Logical Error, can't figure it out, please help

Question

This is a bank application which has 3 classes: Bank, BankApp, and BankAccount. Everything works fine except for when I want to print out the last N transactions. It only prints out the last transaction, so for example if 3 transactions were made and I want to print out the last 2, it only prints out the 3rd or last one. Here are the 3 classes
Basically, BankApp holds the main method and when the user wants to see the last N transactions, it calls printTransactionInfo which in turn calls getTransactionInfo. Thanks for the help
package support;
public class BankAccount {
     private static int accountNumber = -1;
     private String customerName;
     private double balance = 0.0f;
     private double[] transactions = new double[1000];
     private int transactionCount = 0;
     public BankAccount(String customername, double openingbalance)
          customerName = customername;
          balance = openingbalance;
          accountNumber++;
     public int getAccountNumber()
          return accountNumber;
     public String getAccountInfo()
          return "Account number: " + accountNumber + "\n" + "Customer name: " + customerName + "\n" + "Balance: " + balance + "\n";
     public String getTransactionInfo(int lastNTransactions)
                    String transInfo = new String();
                    while(transactionCount > lastNTransactions)
                         transInfo = transactions[lastNTransactions++] + "\n";
                    return transInfo;
     public void withdraw(double amount)
          if(amount > balance)
               System.out.println("The withdrawal amount exceeds the balance\n");
          else
                    balance = balance - amount;
                    transactions[transactionCount] = -1 * amount;
                    transactionCount++;
     public void deposit(double amount)
          balance = balance + amount;
          transactions[transactionCount] = amount;
          transactionCount++;
package main;
import support.BankAccount;
public class Bank {
     private BankAccount[] accounts;
     private static int accountCount = 0;
     public Bank(int accountCapacity)
          accounts = new BankAccount[25];
     public int openNewAccount(String customerName, double openingBalance)
          BankAccount baccount = new BankAccount(customerName,openingBalance);
          int accNum = baccount.getAccountNumber();
          accounts[accountCount++] = baccount;
          return accNum;
     public void withdrawFrom(int accountNum, double amount)
          int accNum;
          accNum = findAccount(accountNum);
          if(accNum == -1)
               System.out.println("Account number does not exist\n");
          else
               accounts[accountNum].withdraw(amount);
     public void depositTo(int accountNum, double amount)
          int accNum;
          accNum = findAccount(accountNum);
          if(accNum == -1)
               System.out.println("Account number does not exist\n");
          else
               accounts[accountNum].deposit(amount);
     public void printAccountInfo(int accountNum)
          int accNum;
          accNum = findAccount(accountNum);
          if(accNum == -1)
               System.out.println("Account number does not exist\n");
          else
               System.out.println(accounts[accNum].getAccountInfo());
     public void printAccountInfo(int accountNum, int lastNTransactions)
          int accNum;
          accNum = findAccount(accountNum);
          if(accNum == -1)
               System.out.println("Account number does not exist\n");
          else
               System.out.println(accounts[accountNum].getAccountInfo());
               System.out.println(accounts[accountNum].getTransactionInfo(lastNTransactions));
     public int findAccount(int accountNum)
          int i;
          for(i = 0; i < accountCount; i++)
               if(accounts[i] == accounts[accountNum])
                    return i;
               return -1;
package mystuff;
import java.io.*;
import main.Bank;
public class BankApp {
     public static void main(String args[]) throws IOException
          Bank b = new Bank(25);
          int menuChoice = 0;
          int accNum;
          String name = new String();
          double bal;
          double amt;
          int trans;
          BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
          while(menuChoice!=6)
          System.out.println("1)open a new bank account");
          System.out.println("2)deposit to a bank account");
          System.out.println("3)withdraw from a bank account");
          System.out.println("4)print short account info");
          System.out.println("5)print detailed account info including last transactions");
          System.out.println("6)quit");
               menuChoice = Integer.parseInt(keyboard.readLine());
               switch(menuChoice)
               case 1:
               System.out.println("What is the name");
               name = keyboard.readLine();
               System.out.println("What is the opening balance");
               bal = Double.parseDouble(keyboard.readLine());
               b.openNewAccount(name,bal);
               break;
               case 2:
               System.out.println("What is the account number");
               accNum = Integer.parseInt(keyboard.readLine());
               System.out.println("What is the deposit amount");
               amt = Double.parseDouble(keyboard.readLine());
               b.depositTo(accNum,amt);
               break;
               case 3:
               System.out.println("What is the account number");
               accNum = Integer.parseInt(keyboard.readLine());
               System.out.println("What is the withdrawal amount");
               amt = Double.parseDouble(keyboard.readLine());
               b.withdrawFrom(accNum,amt);
               break;
               case 4:
               System.out.println("What is the account number");
               accNum = Integer.parseInt(keyboard.readLine());
               b.printAccountInfo(accNum);
               break;
               case 5:
               System.out.println("What is the account number");
               accNum = Integer.parseInt(keyboard.readLine());
               System.out.println("How many Transactions");
               trans = Integer.parseInt(keyboard.readLine());
               b.printAccountInfo(accNum,trans);
               break;
               case 6:
               System.exit(0);
}

Answer 1

public String getTransactionInfo(int lastNTransactions)
String transInfo = new String();
while(transactionCount > lastNTransactions)
transInfo = transactions[lastNTransactions++] + "\n";
return transInfo;You will not get more than one transaction because in
transInfo = transactions[lastNTransactions++] + "\n";
transinfo is replaced with a new value every time instead of values getting added to it.
By the way the routine will not do what you want it to do anyway, but for a different reason,
but you will see that when you corrected the first error.
regards
SH