/*
* 隊列
*/
public class MyCycleQueue {
//底層使用數組
private long[] arr;
//有效數據的大小
private int elements;
//隊頭
private int front;
//隊尾
private int end;
/**
* 默認構造方法
*/
public MyCycleQueue() {
arr = new long[10];
elements = 0;
front = 0;
end = -1;
}
/**
* 帶參數的構造方法,參數爲數組的大小
*/
public MyCycleQueue(int maxsize) {
arr = new long[maxsize];
elements = 0;
front = 0;
end = -1;
}
/**
* 添加數據,從隊尾插入
*/
public void insert(long value) {
if(end == arr.length - 1) {
end = -1;
}
arr[++end] = value;
elements++;
}
/**
* 刪除數據,從隊頭刪除
*/
public long remove() {
long value = arr[front++];
if(front == arr.length) {
front = 0;
}
elements--;
return value;
}
/**
* 查看數據,從隊頭查看
*/
public long peek() {
return arr[front];
}
/**
* 判斷是否爲空
*/
public boolean isEmpty() {
return elements == 0;
}
/**
* 判斷是否滿了
*/
public boolean isFull() {
return elements == arr.length;
}
}