5.1、顺序队列(java实现)
1、实现代码
public class SeqQueue {private final int MaxSize = 8;
private int rear; //队尾指针
private int front; //队头指针
private int size; //计数器
private Object seqQueueArray[];
/**
* 初始化
*/
public SeqQueue() {
this.size = 0;
this.front = 0;
this.rear = 0;
seqQueueArray = new Object[MaxSize];
}
public boolean isEmpty(SeqQueue seqQueue) {
if (seqQueue.size == 0){
return true;
}
return false;
}
public boolean isFull(SeqQueue seqQueue) {
if (seqQueue.size > 0 && seqQueue.rear == seqQueue.front){
return true;
}
return false;
}
public void queueAppend(SeqQueue seqQueue,Object element) {
if (isFull(seqQueue)){
System.out.println("已满,无法插入");
return;
}
System.out.println(element+"元素入队列");
seqQueue.seqQueueArray[seqQueue.rear] = element;
seqQueue.rear = (seqQueue.rear +1 )%MaxSize;
seqQueue.size++;
}
public void queueDelete(SeqQueue seqQueue) {
if (isEmpty(seqQueue)){
System.out.println("已空,无法出队列");
return;
}
System.out.print(seqQueue.seqQueueArray[seqQueue.front]+" ");
seqQueue.front = (seqQueue.front +1)%MaxSize;
seqQueue.size--;
}
public void getFront(SeqQueue seqQueue) {
if (isEmpty(seqQueue)){
System.out.println("已空,无法获取队列头");
return;
}
System.out.println("队头元素: "+ seqQueue.seqQueueArray[seqQueue.rear]);
}
public static void main(String[] args) {
SeqQueue seqQueue = new SeqQueue();
seqQueue.getFront(seqQueue);
seqQueue.queueDelete(seqQueue);
for (int i = 0; i < 9; i++) {
seqQueue.queueAppend(seqQueue,i);
}
System.out.println("===========");
seqQueue.queueDelete(seqQueue);
System.out.println("===========");
int number = seqQueue.size;
for (int i = 0; i < number; i++) {
seqQueue.queueDelete(seqQueue);
}
System.out.println();
seqQueue.queueDelete(seqQueue);
}
}
2、实现结果
已空,无法获取队列头已空,无法出队列
0元素入队列
1元素入队列
2元素入队列
3元素入队列
4元素入队列
5元素入队列
6元素入队列
7元素入队列
已满,无法插入
===========
0 ===========
1 2 3 4 5 6 7
已空,无法出队列
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