package com.github.mrwengq.first;
public class Queue {
private ArrayList elementData;
public Queue() {
elementData = new ArrayList();
}
public void enQueue(Object o) {
elementData.add(o);
}
public Object deQueue() {
Object ob = null;
ob = elementData.get(0);
elementData.remove(0);
return ob;
}
public boolean isEmpty() {
return elementData.size() == 0;
}
public int size() {
return elementData.size();
}
}