Java数据结构和算法 栈与队列

(1)栈
package ChapterOne;
public class Stack {
//栈数组
long stackArr[];
//栈的大小
int maxSize;
//栈的顶部
int top;
//初始化一个大小为size的栈
public Stack(int size){
maxSize = size;
stackArr = new long[size];
top = -1;
}
//出栈操作
public long pop(){
return stackArr[top--];
}
//进栈操作
public void push(long value){
stackArr[++top] = value;
}
//判断栈是否为空
public boolean isEmpty(){
return top == -1;
}
//判断栈是否已满
public boolean isFull(){
return top == maxSize-1;
}
//取栈顶元素
public long peek(){
return stackArr[top];
}
public static void main(String[] args) {
Stack stack = new Stack(10);
while(!stack.isFull()){
long v = (long) (Math.random()*100);
stack.push(v);
System.out.print(v+" ");
}
System.out.println();
while(!stack.isEmpty()){
long topValue = stack.pop();
System.out.print(topValue+" ");
}
System.out.println();
}
}
(2)队列
package ChapterOne;
public class Queue {
//队列数组
private long queueArr[];
//队列的前端下标
private int front;
//队列的尾端下标
private int rear;
//队列的大小
private int maxSize;
//队列中元素的个数
private int nItems;
//初始化一个大小为size的队列
public Queue(int size){
queueArr = new long[size];
maxSize = size;
front = 0;
rear = -1;
nItems = 0;
}
//插入操作
public void insert(long value){
//队列已满
if(rear == maxSize-1)
rear = -1;
queueArr[++rear] = value;
nItems++;
}
//删除操作
public long remove(){
long temp = queueArr[front++];
if(front == maxSize)
front = 0;
nItems--;
return temp;
}
//返回队列第一个元素
public long peakFront(){
return queueArr[front];
}
//判断是否为空
public boolean isEmpty(){
return nItems == 0;
}
//判断是否已满
public boolean isFull(){
return nItems == maxSize;
}
//返回队列中元素的个数
public int size(){
return nItems;
}

public void print(){
for(int i =