[java] NoSuchMethodError

import java.util.*;import java.io.*;public class Logic{		// FileManager	private FileManager filemanager;		// Customers	private List customers;		// Customer	private Customer customer;	private int id;	private long nr;	private String name;		// Account	private int acc;	private int accLimit;	private int accBalance;	private String accType;	private double totalInterest = 0.0;	private String accTransactions;		private Customer[] custs;		/**	* Beskrivning: Initierar klassen	*	* @params void	* @return void	**/	public Logic()	{				this.customers = new ArrayList();		this.filemanager = new FileManager();			}		public void openFile() throws IOException, ClassNotFoundException	{				String filename = this.filemanager.open();		if(filename != "")		{						this.custs = this.filemanager.file(filename).read();					}			}		public void saveFile() throws IOException	{				this.custs = this.convertCustomers();		String filename = this.filemanager.choose();				if(filename != "")		{						this.filemanager.file(filename).write(this.custs);				}			}		public Customer[] convertCustomers()	{				Customer[] custs = new Customer[this.customers.size()];				for(int i = 0; i < this.customers.size(); i++)		{						custs = (Customer) this.customers.get(i);					}				return custs;			}		/**	* Beskrivning: Laddar en kund baserat på id i arrayen	*	* @params int id	* @return void	**/	public void load(int id)	{				this.id = id;		this.customer = (Customer) this.customers.get(id);			}		/**	* Beskrivning: Laddar ett konto baserat på kontonummer	*	* @params int account	* @return void	**/	public void loadAcc(int account)	{				this.acc = account;		this.accType = this.getAccountType();		this.accLimit = this.getAccountLimit();		this.accBalance = this.getAccountBalance();			}		/**	* Beskrivning: Returnerar objektet på den laddade kunden	*	* @params void	* @return (Customer) this.customer	**/	public Customer get()	{				return this.customer;			}		/**	* Beskrivning: Returnerar kontonumret på det laddade kontot	*	* @params void	* @return (int) this.acc	**/	public int getAcc()	{				return this.acc;			}		/**	* Beskrivning: Returnerar id't på den laddade kunden	*	* @params void	* @return (int) this.id	**/	public int id()	{				return this.id;			}		/**	* Beskrivning: Returnerar personnumret på den laddade kunden	*	* @params void	* @return (long) this.nr	**/	public long getNumber()	{				this.nr = this.customer.getCustomerNumber();		return this.nr;			}		/**	* Beskrivning: Returnerar namnet på den laddade kunden	*	* @params void	* @return (String) this.name	**/	public String getName()	{				this.name = this.customer.getCustomerName();		return this.name;			}		/**	* Beskrivning: Returnerar kontotyp på det laddade kontot	*	* @params void	* @return (String) this.accType	**/	public String getAccType()	{				return this.accType;			}		/**	* Beskrivning: Returnerar kontogräns på det laddade kontot	*	* @params void	* @return (int) this.accLimit	**/	public int getAccLimit()	{				return this.accLimit;			}		/**	* Beskrivning: Returnerar kontosaldo på det laddade kontot	*	* @params void	* @return (int) this.accBalance	**/	public int getAccBalance()	{				this.accBalance = this.getAccountBalance();		return this.accBalance;			}		/**	* Beskrivning: Returnerar kontotransaktioner på det laddade kontot	*	* @params void	* @return (String) this.accTransactions	**/	public String getAccTransactions()	{				this.accTransactions = this.getAccountTransactions();		return this.accTransactions;			}		/**	* Beskrivning: Lägger till en kund i systemet	*	* @params (int) number	* @params (String) name	* @return (Boolean) true or false	**/	public Boolean addCustomer(long number, String name)	{				if(name == "" || number == 0)		{						return false;					}				Customer cust;		Iterator iterator = this.customers.iterator();				int invalid = 0;					while(iterator.hasNext())		{							cust = (Customer) iterator.next();			long custNr = cust.getCustomerNumber();			if(custNr == number)			{									invalid = 1;								}						}					if(invalid == 1)		{							return false;						}					Customer person = new Customer(name, number);		this.customers.add(person);				return true;			}		/**	* Beskrivning: Returnerar alla kunder som finns i systemet	*	* @params void	* @return (String) returnValue	**/	public String getCustomers()	{				String returnValue = "";		Customer cust;		Iterator iterator = customers.iterator();		int i = 0;					while(iterator.hasNext())		{							cust = (Customer) iterator.next();			long custNr = cust.getCustomerNumber();			String custName = cust.getCustomerName();						returnValue = returnValue + i + "\t\t" + custName + "\t\t" + custNr + "\n";						i++;						}				return returnValue;			}		/**	* Beskrivning: Kollar om det finns en kund med det specifierade id't	*	* @params (int) ID	* @return (Boolean) true or false	**/	public Boolean isCustomer(int ID)	{				Customer customer = (Customer) this.customers.get(ID);		if(customer instanceof Customer)		{						return true;					}				return false;			}		/**	* Beskrivning: Ändrar namnet på den laddade kunden	*	* @params (String) text	* @return void	**/	public void editCustomer(String text)	{				this.customer.setName(text);			}		/**	* Beskrivning: Returnerar en sträng med alla sparkonton som den laddade kunden har	*	* @params void	* @return (String) append	**/	public String getSavingsAccounts()	{				Map accounts = this.customer.getSavingsAccounts();		SavingsAccount currentAcc;		String append = "";		this.accBalance = 0;				Map.Entry account;    	Iterator allSavingsAccounts = accounts.entrySet().iterator();    	    	while(allSavingsAccounts.hasNext())    	{    		    		account = (Map.Entry) allSavingsAccounts.next();    		currentAcc = (SavingsAccount) account.getValue();    		this.loadAcc(currentAcc.getAccountNumber());    		    		append = append + this.accType + "\t\t" + this.acc + "\t\t" + this.accBalance + "\n";    		    	}    	    	return append;			}		/**	* Beskrivning: Returnerar en sträng med alla kreditkontot som den laddade kunden har	*	* @params void	* @return (String) append	**/	public String getCreditAccounts()	{				Map accounts = this.customer.getCreditAccounts();		CreditAccount currentAcc;		String append = "";		this.accBalance = 0;				Map.Entry account;    	Iterator allCreditAccounts = accounts.entrySet().iterator();    	    	while(allCreditAccounts.hasNext())    	{    		    		account = (Map.Entry) allCreditAccounts.next();    		currentAcc = (CreditAccount) account.getValue();    		this.loadAcc(currentAcc.getAccountNumber());    		    		append = append + this.accType + "\t\t" + this.acc + "\t\t" + this.accBalance + "\n";    		    	}    	    	return append;			}		/**	* Beskrivning: Skapar ett konto åt den laddade kunden baserat på specifierad kontotyp	*	* @params (int) type	* @return (int) number	**/	public int createAccount(int type)	{				int number = this.customer.createNewAccount(type);		return number;			}		/**	* Beskrivning: Returnerar kontotyp på det laddade kontot	*	* @params void	* @return (String) acc.getAccountType()	**/	public String getAccountType()	{				int accType = this.customer.getAccountType(this.acc);		if(accType == 1)		{						SavingsAccount acc = this.customer.getSavingsAccount(this.acc);			return acc.getAccountType();					}				CreditAccount acc = this.customer.getCreditAccount(this.acc);		return acc.getAccountType();			}		/**	* Beskrivning: Returnerar kontosaldo	*	* @params void	* @return (int) acc.getAccountBalance()	**/	public int getAccountBalance()	{				int accType = this.customer.getAccountType(this.acc);		if(accType == 1)		{						SavingsAccount acc = this.customer.getSavingsAccount(this.acc);			return acc.getAccountBalance();					}				CreditAccount acc = this.customer.getCreditAccount(this.acc);		return acc.getAccountBalance();			}		/**	* Beskrivning: Returnerar kontotransaktioner	*	* @params void	* @return (String) transactions	**/	public String getAccountTransactions()	{				String transactions = "";				int accType = this.customer.getAccountType(this.acc);		if(accType == 1)		{						SavingsAccount acc = this.customer.getSavingsAccount(this.acc);			transactions = acc.getLatestTransactions();						return transactions;					}				CreditAccount acc = this.customer.getCreditAccount(this.acc);		transactions = acc.getLatestTransactions();				return transactions;			}		/**	* Beskrivning: Returnerar kontogräns	*	* @params void	* @return (int) acc.getAccountLimit()	**/	public int getAccountLimit()	{				int accType = this.customer.getAccountType(this.acc);		if(accType == 1)		{						SavingsAccount acc = this.customer.getSavingsAccount(this.acc);			return acc.getAccountLimit();					}				CreditAccount acc = this.customer.getCreditAccount(this.acc);		return acc.getAccountLimit();			}		/**	* Beskrivning: Lägger till pengar på det laddade kontot	*	* @params (int) amount	* @return void	**/	public void addMoney(int amount)	{				int accType = this.customer.getAccountType(this.acc);		if(accType == 1)		{						SavingsAccount acc = this.customer.getSavingsAccount(this.acc);			acc.add(amount);					}				else		{						CreditAccount acc = this.customer.getCreditAccount(this.acc);			acc.add(amount);					}				}		/**	* Beskrivning: