LeetCode——622.设计循环队列

package j12;
 
import java.util.*;
 
class A {
    int x[] = new int[1000];
 
    void addx(int location, int value) {
        x[location] = value;
    }
}
 
class MyCircularQueue {
    A a = new A();
    int length = 0;
    int user = 0;
 
    int rear_location = 0;
    int front_location = 0;
 
    public MyCircularQueue(int k) {
        length = k;
    }
 
    public boolean enQueue(int value) {
        if (user < length) {
            a.x[rear_location] = value;
//            a.addx(rear_location,value);
            rear_location++;
            user++;
            return true;
        }
        else {
            return false;
        }
    }
 
    public boolean deQueue() {
        if (length == 0||rear_location==front_location) {
            return false;
        } else {
            user--;
            front_location++;
            return true;
        }
    }
 
    public int Front() {
        if (length == 0||rear_location==front_location) {
            return -1;
        } else {
            return a.x[front_location];
        }
    }
 
    public int Rear() {
        if (length == 0||rear_location==front_location) {
            return -1;
        } else {
            int temp=rear_location;
            temp--;
            return a.x[temp];
        }
    }
 
    public boolean isEmpty() {
        if (user == 0) {
            return true;
        } else {
            return false;
        }
    }
 
    public boolean isFull() {
        if(user==length){
            return true;
        }
        else {
            return false;
        }
    }
}
 
/**
 * Your MyCircularQueue object will be instantiated and called as such:
 * MyCircularQueue obj = new MyCircularQueue(k);
 * boolean param_1 = obj.enQueue(value);
 * boolean param_2 = obj.deQueue();
 * int param_3 = obj.Front();
 * int param_4 = obj.Rear();
 * boolean param_5 = obj.isEmpty();
 * boolean param_6 = obj.isFull();
 */
 
public class j13 {
    public static void main(String args[]) {
 
        MyCircularQueue circularQueue = new MyCircularQueue(6);
        System.out.println(circularQueue.enQueue(6));
        System.out.println(circularQueue.Rear());
        System.out.println(circularQueue.Rear());
        System.out.println(circularQueue.deQueue());
        System.out.println(circularQueue.enQueue(5));
        System.out.println(circularQueue.Rear());
        System.out.println(circularQueue.deQueue());
        System.out.println(circularQueue.Front());
        System.out.println(circularQueue.deQueue());
        System.out.println(circularQueue.deQueue());
        System.out.println(circularQueue.deQueue());
 
//        MyCircularQueue circularQueue = new MyCircularQueue(3); // 设置长度为 3
//        System.out.println(circularQueue.enQueue(1));  // 返回 true
//        System.out.println(circularQueue.enQueue(2));  // 返回 true
//        System.out.println(circularQueue.enQueue(3));  // 返回 true
//        System.out.println(circularQueue.enQueue(4));  // 返回 false，队列已满
//        System.out.println(circularQueue.Rear());  // 返回 3
//        System.out.println(circularQueue.isFull());  // 返回 true
//        System.out.println(circularQueue.deQueue());  // 返回 true
//        System.out.println(circularQueue.enQueue(4));  // 返回 true
//        System.out.println(circularQueue.Rear());  // 返回 4
    }
}