOUTH AFRICAN?");
lab1.setBounds(0,0,200,40);
pcomp.add(lab1);

JLabel lab2 = new JLabel(" ARE YOU ENGLISH?");
lab2.setBounds(0,0,200,40);
pcomp.add(lab2);
//buttons
JButton b1 = new JButton(icon1);
b1.setBounds(0,0,500,300);
pcomp.add(b1);

JButton b2 = new JButton(icon2);
b2.setBounds(0,0,300,300);
pcomp.add(b2);
}
public static void main(String[] args)
throws IOException
{
new HomeScreen();
}
}
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