Thread: Scope problem

import java.awt.*;
import javax.swing.*; 
import java.awt.event.*;
 
class ImageViewer{
 
	public static void main(String[]args){
 
		createWindow("Image Viewer");
		createIcon("Desert.jpg");
		addIconToGraphicalComponent();
 
	}
 
	public static void createWindow(String windowName){
 
		JFrame window = new JFrame(windowName);
		window.setSize(600,400);
		window.setDefaultCloseOperation(window.EXIT_ON_CLOSE);
		window.setResizable(false);
		window.setVisible(true);
 
	}
 
	public static void createIcon(String fileName){
 
		ImageIcon icon = new ImageIcon(fileName);
 
	}
 
	public static void addIconToGraphicalComponent(){
 
		JLabel label = new JLabel(icon);
 
	}
 
	public static void addGraphicalComponentToWindow(){
 
		Container windowContentPane = window.getContentPane();
		windowContentPane.add(label);
 
	}
 
 
}

I believe I am getting scope error messages. They are all similar (3 of them) so ill just mention one of them.

For the line "JLabel label = new JLabel(icon);" it says "cannot find symbol" and points towards the icon object. As far as i can tell it cannot find the icon object as it is created in a different method, how can I overcome this without having to put it all into one method?

P.S, I'm not trying to do anything in particular, just "messing".

Make your create icon method return the icon objevt it creates

Chris

And pass it as an argument to the method that needs it.

I now have got rid of the scope problem, but I have another, heres the code:

import java.awt.*;
import javax.swing.*; 
import java.awt.event.*;
 
class ImageViewer{
 
	public static void main(String[]args){
 
		JFrame window = createWindow();
		ImageIcon icon = createIcon("Desert.jpg");
		JLabel label = addIconToGraphicalComponent(icon);
		addGraphicalComponentToWindow(window, label);
		addMenuToWindow(window);
 
 
	}
 
	public static JFrame createWindow(){
 
		JFrame window = new JFrame("Image Viewer");
		window.setSize(600,400);
		window.setDefaultCloseOperation(window.EXIT_ON_CLOSE);
		window.setResizable(false);
		window.setVisible(true);
		return window;
 
	}
 
	public static ImageIcon createIcon(String fileName){
 
		ImageIcon icon = new ImageIcon(fileName);
		return icon;
 
	}
 
	public static JLabel addIconToGraphicalComponent(ImageIcon icon){
 
		JLabel label = new JLabel(icon);
		return label;
 
	}
 
	public static void addGraphicalComponentToWindow(JFrame window, JLabel label){
 
		Container windowContentPane = window.getContentPane();
		windowContentPane.add(label);
 
	}
 
	public static void addMenuToWindow(JFrame window){
 
		JMenuBar windowMenuBar = new JMenuBar();
 
		JMenu fileMenu = new JMenu("File");
 
		JMenuItem openItem = new JMenuItem("Open Image");
		JMenuItem exitItem = new JMenuItem("Exit Application");
 
		fileMenu.add(openItem);
		fileMenu.add(exitItem);
 
		windowMenuBar.add(fileMenu);
 
		window.setJMenuBar(windowMenuBar);
 
 
	}
 
 
}

I dont get any error, the problem is when the app is running. When i run the application the window does NOT have an image nor does it have a menu bar. But if i minimise the window then maximise it the image and menu bar then appears?

Oh and thanks for your posts before.

Do you call setVisible(true) before you add anything to the frame?
Wait until after you have added components to it.

weyy thanks