Making a "next" button to move through a array.

I have been stressing over this for a few days now and just can not seem to get it to work. Basically I have an array and a GUI, the GUI displays the information from the first index in the array. I have created a button that when pushed DOES cycle to the next index but then will no longer work. I also need to create a button that cycles backwards and then one that jumps to the first and last index's. Of course I know how to make the buttons just not the rest of the code.

I really hope some one could give me some pointers with this

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.Border;

publicclass InventoryProgramGUIextends JFrameimplements ActionListener

{

private Container content = getContentPane();

private JPanel panel;

private BluRayGUI movieArray[] =new BluRayGUI[10];

private JComboBox jcbMovieList;

public InventoryProgramGUI()

{

initializeData();// call method initializeData

content.setLayout(null);

panel =new JPanel();

panel.setLayout(null);

buildProductPanel(0);// Call method to display info in GUI

panel.setBounds(0, 50, 480, 170);

content.add(panel);

//jcbMovieList = new JComboBox();

//for(int i = 1; i<=movieArray.length; i++)

//jcbMovieList.addItem(""+1);

JButton button =new JButton("Next");// Make the next button

button.setBounds(200, 25, 90, 22);

button.addActionListener(this);

content.add(button);

button =new JButton("Exit");// Make the exit button

button.setBounds(370, 25, 90, 22);

button.addActionListener(this);

content.add(button);

double sum = 0;

for(int i = 0; i<movieArray.length; i++)

{

sum += movieArray[i].calculateTotal();

}

int temp = (int)sum*100;

sum = temp/100;

JLabel label =new JLabel("Value: $"+sum+"");

label.setForeground(Color.blue);

label.setBounds(160, 230, 300, 30);

content.add(label);

}

publicvoid buildProductPanel(int id)

{

Border border = BorderFactory.createEtchedBorder();

panel.removeAll();

JLabel label =new JLabel("Movie Title: ", JLabel.RIGHT);// Create label

label.setBounds(5, 20, 150, 22);

panel.add(label);

label =new JLabel ("Sku Number: ", JLabel.RIGHT);// Create label

label.setBounds(0, 50, 150, 22);

panel.add(label);

label =new JLabel ("Units in Stock: ", JLabel.RIGHT);// Create label

label.setBounds(0, 80, 150, 22);

panel.add(label);

label =new JLabel ("Item Price: ", JLabel.RIGHT);// Create label

label.setBounds(0, 110, 150, 22);

panel.add(label);

label =new JLabel ("Blu-Ray Disc: ", JLabel.RIGHT);

label.setBounds(0, 140, 150, 22);

panel.add(label);

label =new JLabel (" "+movieArray[id].getName());// Display Name

label.setBorder(border);