bank

Class TransactionListCons

java.lang.Object

bank.TransactionList

bank.TransactionListCons

public class TransactionListCons
extends TransactionList

Class for representing non-empty lists of transactions.

Field Summary

Fields inherited from class bank.TransactionList

EMPTY_LIST

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TransactionListCons(Transaction data, TransactionList next) Use the method TransactionList.prepend for creating non-empty lists

Method Summary

Methods

Modifier and Type	Method and Description
Transaction	head()
boolean	isEmpty()
int	length()
TransactionList	tail()

Methods inherited from class bank.TransactionList

prepend

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TransactionListCons

protected TransactionListCons(Transaction data,
                   TransactionList next)

Use the method TransactionList.prepend for creating non-empty lists

Method Detail

head

public Transaction head()

Specified by:

head in class TransactionList

Returns:

the first element of this list, or null iff this list is empty

tail

public TransactionList tail()

Specified by:

tail in class TransactionList

Returns:

the tail (the list without its first element) of this list, or null iff this list is empty

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in class TransactionList

Returns:

true iff this list is empty

length

public int length()

Specified by:

length in class TransactionList

Returns:

the length of this list