Account.java

/**
 * This defines a generic {@link Bank} account {@link User}s can own
 * 
 * @author samuel
 *
 */
public class Account {

	// account number
	private Integer accountNumber;
	// name of the account
	private String name;
	// account balance, default is 0
	private Double balance = 0.0;
	// the type of the account
	private AccountType type;
	
	// Default constructor
	public Account() {
		
	}
		
	public Account(Integer accountNumber, String name, Double balance) {
		super();
		this.accountNumber = accountNumber;
		this.name = name;
		this.balance = balance;
	}

	public Integer getAccountNumber() {
		return accountNumber;
	}
	public void setAccountNumber(Integer accountNumber) {
		this.accountNumber = accountNumber;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Double getBalance() {
		return balance;
	}
	public void setBalance(Double balance) {
		this.balance = balance;
	}

	public AccountType getType() {
		return type;
	}

	public void setType(AccountType type) {
		this.type = type;
	}
	
	//////////////////////////////////////////
	// Utility methods can live here
	//////////////////////////////////////////
}

AccountType.java

/**
 * There lots of {@link Account} types a bank can support, this defines those we provide
 * 
 * @author samuel
 */
public enum AccountType {
	/**
	 * This is a savings account, see: https://en.wikipedia.org/wiki/Savings_account
	 */
	SAVINGS,
	/**
	 * These are simple accounts in favor of the none working class
	 */
	STUDENT,
	/**
	 * These are accounts held by the big dogs like: Kuteesa Sam ne Ann
	 */
	CORPORATE
}

helloWorldLikeBankProgramReview.java

import java.util.Scanner;


public class BankApp {
	private String accno;
	private String name;
	private long balance;
	
	Scanner sc = new Scanner(System.in);
	//method to open an account
	void openAccount()
	{
		System.out.print("Enter Account No.");
		accno=sc.next();
		System.out.print("Enter Name:");
		name=sc.next();
		System.out.print("Enter Balance:");
		balance=sc.nextLong();
		
	}
	//method to display account details 
	void showAccount()
	{
		System.out.println(accno+","+name+","+balance);
	}
	//method to deposit
	void deposit()
	{
		long amt;
		System.out.println("Enter Amount You Would like to deposit");
		amt = sc.nextLong();
	}
 //method to withdraw
	void withdraw()
	{
		long amt;
		System.out.println("Enter amount you would like to withdarw");
		amt = sc.nextLong();
		if(balance>=amt)
		{
			balance = balance-amt;
		}
	}
		{
			System.out.print("less Balance. Transation failed!!!");
			
		}
		
		//method to search for account 
		boolean search(String acn)
		{
			if(accno.equals(acn))
			{
				showAccount();
				return(true);
			}
			return(false);
		}
	
		
		
	}
	
	class ExBank
	{
	private static final String C = null;
	public static void main(String[] args){
		
		Scanner sc = new Scanner(System.in);
		// create initial accounts
		System.out.print("How many customer you want to input:");
		int n = sc.nextInt();
		Bank C[]= new Bank[n];
		for(int i =0; i<C.length;i++)
		{
			C[i]=new Bank();
			C[i].openAccount();
		}
	}
		//...........................................
		int ch;
		{
		do{
			System.out.println("Main Menu\n"
					+ "1.Display All\n "
					+ "2.Search By Account\n "
					+ "3.Deposit\n"
					+ "4.Withdrawal\n 5.Exit");
			
			System.out.println("Ur Choice");
			ch = sc.nextInt();
			switch(ch)
			{
			case 1: 
				for(int i =0; i<C.length();i++)
				{
					C[i].showAccount();
				}
	          break;
	          
			case 2:
				System.out.print("Enter Account no you want to search...:");
				String acn = sc.next();
				boolean found=false;
				for(int i=0;i<C.length;i++)
				{
					found=C[i].search(acn);
					if (!found)
					{
						System.out.println("Search failed Account dosent exist....:");	
					}break;
				}
					
					case 3:
						System.out.print("Enter Account No :");
						acn=sc.next();
						found= false;
						for(int i=0; i<C.lenght; i++)
						{
							found = C[i].search(acn);
							if(found)
							{
								C[i].deposit();
										break;
							   }
							}
							if (!found)
							{System.out.println("Search failed Account dosent exist....:");							
							}
							break;
							
							
							case 4:System.out.print("Enter Account No :");
							acn=sc.next();
							found =false;
							for(int i=0; i<C.length; i++)
							{found=C[i].search(acn);
							   if(found) {
								   C[i].withdrawal();
								   break;
							   }
							   if (!found)
							   {
								   System.out.print("Search failled,account not exsit");
							   }
							   break;
							}
							   
							   
							   case 5:
								   System.out.println("Good Bye.......");
								   break;
								   
							   
							}
							
							
							}
						while(ch!=5);
	

	}

}