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ArrayStack&Queue.java
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221 lines (202 loc) · 5.39 KB
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*****************************************************
http://www.theparticle.com/javadata2.html
*****************************************************
public class pArrayStackInt{
protected int head[];
protected int pointer;
public pArrayStackInt(int capacity){
head = new int[capacity];
pointer = -1;
}
public boolean isEmpty(){
return pointer == -1;
}
public void push(int i){
if(pointer+1 < head.length)
head[++pointer] = i;
}
public int pop(){
if(isEmpty())
return 0;
return head[pointer--];
}
}
========================Object===========================
public class pArrayStackObject{
protected Object head[];
protected int pointer;
public pArrayStackObject(int capacity){
head = new Object[capacity];
pointer = -1;
}
public boolean isEmpty(){
return pointer == -1;
}
public void push(Object i){
if(pointer+1 < head.length)
head[++pointer] = i;
}
public Object pop(){
if(isEmpty())
return null;
return head[pointer--];
}
}
======================================
================Queue================
public class pArrayQueue{
protected Object[] array;
protected int start,end;
protected boolean full;
public pArrayQueue(int maxsize){
array = new Object[maxsize];
start = end = 0;
full = false;
}
public boolean isEmpty(){
return ((start == end) && !full);
}
public void insert(Object o){
if(!full)
array[start = (++start % array.length)] = o;
if(start == end)
full = true;
}
public Object remove(){
if(full)
full = false;
else if(isEmpty())
return null;
return array[end = (++end % array.length)];
}
}
==================================ArrayList============================
public class pArrayList{
protected Object[] array;
protected int start,end,number;
public pArrayList(int maxsize){
array = new Object[maxsize];
start = end = number = 0;
}
public boolean isEmpty(){
return number == 0;
}
public boolean isFull(){
return number >= array.length;
}
public int size(){
return number;
}
public void insert(Object o){
if(number < array.length){
array[start = (++start % array.length)] = o;
number++;
}
}
public void insertEnd(Object o){
if(number < array.length){
array[end] = o;
end = (--end + array.length) % array.length;
number++;
}
}
public Object remove(){
if(isEmpty())
return null;
number--;
int i = start;
start = (--start + array.length) % array.length;
return array[i];
}
public Object removeEnd(){
if(isEmpty())
return null;
number--;
return array[end = (++end % array.length)];
}
public Object peek(int n){
if(n >= number)
return null;
return array[(end + 1 + n) % array.length];
}
}
=============================Vector==============================
class pVectorTest{
public static void main(String[] args){
Vector v = new Vector(15);
Integer j = null;
int i;
System.out.println("starting...");
for(i=0;i<10;i++){
j = new Integer((int)(Math.random() * 100));
v.addElement(j);
System.out.println("addElement: " + j);
}
System.out.println("size: "+v.size());
System.out.println("capacity: "+v.capacity());
Enumeration enum = v.elements();
while(enum.hasMoreElements())
System.out.println("enum: "+(Integer)enum.nextElement());
System.out.println("Done ;-)");
}
}
=======================LinkedList=========================
import pOneChildNode;
public class pLinkedList{
protected pOneChildNode head;
protected int number;
public pLinkedList(){
head = null;
number = 0;
}
public boolean isEmpty(){
return head == null;
}
public int size(){
return number;
}
public void insert(Object obj){
head = new pOneChildNode(obj,head);
number++;
}
public Object remove(){
if(isEmpty())
return null;
pOneChildNode tmp = head;
head = tmp.getNext();
number--;
return tmp.getData();
}
public void insertEnd(Object obj){
if(isEmpty())
insert(obj);
else{
pOneChildNode t = head;
while(t.getNext() != null)
t=t.getNext();
pOneChildNode tmp =
new pOneChildNode(obj,t.getNext());
t.setNext(tmp);
number++;
}
}
public Object removeEnd(){
if(isEmpty())
return null;
if(head.getNext() == null)
return remove();
pOneChildNode t = head;
while(t.getNext().getNext() != null)
t = t.getNext();
Object obj = t.getNext().getData();
t.setNext(t.getNext().getNext());
number--;
return obj;
}
public Object peek(int n){
pOneChildNode t = head;
for(int i = 0;i<n && t != null;i++)
t = t.getNext();
return t.getData();
}
}