exception in thread 2

is there something Im missing here to get excption in thread? these 2 programs have the same prob..
prog1:import java.util.*;
public class AuditedCard extends CreditCard implements CardInterface {
  protected Vector transacts; // to keep transactions

      private String num;
      private String name;
      private String bank;
      private double balance;
      private int limit;
      private String type;
      private double amount;
      ArrayList transList;
      
      
      public AuditedCard(String numb1, String name1, String bank1, double balance1, int limit1) {
            super (numb1,name1,bank1,balance1,limit1);
            
            num = numb1;
            name = name1;
            bank = bank1;
            balance = balance1;
            limit = limit1;                  
            
            transList = new ArrayList();
                                          
      }
      public boolean chargeIt(double price) {       // Make a charge
    if (price + balance > (double) limit)
      return false;      // Not enough money left to charge it
    balance += price;
    return true;      // The charge is accepted
   
  }
      public void recordTrans(String ty, double amt){
      
      }
      
      public double getBalance(){
            return balance;
      }
            
      
      public void print(){
      //printing all e results
          
      }
}
      
prog 2:public interface CardInterface {
 
  // Accessor methods
  public String getNumber();
  public String getName();
  public String getBank();
  public double getBalance();
  public int getLimit();
 
  // Action methods
  public boolean chargeIt(double price);
  public void makePayment(double payment);
  public void print();
}