Adding data to a text box on another class

Hi,

I have a class that creates a GUI interface with a text box on it.
I want to be able to add text into the text box from another class but I can't seem to do it.

Does anyone have any examples they can share?

Thanks

Post what you've done and where you need help (doing so as an SSCCE will strengthen your chance of getting quicker and more meaningful response).

ok thanks.

So this is my main class where I have created what is now a ListBox and a button. When I click on the button I want to be able to load a set of results from a csv file and add them to the lisbox.

thanks

Code java:

---

import org.eclipse.swt.widgets.Display;
 
public class guiwindow {
 
	protected Shell shell;
 
	/**
	 * Launch the application.
	 * @param args
	 */
	public static void main(String[] args) {
		try {
			guiwindow window = new guiwindow();
			window.open();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
 
	/**
	 * Open the window.
	 */
	public void open() {
		Display display = Display.getDefault();
		createContents();
		shell.open();
		shell.layout();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
	}
 
	/**
	 * Create contents of the window.
	 */
	protected void createContents() {
		shell = new Shell();
		shell.setSize(450, 300);
		shell.setText("SWT Application");
 
		List lstItems = new List(shell, SWT.BORDER);
		lstItems.setBounds(10, 10, 197, 242);
 
		Button btnLoadFile = new Button(shell, SWT.NONE);
		btnLoadFile.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseUp(MouseEvent e) {
				[B][COLOR="red"]//run import from csv here[/COLOR][/B]
			}
		});
		btnLoadFile.setBounds(220, 10, 75, 25);
		btnLoadFile.setText("Load File");
 
	}
 
}
 
 
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.StringTokenizer;
 
public class CSVFileReader {
 
	ArrayList <String>storeValues = new ArrayList<String>();
	ArrayList <String>CleanList = new ArrayList<String>();
	private String fileName;
 
	public CSVFileReader(String FileName)	{		
		this.fileName=FileName;	} 
 
	public ArrayList<String> ReadFile()
	{
		try {
			//storeValues.clear();//just in case this is the second call of the ReadFile Method./
			BufferedReader br = new BufferedReader( new FileReader(fileName));
 
			StringTokenizer st = null;
			int lineNumber = 0, tokenNumber = 0;
 
			while( (fileName = br.readLine()) != null)
			{
				lineNumber++;
				//System.out.println(fileName);
				storeValues.add(fileName);
				//break comma separated line using ","
				st = new StringTokenizer(fileName, ",");
 
				while(st.hasMoreTokens())
				{	
 
					//System.out.println("Line # " + st.nextToken());
					CleanList.add(st.nextToken());
 
				}
 
				//reset token number
				tokenNumber = 0;
 
			} 
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return CleanList;
 
	}
 
 
	//mutators and accesors 
 
	public void displayArrayList()
	{
		for(int x=0;x<this.CleanList.size();x++)
		{
			System.out.println(CleanList.get(x));
		}
	}
 
}

---

ok to fix it i did the following

public class guiwindow {

protected Shell shell;
public List lstItems;

/**
* Launch the application.
* @param args
*/
public static void main(String[] args) {
try {
guiwindow window = new guiwindow();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* Open the window.
*/
public void open() {
Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}

/**
* Create contents of the window.
*/
protected void createContents() {
shell = new Shell();
shell.setSize(450, 300);
shell.setText("SWT Application");

lstItems = new List(shell, SWT.BORDER);
lstItems.setBounds(10, 10, 197, 242);

Button btnLoadFile = new Button(shell, SWT.NONE);
btnLoadFile.addMouseListener(new MouseAdapter() {
@Override
public void mouseUp(MouseEvent e) {
//run import from csv here
}
});
btnLoadFile.setBounds(220, 10, 75, 25);
btnLoadFile.setText("Load File");

}

}