public class Bank { private Account[] accounts = new Account[100]; private int s

Question

public class Bank {
private Account[] accounts = new Account[100];
private int size;
private int capacity;
  
private static final int SAVINGS = 0;
private static final int CHECKING = 1;   
private static final int SENIOR = 0;
private static final int ADULT = 1;   
private static final int STUDENT = 2;
private static final int INIT_CAPACITY = 100;
  
/** Creates a new instance of Bank */
public Bank() ;

  
/********************************************************************
* Creates a new account.
* pre: customer information must be not null and types must be valid
* post: New account added to bank
* @param customerName String Account owner's name
* @param customerAddress String Owner's address
* @param customerAge int Owner's age (in years)
* @param customerPhoneNumber String Owner's phone number
* @param customerType int Owner's type of customer within bank
* @param typeAccount int Account type (savings or checking)
* @return String New account number
*/
public String addAccount(String customerName, String customerAddress,
int customerAge, String customerPhoneNumber,
int customerType, int typeAccount);
  
/***********************************************************************
* Make a deposit into account.
* pre: amount must be a positive integer
* post: Account's balance increases
* @param accountNumber String Account's number
* @param amount double Amount to deposit
* @return double New balance
*/
public String makeDeposit(String accountNumber, double amount);
  
/***********************************************************************
* Make a withdrawal from account.
* pre: amount must be a positive integer
* post: Account's balance decreases
* @param accountNumber String Account's number
* @param amount double Amount to withdraw
* @return double New balance
*/   
public String makeWithdrawal(String accountNumber, double amount){
int index = find(accountNumber);
accounts[index].withdrawal(amount);
return Double.toString(accounts[index].getBalance());
}

/***********************************************************************
* Returns account information as a string so it can be displayed
* @param accountNumber String Account's number
* @return String Account information as a String object
*/   
public String getAccount(String accountNumber);
  
/***********************************************************************
* Given an account number tells if the account exists or not
* @param accountNumber String Account's number
* @return int TRUE if accountNumber exists in accounts[]. Otherwise, -1.
*/   
private int find(String accountNumber);

/***********************************************************************

/** You need to create private method : Allocate to allocate a new array to hold the transactions. */
private void reallocate(); {
if(account[99]==null){
System.out.println("Not Full");
}
else
account=new Account[account.length*2];
}
}

Explanation / Answer

public class Bank {
private Account[] accounts = new Account[100];
private int size;
private int capacity;

private static final int SAVINGS = 0;
private static final int CHECKING = 1;  
private static final int SENIOR = 0;
private static final int ADULT = 1;  
private static final int STUDENT = 2;
private static final int INIT_CAPACITY = 100;

/** Creates a new instance of Bank */
public Bank() ;

/********************************************************************
* Creates a new account.
* pre: customer information must be not null and types must be valid
* post: New account added to bank
* @param customerName String Account owner's name
* @param customerAddress String Owner's address
* @param customerAge int Owner's age (in years)
* @param customerPhoneNumber String Owner's phone number
* @param customerType int Owner's type of customer within bank
* @param typeAccount int Account type (savings or checking)
* @return String New account number
*/
public String addAccount(String customerName, String customerAddress,
int customerAge, String customerPhoneNumber,
int customerType, int typeAccount){
     if (size >= 100){
        reallocate();
     accounts[size] = new Account(customerName,customerAddress,customerAge,customerPhoneNumber,customerType, typeAccount)
     String accountNumber = accounts[size].getAccountNumber();
     size++;
     return accountNumber;
}

/***********************************************************************
* Make a deposit into account.
* pre: amount must be a positive integer
* post: Account's balance increases
* @param accountNumber String Account's number
* @param amount double Amount to deposit
* @return double New balance
*/
public String makeDeposit(String accountNumber, double amount){

    int index = find(accountNumber);
    if (index != -1){
       accounts[index].deposit(amount);  
       return Double.toString(accounts[index].getBalance());
    }
    else {
       System.out.println("Account not found");
    }
    return "";
}

/***********************************************************************
* Make a withdrawal from account.
* pre: amount must be a positive integer
* post: Account's balance decreases
* @param accountNumber String Account's number
* @param amount double Amount to withdraw
* @return double New balance
*/  
public String makeWithdrawal(String accountNumber, double amount){
    int index = find(accountNumber);
    if (index != -1){
       accounts[index].withdrawl(amount);  
       return Double.toString(accounts[index].getBalance());
    }
    else {
       System.out.println("Account not found");
    }
    return "";
}
/***********************************************************************
* Returns account information as a string so it can be displayed
* @param accountNumber String Account's number
* @return String Account information as a String object
*/  
public String getAccount(String accountNumber){
    int index = find(accountNumber);
    if (index != -1){
       return accounts[index].toString();
    }
    else {
       System.out.println("Account not found");
    }
    return "";   
}

/***********************************************************************
* Given an account number tells if the account exists or not
* @param accountNumber String Account's number
* @return int TRUE if accountNumber exists in accounts[]. Otherwise, -1.
*/  
private int find(String accountNumber){

    for(int i = 0; i<size; i++){
        if (accounts[i].getAccountNumber().equals(accountNumber))
            return i;
    }
    return -1;
}

/***********************************************************************

/** You need to create private method : Allocate to allocate a new array to hold the transactions. */
private void reallocate(); {
if(account[99]==null){
System.out.println("Not Full");
}
else
account=new Account[account.length*2];
}
}

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