[오라클자바커뮤니티,자바교육강좌,자바학원,JAVA]자바큐,JAVA QUEUE,자바 배열로 만든 큐(Java Array Queue), 자바배열큐,JAVA ARRAY QUEUE

[오라클자바커뮤니티,자바교육강좌,자바학원,JAVA]자바큐,JAVA QUEUE,자바 배열로 만든 큐(Java Array Queue), 자바배열큐,JAVA ARRAY QUEUE

 

import java.io.*;

interface Queue1  {  
           public boolean isEmpty();
     public boolean isFull();
           public Object getFrontEelement();
           public Object getRearEelement();
           public void put(Object theObject);
           public Object remove();
}

class QueueManager implements Queue1 {
 final static int MAXQUEUE=100;
 private Object[] queue;
 private int front;
 private int rear;

 public QueueManager() {
  queue = new Object[MAXQUEUE];
  front = 0;
  rear = -1;
 }

 public boolean isEmpty() {
  return front > rear;
 }

 public boolean isFull() {
  return rear == MAXQUEUE-1;
 }

 public void put(Object theObject) {
  if (isFull()) {
   System.out.println("Queue가 꽉 찼습니다...");
   return;
  }
  queue[++rear] = theObject;
 }

 public Object remove() {
  if (isEmpty()) {
   System.out.println("Queue가 공백 입니다...");
   return null;
  }
  Object item = queue[front];
  front++;
  return item;
 }

 public Object getFrontEelement() {
  return queue[front];
 }

 public Object getRearEelement() {
  return queue[rear];
 }

 public void pointerPrint() {
  System.out.println("F : " + front + " , R: " + rear);
 }
}

public class QueueTest {
 public static void main(String[] args) {
  QueueManager q = new QueueManager();
  q.put(new String("aaaa"));
  q.put(new String("bbbb"));
  q.put(new String("cccc"));
  System.out.println("a,b,c 삽입후...");
  q.pointerPrint();

  q.remove();
  System.out.println("aaaa 삭제후...");
  System.out.println("front : " + q.getFrontEelement());
  System.out.println("rear  : " + q.getRearEelement());
  q.pointerPrint();
 }
}

 

 

 

 

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