OP Passing methods

Question

Soz, the other post seemed to be getting a bit long. Everything is working great now guys, just 1 little problem, I will post all the code so that you can see. And just in case this makes a difference but all three of these classes are on seperate pages but i do have them all up and compiled when i use them together.
So this is my first class, it creates an album object:
import javax.swing.*;
public class Album
String CDname;
public Album (String cd)
CDname= cd;     
}Then i have my album list class which has many methods and at the bottom it creates a new list using the insert method:
import javax.swing.*;
public class AlbumList
final int DEFAULT_SIZE = 6;
int count;
Album[] data;
String[] list;
public AlbumList()
data = new Album[DEFAULT_SIZE];
count = 0;
public AlbumList(int size)
data = new Album[size];
count = 0;
public void insert( Album  myAlbum )
data[count] = myAlbum;
count++;
public void remove()
count--;
public Album[] getList()
return data;
AlbumList myList = new AlbumList();
public void insert() {
   String cd = JOptionPane.showInputDialog("Enter CD name:");
   if (cd!=null) {
     Album album = new Album(cd);
     myList.insert(album);
Album[] example = myList.getList();
}I then have my main application, this is how it looks at the moment:
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
import javax.swing.*;
import javax.swing.border.*;
import java.util.*;
import java.util.Timer;
import java.util.TimerTask;
import java.awt.event.KeyListener;
public class Assignment extends JFrame
     private JLabel MusicCdDatabaseJLabel;
     private JLabel AddEntryJLabel;
    private JButton AddEntryJButton;
    private JLabel SearchJLabel;
    private JButton SearchJButton;
    private JLabel SaveJLabel;
    private JButton SaveJButton;
    private JLabel LoadJLabel;
    private JButton LoadJButton;
public Assignment()
   createUserInterface();
private void createUserInterface()
          Container contentPane = getContentPane();
          contentPane.setLayout( null );
          MusicCdDatabaseJLabel = new JLabel();
          MusicCdDatabaseJLabel.setBounds( 80, 19, 435, 28 );
          MusicCdDatabaseJLabel.setText( "MUSIC CD DATABASE" );
          MusicCdDatabaseJLabel.setFont(new Font( "Default", Font.BOLD, 22 ) );
          MusicCdDatabaseJLabel.setHorizontalAlignment(JLabel.CENTER );
          contentPane.add( MusicCdDatabaseJLabel );
          AddEntryJButton = new JButton();
          AddEntryJButton.setBounds(16, 111, 170, 32 );
          AddEntryJButton.setText( "Add a new record" );
          AddEntryJButton.setFont(new Font( "Default", Font.BOLD, 16 ) );
          AddEntryJButton.setHorizontalAlignment(JLabel.CENTER );
          contentPane.add( AddEntryJButton );
          AddEntryJButton.addActionListener(
          new ActionListener() // anonymous inner class
            // event handler called when AddJButton is pressed
            public void actionPerformed( ActionEvent event )
               AddEntryJButtonActionPerformed( event );
         } // end anonymous inner class
      ); // end call to addActionListener
        SearchJButton = new JButton();
          SearchJButton.setBounds(16, 170, 170, 32 );
          SearchJButton.setText( "Search for a CD" );
          SearchJButton.setFont(new Font( "Default", Font.BOLD, 14 ) );
          SearchJButton.setHorizontalAlignment(JLabel.CENTER );
          contentPane.add( SearchJButton );
          SearchJButton.addActionListener(
          new ActionListener() // anonymous inner class
            // event handler called when searchJButton is pressed
            public void actionPerformed( ActionEvent event )
               SearchJButtonActionPerformed( event );
         } // end anonymous inner class
      ); // end call to addActionListener
        SaveJButton = new JButton();
          SaveJButton.setBounds(16, 229, 170, 32 );
          SaveJButton.setText( "Save current database" );
          SaveJButton.setFont(new Font( "Default", Font.BOLD, 14 ) );
          SaveJButton.setHorizontalAlignment(JLabel.CENTER );
          contentPane.add( SaveJButton );
          SaveJButton.addActionListener(
          new ActionListener() // anonymous inner class
            // event handler called when saveJButton is pressed
            public void actionPerformed( ActionEvent event )
               SaveJButtonActionPerformed( event );
         } // end anonymous inner class
      ); // end call to addActionListener
        LoadJButton = new JButton();
          LoadJButton.setBounds(16, 288, 170, 32 );
          LoadJButton.setText( "Load a database" );
          LoadJButton.setFont(new Font( "Default", Font.BOLD, 14 ) );
          LoadJButton.setHorizontalAlignment(JLabel.CENTER );
          contentPane.add( LoadJButton );
          LoadJButton.addActionListener(
          new ActionListener() // anonymous inner class
            // event handler called when LoadJButton is pressed
            public void actionPerformed( ActionEvent event )
               LoadJButtonActionPerformed( event );
         } // end anonymous inner class
      ); // end call to addActionListener
          setTitle( "MUSIC CD DATABASE" );
          setSize( 600, 700 );         
          setVisible( true );          
   } //end of create user interface
private void AddEntryJButtonActionPerformed( ActionEvent event )
    insert();
   } // end method AddEntryJTextFieldActionPerformed
private void SearchJButtonActionPerformed( ActionEvent event )
   } // end method SearchJButtonActionPerformed
private void SaveJButtonActionPerformed( ActionEvent event )
   } // end method SearchJButtonActionPerformed
private void LoadJButtonActionPerformed( ActionEvent event )
   } // end method SearchJButtonActionPerformed
public static void main( String[] args )
      Assignment application = new Assignment();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}The first two compile fine but the main application comes back with cannot find symbol method insert(). is this because this method is a void? I canr work out why it wont compile, everything else seems to be in place. Where am i going wrong? cheers

Answer 1

Kool, i have removed the instance from the albumList class and created my inset method in there. So i presume its the same with the Album[] getList() method. I still think i am not getting the proper meaning of how to do things correctly but this is what i am doing. this isnt being done in my main of my assignment class but under public class assigment, if that makes a difference. This is what i dont for the insert method and it works fine
public void insert() {
    String cd = JOptionPane.showInputDialog("Enter CD name:");
    if (cd!=null) {
     Album album = new Album(cd);
     myList.insert(album);
}This is what i have attempted for my Album[] getList() method.
Album[] data;
    public Album[] getList()
    for (int x=12; x>=0; x--) //for loop to check every object in all arrays
    System.out.println(data[x]);
    return data;
    }I dont know if i am on the right tracks all i know is that it doesnt work. What is really confusing me is all these names. In my full code at the top, is my array data, myList, myAlbum etc