package cn.net.pikachu.basic;
import java.util.NoSuchElementException;
public class Queue {
private LinkedList list = new LinkedList();
public void enQueue(Object o){
list.addLast(o);
}
public Object deQueue(){
if (isEmpty()){
throw new NoSuchElementException();
}
return list.removeFirst();
}
public boolean isEmpty(){
return list.size()==0;
}
public int size(){
return list.size();
}
@Override
public String toString() {
return list.toString();
}
}