Null Pointer exception

import java.util.*;
 import java.awt.*; 
import java.awt.event.*;
 import javax.swing.*;
 import java.sql.*;  

 class ToysR extends JFrame implements ActionListener { 	private Connection connection; 	
private Statement statement; 	
private ResultSet rs; 	
JTextField AddName = new JTextField(20); 	
JTextField AddPrice = new JTextField(20); 	
JTextField AddQuantity = new JTextField(20); 	
JTextField SearchField = new JTextField(20); 	
JLabel page1lbl = new JLabel("Toy Store inventory System"); 	JLabel searchtoplbl = new JLabel("Search For Items"); 	JLabel searchtitle = new JLabel("Type in what you would like to search for"); 	
JLabel addtitle = new JLabel("This is where you can add items to your inventory"); 	
JLabel MainMenu = new JLabel("1. Search Items in Inventory 2. Add Items to Inventory 3. List all items in inventory"); 	JLabel addName = new JLabel("Add Name"); 	
JLabel addPrice = new JLabel("Add Price"); 	
JLabel addQuantity = new JLabel("Add Quantity"); 	
JButton gotoSearchItem = new JButton("Search Items"); 	JButton gotoAddItem = new JButton("Add Items"); 	
JButton gotoListAll = new JButton("ListAll"); 	
JButton AddItem = new JButton("Add"); 	
JButton ListItem = new JButton("List"); 	
JButton FindItem = new JButton("Find"); 	
JButton gotoMain = new JButton("Return to Main"); 	
JButton gotoMain2 = new JButton("Return to Main"); 	
JPanel MainTop = new JPanel(new GridLayout(5, 1)); 	
JPanel Main2nd = new JPanel(new GridLayout(3,1)); 	
JPanel Main3rd = new JPanel(new GridLayout(1,3)); 	
JPanel Main4th = new JPanel(new GridLayout(1,1)); 	
JPanel SearchTitle = new JPanel(new GridLayout(1,1)); 	JPanel SearchTop = new JPanel(new GridLayout(1,1)); 	JPanel Searchmiddle = new JPanel(new GridLayout(1,1)); 	JPanel Searchbottom = new JPanel(new GridLayout(1,1)); 	JPanel addTitle = new JPanel(new GridLayout(1,1)); 	
JPanel addTop = new JPanel(new GridLayout(2,3)); 	
JPanel addMiddle = new JPanel(new GridLayout(1,1)); 	JPanel addBottom = new JPanel(new GridLayout(1,1)); 	
JList listeverything = new JList(); 	
private ImageIcon toysIcon = new ImageIcon("toysrus-logo-high.jpg"); 	
ToysR ToysR2; 	
JFrame searchFrame = new JFrame(); 	
JFrame mainFrame = new JFrame(); 	
JFrame addFrame = new JFrame(); 	
JFrame listAllFrame = new JFrame(); 	 	   

