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Thread: Class inside a class

  1. #1
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    Lightbulb Class inside a class

    Hello,

    I'm trying to create a class (TextAnalyzer) which contains another class (GUI_Interface). I want to create a GUI_Interface object (called fereastra) in TextAnalyzer's public static void main() function. But I get an error here: GUI_Interface fereastra = new GUI_Interface();

    I'm using Eclipse JUNO. If I try to write the classes separately (not one inside the other), it also shows an error, telling me that I have to put each class into its separate file. I'd like to avoid doing that because I'll use a lot of classes (it's a complex project), and I'm trying group the classes as much as I can.

    This is my code:
     
    import javax.swing.*;
    import java.awt.Color;
     
     
     
    public class TextAnalyzer {
     
     
    	public class GUI_Interface extends JFrame{
     
    		public GUI_Interface(){
     
    			super("Psy Analyzer");
    			super.setBounds(100, 50, 800, 800);
    			super.setBackground(Color.WHITE);
     
    			JPanel content  = new JPanel();
     
    			JLabel eticheta = new JLabel("Drag file here");
    			content.add(eticheta);
     
    			this.getContentPane().add(content);
     
    		}
     
    	}
     
    	public static void main(String args[]){
     
    		GUI_Interface fereastra = new GUI_Interface();		
    		//window 
    		fereastra.setVisible(true);
    	}
     
     
     
     
     
    }


  2. #2
    Senior Member PhHein's Avatar
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    Default Re: Class inside a class

    If I try to write the classes separately (not one inside the other), it also shows an error, telling me that I have to put each class into its separate file.
    The name of the java file has to be identical to the class name.
    I'd like to avoid doing that because I'll use a lot of classes (it's a complex project), and I'm trying group the classes as much as I can.
    Bad idea. Use packages.

    Also you should start a GUI from the EDT. You're asking for trouble with that code.

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