Tar bort pengar från det laddade kontot	*	* @params (int) amount	* @return void	**/	public void deductMoney(int amount)	{				int accType = this.customer.getAccountType(this.acc);		if(accType == 1)		{						SavingsAccount acc = this.customer.getSavingsAccount(this.acc);			acc.deduct(amount);					}				else		{						CreditAccount acc = this.customer.getCreditAccount(this.acc);			acc.deduct(amount);					}			}		/**	* Beskrivning: Returnerar ett objekt innehållande alla idn på kunder i systemet	*	* @params void	* @return (Object[]) customers	**/	public Object[] getCustomersAsArray()	{				int length = this.customers.size();		Object[] customers = new String[length];				Customer cust;		Iterator it = this.customers.iterator();		int i = 0;				while(it.hasNext())		{						cust = (Customer) it.next();			customers = i + "";						i++;					}				return customers;			}		/**	* Beskrivning: Returnerar ett objekt innehållande kontonummer på alla konton tillhörande den laddade kunden	*	* @params void	* @return (Object[]) accounts	**/	public Object[] getAccountNumbersAsArray()	{				SavingsAccount currentSAccount;		CreditAccount currentCAccount;		int length = this.customer.getCreditAccountsLength() + this.customer.getSavingsAccountsLength();		Object[] accounts = new Integer[length];		int i = 0;				Map sAccounts = this.customer.getSavingsAccounts();		Map cAccounts = this.customer.getCreditAccounts();				Map.Entry account;    	Iterator allSavingsAccounts = sAccounts.entrySet().iterator();    	Iterator allCreditAccounts = cAccounts.entrySet().iterator();    	    	while(allSavingsAccounts.hasNext())    	{    		    		account = (Map.Entry) allSavingsAccounts.next();    		currentSAccount = (SavingsAccount) account.getValue();    		accounts = currentSAccount.getAccountNumber();    		i++;    		    	}    	    	while(allCreditAccounts.hasNext())    	{    		    		account = (Map.Entry) allCreditAccounts.next();    		currentCAccount = (CreditAccount) account.getValue();    		accounts = currentCAccount.getAccountNumber();    		i++;    		    	}    	    	return accounts;			}		/**	* Beskrivning: Kollar om det finns kunder i systemet	*	* @params void	* @return (Boolean) true or false	**/	public Boolean hasCustomers()	{				if(this.customers.size() > 0)		{						return true;					}				return false;			}		/**	* Beskrivning: Kollar om det finns konton på den laddade kunden	*	* @params void	* @return (Boolean) true or false	**/	public Boolean hasAccounts()	{				String cAccounts = this.getCreditAccounts();		String sAccounts = this.getSavingsAccounts();					if(cAccounts != "" || sAccounts != "") return true;				return false;			}		/**	* Beskrivning: Tar bort det laddade kontot från den laddade kunden	* och returnerar räntan	*	* @params void	* @return (double) interest	**/	public double deleteAccount()	{				int type = this.customer.getAccountType(this.acc);		if(type == 1)		{						SavingsAccount acc = this.customer.getSavingsAccount(this.acc);			double interest = acc.prepareDelete();			this.customer.removeAccount(this.acc);			return interest;					}				CreditAccount acc = this.customer.getCreditAccount(this.acc);		double interest = acc.prepareDelete();		this.customer.removeAccount(this.acc);		return interest;			}		/**	* Beskrivning: Tar bort alla konton tillhörande den laddade kunden	*	* @params void	* @return (String) accounts	**/	public String deleteAccounts()	{				SavingsAccount currentSAccount;		CreditAccount currentCAccount;		String accounts = "";		double interest = 0.0;		this.totalInterest = 0.0;				Map sAccounts = new TreeMap(this.customer.getSavingsAccounts());		Map cAccounts = new TreeMap(this.customer.getCreditAccounts());				Map.Entry account;    	Iterator allSavingsAccounts = sAccounts.entrySet().iterator();    	Iterator allCreditAccounts = cAccounts.entrySet().iterator();    	    	while(allSavingsAccounts.hasNext())    	{    		    		account = (Map.Entry) allSavingsAccounts.next();    		currentSAccount = (SavingsAccount) account.getValue();    		interest = currentSAccount.prepareDelete();    		    		if(accounts != "") accounts += ", ";    		    		accounts += currentSAccount.getAccountNumber() + ": " + interest;    		this.totalInterest += interest;    		    		this.customer.removeAccount(currentSAccount.getAccountNumber());    		    	}    	    	while(allCreditAccounts.hasNext())    	{    		    		account = (Map.Entry) allCreditAccounts.next();    		currentCAccount = (CreditAccount) account.getValue();    		interest = currentCAccount.prepareDelete();    		    		if(accounts != "") accounts += ", ";    		    		accounts += currentCAccount.getAccountNumber() + ": " + interest;    		this.totalInterest += interest;    		    		this.customer.removeAccount(currentCAccount.getAccountNumber());    		    	}    	    	return accounts;					}		/**	* Beskrivning: Tar bort den laddade kunden från systemet	*	* @params void	* @return (double) this.totalInterest	**/	public double removeCustomer()	{				this.customers.remove(this.customer);		return this.totalInterest;			}	}