private void loaditems() {     
Vector v = new Vector();    
 try {       rs = statement.executeQuery("SELECT * FROM items");       
 while (rs.next()) {         v.addElement(rs.getString("name"));       }     } 
catch (SQLException e) {       //displaySQLErrors(e);     }     listeverything.setListData(v);   }    
public void actionPerformed(ActionEvent evt)  // function to control the ActionListener         {         Object src = evt.getSource();        
 if(src == gotoSearchItem)         { 			mainFrame.setVisible(false); 			searchFrame.setVisible(true); 	        searchFrame.show(); 			} 		
if (src == gotoMain || src == gotoMain2) 		{ 			mainFrame.setVisible(true); 			searchFrame.setVisible(false); 			addFrame.setVisible(false); 	        
mainFrame.show(); 		} 		
if (src == gotoAddItem) 		{ 			mainFrame.setVisible(false); 			addFrame.setVisible(true); 			addFrame.show(); 		} 		
if (src == gotoListAll) 		{ 			mainFrame.setVisible(false); 			listAllFrame.setVisible(true); 			listAllFrame.show(); 			   
try {           Statement statement = connection.createStatement();           rs = statement.executeQuery("SELECT * FROM student"); 				} 
catch (SQLException insertException) {           System.out.println(insertException);         } 		System.out.println(rs); 		} 		 		
if (src == AddItem) 		{ 			
this.AddPrice = new JTextField(20); 			 
try { 			 Statement statement = connection.createStatement(); 			  
int i = statement.executeUpdate("INSERT INTO items (name, price, quantity)" 				+ "VALUES("  					  +"'"+ AddName.getText()  + "', " 					  +"'"+ AddPrice.getText()  + "', " 					  +"'"+ AddQuantity.getText()  + "')"); 		 System.out.print("\nInserted " + i + " rows successfully");           
listeverything.removeAll();           
loaditems(); 				} 					 
catch (SQLException insertException)  						  { 			  System.out.println(insertException); 			} 		} 		 		} 	
public void ConnectToTheDatabase() 	{ 		
try {       connection = DriverManager           .getConnection("jdbc:mysql://localhost/toysr","","");       statement = connection.createStatement();      } catch (SQLException connectException) {       System.out.println(connectException.getMessage());         System.out.println(connectException.getSQLState())  ;       System.out.println(connectException.getErrorCode()  );       System.exit(1);     } 	 	} 	   	
ToysR() 	{ 		
try {       Class.forName("com.mysql.jdbc.Driver").newInstance();     } catch (Exception e) {       System.err.println("Unable to find and load driver");       
System.exit(1);     } 	
mainFrame.setLayout(new FlowLayout()); 	mainFrame.setSize(550,500); 	mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_  CLOSE); 	gotoSearchItem.addActionListener(this); 	MainTop.add(page1lbl); 	
Main2nd.add(MainMenu); 	
Main3rd.add(gotoSearchItem); 	
Main3rd.add(gotoAddItem); 	
Main3rd.add(gotoListAll); 	
Main4th.add(new JLabel(toysIcon)); 	mainFrame.add(MainTop); 	
mainFrame.add(Main2nd); 	
mainFrame.add(Main3rd); 	
mainFrame.add(Main4th); 	
mainFrame.setVisible(true); 	
searchFrame.setSize(350,250); 	
searchFrame.setLayout(new FlowLayout()); 	searchFrame.setDefaultCloseOperation(JFrame.EXIT_O  N_CLOSE); 	gotoMain.addActionListener(this); 	gotoMain2.addActionListener(this); 
SearchTitle.add(searchtitle); 	
SearchTop.add(searchtoplbl); 	Searchmiddle.add(SearchField); 	Searchbottom.add(FindItem); 	Searchbottom.add(gotoMain); 	searchFrame.add(SearchTitle); 	searchFrame.add(SearchTop); 	searchFrame.add(Searchmiddle); 	searchFrame.add(Searchbottom); 	
addFrame.setVisible(false); 	
addFrame.setSize(800,200); 	
addFrame.setLayout(new FlowLayout()); 	addFrame.setDefaultCloseOperation(JFrame.EXIT_ON_C  LOSE); 	gotoAddItem.addActionListener(this); 	 	addTitle.add(addtitle); 	
addTop.add(addName); 	
addTop.add(addPrice); 	
addTop.add(addQuantity); 	
addTop.add(AddName); 	
addTop.add(AddPrice); 
addTop.add(AddQuantity); 	
addMiddle.add(AddItem); 	
addBottom.add(gotoMain2); 	
addFrame.add(addTitle); 	
addFrame.add(addTop); 	
addFrame.add(addMiddle); 	
addFrame.add(addBottom); 	
AddItem.addActionListener(this);  	
listAllFrame.setVisible(false); 
listAllFrame.setSize(400,300); 	
listAllFrame.setLayout(new FlowLayout()); 	listAllFrame.setDefaultCloseOperation(JFrame.EXIT_  ON_CLOSE); 	gotoListAll.addActionListener(this); 	} 	 	
public static void main(String[] args)  	
{ 		ToysR x1 = new ToysR(); 		x1.mainFrame.show(); 	 	} }