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กระทู้ #1873 [Java] (จาก IP: 125.26.182.171)
ขอโค๊ดของ Singly Linked List หน่อยคับ
ขอบคุนคับ
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| จากคุณ
:
mizuno / mizuno_tatsuya@hotmail.com [2008-03-08 03:49:03]
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ความคิดเห็น #26608 (จาก IP: 202.91.19.192)
public class LinkedList
{
// reference to the head node.
private Node head;
private int listCount;
// LinkedList constructor
public LinkedList()
{
// this is an empty list, so the reference to the head node
// is set to a new node with no data
head = new Node(null);
listCount = 0;
}
public void add(Object data)
// post: appends the specified element to the end of this list.
{
Node temp = new Node(data);
Node current = head;
// starting at the head node, crawl to the end of the list
while(current.getNext() != null)
{
current = current.getNext();
}
// the last node's "next" reference set to our new node
current.setNext(temp);
listCount++;// increment the number of elements variable
}
public void add(Object data, int index)
// post: inserts the specified element at the specified position in this list.
{
Node temp = new Node(data);
Node current = head;
// crawl to the requested index or the last element in the list,
// whichever comes first
for(int i = 1; i < index && current.getNext() != null; i++)
{
current = current.getNext();
}
// set the new node's next-node reference to this node's next-node reference
temp.setNext(current.getNext());
// now set this node's next-node reference to the new node
current.setNext(temp);
listCount++;// increment the number of elements variable
}
public Object get(int index)
// post: returns the element at the specified position in this list.
{
// index must be 1 or higher
if(index <= 0)
return null;
Node current = head.getNext();
for(int i = 1; i < index; i++)
{
if(current.getNext() == null)
return null;
current = current.getNext();
}
return current.getData();
}
public boolean remove(int index)
// post: removes the element at the specified position in this list.
{
// if the index is out of range, exit
if(index < 1 || index > size())
return false;
Node current = head;
for(int i = 1; i < index; i++)
{
if(current.getNext() == null)
return false;
current = current.getNext();
}
current.setNext(current.getNext().getNext());
listCount--; // decrement the number of elements variable
return true;
}
public int size()
// post: returns the number of elements in this list.
{
return listCount;
}
public String toString()
{
Node current = head.getNext();
String output = "";
while(current != null)
{
output += "[" + current.getData().toString() + "]";
current = current.getNext();
}
return output;
}
private class Node
{
// reference to the next node in the chain,
// or null if there isn't one.
Node next;
// data carried by this node.
// could be of any type you need.
Object data;
// Node constructor
public Node(Object _data)
{
next = null;
data = _data;
}
// another Node constructor if we want to
// specify the node to point to.
public Node(Object _data, Node _next)
{
next = _next;
data = _data;
}
// these methods should be self-explanatory
public Object getData()
{
return data;
}
public void setData(Object _data)
{
data = _data;
}
public Node getNext()
{
return next;
}
public void setNext(Node _next)
{
next = _next;
}
}
} |
| จากคุณ
:
sup98 [2008-03-09 17:20:04]
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