import java.io.*;import javax.swing.*;import javax.swing.filechooser.*;import java.util.*;class FileManager{		private static final String EXT = "bank";	private static final String DESC = "Bank source files";		private String file_name;	private File file_write;	private File file_read;		private FileOutputStream write_stream;	private FileInputStream read_stream;		private ObjectOutputStream write_objectStream;	private ObjectInputStream read_objectStream;		private Customer[] customers_write;	private Customer[] customers_read;		private JFileChooser chooser;		public FileManager()	{				this.chooser = new JFileChooser();		this.chooser.setFileFilter(new BankFilter(EXT, DESC));			}		public String open()	{				int status = this.chooser.showOpenDialog(null);		String name = "";				if(status == JFileChooser.APPROVE_OPTION)		{						File file = this.chooser.getSelectedFile();			name = file.getName();					}				return name;			}		public String choose()	{				int status = this.chooser.showSaveDialog(null);		String filename = "";				if(status == JFileChooser.APPROVE_OPTION)		{						filename = this.chooser.getSelectedFile().getAbsolutePath();					}				return filename;			}		public FileManager file(String file)	{				this.file_name = file;		return this;			}		public Customer[] read() throws IOException, ClassNotFoundException	{				this.file_read = new File(this.file_name);		this.read_stream = new FileInputStream(this.file_read);		this.read_objectStream = new ObjectInputStream(this.read_stream);				this.customers_read = (Customer[]) this.read_objectStream.readObject();		this.read_objectStream.close();				return this.customers_read;			}		public void write(Customer[] customers) throws IOException	{				this.customers_write = customers;				this.file_write = new File(this.file_name);		this.write_stream = new FileOutputStream(this.file_write);		this.write_objectStream = new ObjectOutputStream(this.write_stream);				this.write_objectStream.writeObject(this.customers_write);		this.write_objectStream.close();			}	}

import java.io.File;import javax.swing.*;import javax.swing.filechooser.*;class BankFilter extends FileFilter{		private static final char DOT = '.';		private String Ext;	private String Desc;		public BankFilter(String ext, String desc)	{				this.Ext = ext;		this.Desc = desc;			}		public boolean accept(File f)	{				if(f.isDirectory())		{						return true;					}				if(extension(f).equalsIgnoreCase(this.Ext))		{						return true;					}				else		{						return false;					}			}		public String getDescription()	{				String desc = this.Desc + " (" + DOT + this.Ext + ")";		return desc;			}		private String extension(File f)	{				String filename = f.getName();		int loc = filename.lastIndexOf(DOT);				if(loc > 0 && loc < filename.length() - 1)		{						return filename.substring(loc + 1);					}				else		{						return "";					}			}	}

if(this.logic.hasCustomers())				{										try					{												this.logic.saveFile();											}										catch(IOException e)					{												JOptionPane.showMessageDialog(null, "Something went wrong");											}									}

public void write(Customer[] customers) throws IOException	{				this.customers_write = customers;				this.file_write = new File(this.file_name);		JOptionPane.showMessageDialog(null, "File created");		this.write_stream = new FileOutputStream(this.file_write);		JOptionPane.showMessageDialog(null, "File outputstream created");		this.write_objectStream = new ObjectOutputStream(this.write_stream);		JOptionPane.showMessageDialog(null, "File object outputstream created");				this.write_objectStream.writeObject(this.customers_write);		JOptionPane.showMessageDialog(null, "Write to file suceeded");		this.write_objectStream.close();		JOptionPane.showMessageDialog(null, "File closed");			}

public Customer[] read() throws IOException, ClassNotFoundException	{				this.file_read = new File(this.file_name);		this.read_stream = new FileInputStream(this.file_read);		this.read_objectStream = new ObjectInputStream(this.read_stream);				this.customers_read = (Customer[]) this.read_objectStream.readObject();		this.read_objectStream.close();				return this.customers_read;			}