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Thread: lost

  1. #1
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    Default lost

    i'm trying to use a2d array to make a menubar

    why am i getting an error class expected at 48??


    import java.awt.*;
    import java.awt.event.KeyEvent;
    import javax.swing.*;
     
    public class Driver{
     
       public static void main(String[] args) {
          TheWindowObject aTestFrame = new TheWindowObject ("A MENU FOR YOU");  
     
          }
       }
    class TheWindowObject{
     
       TheWindowObject(String windowTitle)
       {
       CreateWindow () ;
       }
       TheWindowObject(String windowTitle, int height, int width){
       }
       JFrame CreateWindow (){
     
          String title ="test";
          int height =200 ;
          int width=400 ;
          JFrame frame= null;
     
          frame =new JFrame("A MENU FOR YOU");
          frame.setSize (width, height);
          frame.setVisible (true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
             generate();
             return frame;
          }
       }
    class MenuFactory {
     
    MenuFactory (String [][] menuInput)
    {}
     
     public JMenuBar generate()
    {
     JMenuBar generate= new JMenuBar();
     frame.setJMenuBar (generate);
    JMenu createMenu=null;
    JMenuItem createMenuItem = null ; 
    String  [][]menuInput= null;
    array();
    createMenu = new JMenu(menuInput[][]);
    generate.add(createMenu);
    return generate;
    }
     
    String [][]array (){
     
    String [][] menuInput ={{"File", "Edit", "Windows", "Help"},{"Open","Cut","First","About"},{"Close","Paste","Second", null},{"Exit","Copy",null, null},{null, "Select All", null, null,}};                    
       for (int row=0; row<array.length; row++){
       for ( int col=0; col< array[row].length; col++) 
       menuInput=(array[row][col]);
      }
      return menuInput;
       }
    }

    thanks


  2. #2
    Administrator copeg's Avatar
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    Default Re: lost

    Looking towards line 48....the constructor for JMenu
    createMenu = new JMenu(menuInput[][]);
    does not exist. You should iterate through your menu input arrays a populate that way. In addition, you need to assign your menuInput array
    menuInput = array();
    or when you loop through your array you will end up receiving a null pointer exception

  3. #3
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    Default Re: lost

    i would suggest you use object oriented approach where you put your test class and your methods in separate classes. that way it will be essay for you to debug and modify your code and its a good programming skill that you should develop..

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