Java用LinkedList实现队列

import java.util.LinkedList;

public class MyQueue {
private LinkedList ll=new LinkedList();
public void put(Object o)
{
ll.addLast(o);
}
public Object get()
{
if(ll.isEmpty())
{
System.out.println("队列为空，不能出队列了");
return null;
}
return ll.removeFirst();
}
public boolean empty()
{
return ll.isEmpty();
}
public static void main(String []args)
{
MyQueue mq=new MyQueue();
mq.put("one");
mq.put("two");
mq.put("three");
System.out.println(mq.get());
System.out.println(mq.get());
System.out.println(mq.get());

System.out.println(mq.empty());
}

}

one
two
three
true