New to Java

public class Bank{
		public static OrderedCollection accounts = new OrderedCollection(1000);
			
		public static void addAccounts(Account lov){
				accounts.add(lov);
		}
		
				
		public static void removeAccounts(Account lov ){
				accounts.remove(lov);
		}
		
		public static void getAccount(Account lov ){
				accounts.get(lov);
		}
		
		public static String accounts(){
			return accounts.toString();
		}
}//end bank class

	
	
	public class SavingAccount extends Account{
	private String fname;
	private String lname;
		
	public SavingAccount(long accNumber, String fn, String ln, double balance){
		super(accNumber, balance);
		fname		= fn;
		lname		= ln;
	
	}
	
	public SavingAccount(long accNumber){
		super(accNumber);
	}	
		
		
	public void setFirstName(String fn){	fname	= fn;}
	public void setLastName(String ln){lname		= ln;}
		
			
	public String getFirstName(){	return fname ;}
	public String getLastName(){	return lname;}

	
}//end saving account

public class CheckingAccount extends Account{

	private String fname;
	private String lname;
	
	public CheckingAccount(long accNum,  String fn, String ln, double balance){
		
		super(accNum, balance);
			
		fname		= fn;
		lname		= ln;
	
	}
	
	public CheckingAccount(long accNumber){
		super(accNumber);
	}	
	
	
	public void setFirstName(String fn){	fname	= fn;	}
	public void setLastName(String ln){lname		= ln;	}
	
	
	public String getFirstName(){	return fname ;}
	public String getLastName(){	return lname;}
	
	
}//end saving account
import java.text.DecimalFormat;

//public class Account
public abstract class Account implements Comparable

{
	//class Variables
	private static int NumAccounts = 0;
	private static final double Interest = 0.05;
	
	//Instant Variables
	protected long accountNumber;
	protected double balance;
	
	DecimalFormat x = new DecimalFormat( "$00,000.00" );//Format Balance
	
	public Account( long accN, double bal ){//Constructor
		accountNumber  = accN;
		balance = bal;
		NumAccounts++;
	}
	
	public Account(long acc){
		this(acc, 0.00);
		
		//accountNumber = acc;
	}
	

	public static int GetNumAccounts(){
		return NumAccounts;
	}
	
	public double getBalance(){
		return balance;
	}
	
	public long getAccountNum(){
		return accountNumber;
	}
	
	public void debit( double amount ){
		if(balance >= amount){
		   balance -= amount;	
		}
	}
	public static void setNumAccounts(){//deincrement accounts
	    NumAccounts--;
   }
	
	public void credit( double amount ){
		balance += amount;
	}
	

	public boolean equals(Object obj) {
		if(!(obj instanceof Account)) return false;
			Account acc = (Account) obj;
			return accountNumber.equals(acc.accountNumber);//long cannot be dereferenced
}

	public int hashCode() {
		return accountNumber.hashCode();long cannot be dereferenced//long cannot be dereferenced
	}

	public int compareTo (Object obj) {
		Account acc = (Account) obj;
	return accountNumber.compareTo(acc.accountNumber);//long cannot be dereferenced
	}

		
	public String toString(){
		String Str;
		
		Str ="Account Number   :" + accountNumber + "\n"+
			 "Account Balance  :" + x.format( balance ) + "\n";
		return Str;
	}
	
	
	
}//End of abstract class Account

import java.io.*;
import java.util.*;

public class BankApp{
	public static void main(String[] args)throws IOException{
		Scanner input = new Scanner(new FileReader("bank.txt"));
		
			
		while(input.hasNext()){
				
				String line = input.next();
				
		    if(line.equals("ADD"))
		    	{
					String type = input.next();
			
				if(type.equals("CA")){
						//create checking account
						Bank.addAccounts(new CheckingAccount(input.nextLong(), input.next(), input.next(), input.nextDouble()));		
						
					
			}else{
				   	//create a savings account
				   		Bank.addAccounts(new SavingAccount(input.nextLong(),input.next(), input.next(),input.nextDouble()));
				   	
			}
					//remove an account from the collection
			}else if(line.equals("DEL")){
				    long p = input.nextLong();
				    
				    
				    
					Bank.removeAccounts(new SavingAccount(p));
				
				
				//get an account from the collection
			}else if(line.equals("GET")){
				String ty = input.next();
				
				if(ty.equals("SA")){
					long x = input.nextLong();
				     Bank.getAccount(new SavingAccount(x));
				}else{
					long y = input.nextLong();
					Bank.getAccount(new CheckingAccount(y));
				}
				   	   
				 			
				//print the collection
			}else if(line.equals("PRN")){
				
				System.out.println("I am printing");
			}	

		}//end while
	
	}//end main
}//end class

Every thing is working ok except when I compile I am getting a "long cannot be defferened error." as indicated in the Account class. I am coverting the long accNumber to and object and then compate it to another object but it is not working out. How could I rectify this?