Question

I’m new to Java and I want to add a background image to a Composite. I can only use SWT, no JFace. I’m using eclipse indigo IDE (3.8) and when I want to set a background image, first I initialize an Image class to an image object, but when I press CTRL + SPACE to help choosing the constructor, I have 5 different constructors. I don’t know what to choose.

I must use a relative path. The package has the following structure:

org.mypackage.program //the package name
org.mypackage.program/src/org.mypackage.program //the plugin-project automated created classes
org.mypackage.program/src/views // all views

org.mypackage.program/car_image.jpg // the image what I would set in background
org.mypackage.program/views/View.java // the class where I want to set the background

This is what I made, but it’s not working:

Image image = new Image(Display.getCurrent(),  this.getClass().getClassLoader().getResource("car_image.jpg"));
compImage.setBackgroundImage(image);

I’m new to OOP too, I programmed only structured/module programs.

Answer 1

please try below code:-

Please note, how the relative path is mentioned

.\\src\\org\\mypackage\\program\\car_image.gif

Here src is the root folder of application.

---

package org.mypackage.program;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class Demo {
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
            Display display = new Display();
            Shell shell = new Shell(display);
            Image img;
            shell.setMaximized(true);
            img= new Image(display,".\\src\\org\\mypackage\\program\\car_image.gif");
            Composite comp= new Composite(shell, SWT.NONE);
            comp.setBackgroundImage(img);
            shell.setLayout(new FillLayout());
            shell.open();
            while (!shell.isDisposed())
            {       
                if (!display.readAndDispatch())
                {         
                    display.sleep();       
                }     
            }     
            display.dispose();
    }
}