exercise17_5.java

java程序设计 机械工业出版社 书籍代码

public class Exercise17_5 {
  public static void main(String[] args) {
    MyQueue queue = new MyQueue();
    queue.add("Tom");
    queue.add("George");
    queue.add("Peter");
  }
}

// MyQueue.java: Implementing a queue using inheritance
class MyQueue extends MyLinkedList {
  public void enqueue(Object o) {
    addLast(o);
  }

  public Object dequeue() {
    return removeFirst();
  }

  public int getSize() {
    return size();
  }

  public String toString() {
    return "Queue: " + toString();
  }
}