How can I set an array

When the ReadingButton is clicked in Frame1, Frame1 disappears and Frame2 appears with blank data entry fields. This will enable me to enter data into the CustomerIdText field and CustomerReadingText field of frame 2. However this needs to be stored in an array, which I dont't quite know how to achieve. In addition I am having problems with the CustomerReadingButton which stores the data entered in the text fileds, explained above, and then clears the displayed data so that it is ready for a new set of data entries.

Could you please help me with the problems i have encountered asap.

Here is the text file for frame 1:

/**
 * Write a description of class Frame1 here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
import java.awt.*;
import java.awt.event.*;
class Frame1 extends Frame implements ActionListener    
   
    {
    private Button ReadingButton;
    private Button FaultsButton;
    private Button PotentialButton;
    private Button ListReadingButton;
    private Button ListFaultsButton;
    private Button ListPotentialButton;
    private Button ExitButton;
    private Frame2 frame2;
    private Frame3 frame3;
    private Frame4 frame4;
   
    public Frame1()
        {
        super();
        frame2 = new Frame2(this);
        frame3 = new Frame3(this);
        frame4 = new Frame4(this);
        ReadingButton = new Button("Customer reading data entry");
        FaultsButton = new Button("Customer reading with fault data entry");
        PotentialButton = new Button("Potential customer data entry");
        ListReadingButton = new Button("List readings");
        ListFaultsButton = new Button("List customers with faults");
        ListPotentialButton = new Button("List potential customers");
        ExitButton = new Button("Exit");
        setLayout(new GridLayout (7,1));
               
        add (ReadingButton);
        add (FaultsButton);
        add (PotentialButton);
        add (ListReadingButton);
        add (ListFaultsButton);
        add (ListPotentialButton);
        add (ExitButton);
       
        ReadingButton.addActionListener(this);
        FaultsButton.addActionListener(this);
        PotentialButton.addActionListener(this);
       
        setSize(700,400);
        setVisible(true);
       
       
        }
    public void actionPerformed(ActionEvent e)
        {
        if
        (e.getSource() == ReadingButton)
            {
            setVisible (false);
            frame2.setVisible(true);
            }
        else if
        (e.getSource() == FaultsButton)
            {
            setVisible (false);
            frame3.setVisible(true);
            }
        else if
        (e.getSource() == PotentialButton)
            {
            setVisible (false);
            frame4.setVisible(true);
            }
        else
      {
      frame2.dispose();
      dispose();
      System.exit(0);
      }
    }

  public static void main (String[] args)
    {
    Frame1 f = new Frame1();
    }
  }        

Here is the text file for frame2

/**
 * Write a description of class Frame2 here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
import java.awt.*;
import java.awt.event.*;
class Frame2 extends Frame implements ActionListener    
   
    {
    private Button ReturnButton;
    private Button CustomerReadingButton;
    private TextField CustomerIdText;
    private TextField CustomerReadingText;
    private Label CustomerIdLabel;
    private Label CustomerReadingLabel;
    private Panel CustomerIdPanel;
    private Panel CustomerReadingPanel;
    private Frame1 frame1;
    int[] CustomerId;
   
    public Frame2(Frame1 f)
        {
        super();
        frame1 = f;
        CustomerReadingButton = new Button("Enter customer reading");
        ReturnButton = new Button("Return to main window");
        CustomerIdText = new TextField(15);
        CustomerReadingText = new TextField(15);
        CustomerIdLabel = new Label("Customer id :");
        CustomerReadingLabel = new Label("Customer reading :");
        CustomerIdPanel = new Panel();
        CustomerReadingPanel = new Panel();
        setLayout(new GridLayout (4,1));
       
       
       
        CustomerIdPanel.add(CustomerIdLabel);
        CustomerIdPanel.add(CustomerIdText);
        CustomerReadingPanel.add(CustomerReadingLabel);
        CustomerReadingPanel.add(CustomerReadingText);
       
        add (CustomerIdPanel);
        add (CustomerReadingPanel);
        add (CustomerReadingButton);
        add (ReturnButton);
        CustomerReadingButton.addActionListener(this);
        ReturnButton.addActionListener(this);
        setSize(500,300);
        setVisible(false);
        }
       
       
               
        public void actionPerformed(ActionEvent e)
        {
        if(e.getSource() == ReturnButton)
        setVisible (false);
        frame1.setVisible(true);
        }
  }
  class CustomerId
            {
            public static void main(int[] args)
                {
                CustomerId = new int[5];
                int sum = 0;
                for(int i = 0; i < CustomerId.length; i = i ++)
               
                {
                CustomerId[i] = Integer.parseInt(t.getText());;
                }
  }

NOTE: Both files have been created in BLUE J, java software.