Created
December 21, 2013 21:27
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A Cons List in Java as an alternative to the ArrayList already found
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public class ConsList<T extends Comparable<T>> { | |
private T _head; | |
private ConsList<T> _tail; | |
public ConsList(T head, ConsList<T> tail) { | |
_head = head; | |
_tail = tail; | |
} | |
public static <T extends Comparable<T>> ConsList<T> CreateList(T... items) { | |
int max = items.length -1; | |
ConsList<T> resultList = null; | |
for(int i = max; i > -1; i--) { | |
if(i == max) | |
resultList = new ConsList<T>(items[i], null); | |
else | |
resultList = resultList.add(items[i]); | |
} | |
return resultList; | |
} | |
public T getHead() { | |
return _head; | |
} | |
public ConsList<T> getTail() { | |
return _tail; | |
} | |
public boolean isTailEmpty() { | |
if(_tail == null) | |
return true; | |
else return _tail.isEmpty(); | |
} | |
public boolean isEmpty() { | |
if(_head == null && (_tail == null || _tail.isEmpty())) return true; | |
else return false; | |
} | |
public ConsList<T> add(T item) { | |
return new ConsList<T>(item, this); | |
} | |
@Override | |
public String toString() { | |
if(_tail != null) | |
return _head.toString() + ", " + _tail.toString(); | |
else | |
return _head.toString() + ""; | |
} | |
} |
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