CODEWITHSUNDEEP
javaeclipseswt
Roman
Roman

Reputation: 131078

Why my SWT application does not work?

I am trying to create a Hello World SWT application using Eclipse. I follow all instructions and in the end my program does not work.

This is my code:

import gnu.gcj.xlib.Display;
import org.eclipse.swt.widgets.Shell;


public class HelloWorldSWT {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Hello world!");
        shell.open();
        while (!shell.isDisposed()) {
        if (!display.readAndDispatch()) display.sleep();
        }
        display.dispose();
    }

}

And this is my error messages:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
    The constructor Shell(Display) is undefined
    The method readAndDispatch() is undefined for the type Display
    The method sleep() is undefined for the type Display
    The method dispose() is undefined for the type Display

   at HelloWorldSWT.main(HelloWorldSWT.java:13)

Does anybody know how I can check what is wrong?

Upvotes: 0

Views: 6055

Answers (3)

rotarydial
rotarydial

Reputation: 2591

I made the same mistake. My issue was on the second step: I selected to import "org.eclipse.swt". Instead, you must select the correct one for your operating system. In my case, this was "org.eclipse.swt.win32.win32.x86". Once you've done this, the rest of the steps in the tutorial should work as expected.

The answers above, while correct, may assume a bit more knowledge than most completing this tutorial will have.

Upvotes: 0

alex
alex

Reputation: 1

Clean all in your folder, do it again, import swt create proj, check build path add class, run this should work. If not , right click , click clean up, click source... organize imports, run again. Should work, if error no

swt.dll

in your library, copy all

swt.dll

to your library path. Should work now.

Upvotes: 0

Marek Radonsky
Marek Radonsky

Reputation: 383

I think you're importing a wrong Display class. The right one should be

org.eclipse.swt.widgets.Display

Upvotes: 8

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