如何创建一个实现java.util.collections的类

本文介绍了如何创建一个实现java.util.collections的类的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我试图创建一个类， MyStack 将实现一个java.util.collections类。 MyStack 将覆盖集合类的一些方法，如add（类似于push），remove（类似于pop）等。我打算在类a 设置或集合类的其他接口，除了 MyStack 不会是一个接口或抽象类，创建 MyStack 类型的对象。 I am trying to create a class say MyStack that would implement a java.util.collections class. MyStack will override some methods of the collections class like add(similar to push), remove(similar to pop) etc.. I intend to model the class on the same lines as a Set or other interfaces of the collection class except that MyStack would not be an interface or abstract class and that we can create objects of type MyStack. 我有语法的问题，因为我不知道我是否正确的方向。我到目前为止都是这样的 - 注意 - 没有方法已经被定义到目前为止 - 我试图得到的框架权利，然后继续定义的方法。 I have problems with the syntax as I am not sure if I am proceeding in the right direction.All I have so far is something like this - NOTE - None of the methods have been defined so far - I am trying to get teh skeleton right before proceeding to define the methods. import java.util.*;public class MyStak implements java.util.Collection<E>{ public boolean add(E o){ return false; } public boolean addAll(Collection c){ return false; } public void clear() { } public boolean contains(Object o){ return false; } public boolean containsAll(Collection o){ return false; } public boolean equals(Object c){ return false; } public int hashcode(){ return 0; } public boolean isEmpty(){ return false; } public Iterator iterator(){ return null; } public boolean remove(Object o){ return false; } public boolean removeAll(Collection o){ return false; } public boolean retainAll(Collection o){ return false; } public int size(){ return 1; } public Object[] toArray(){ return null; } public Object[] toArray(Object[] a){ return null; } } 我有几个编译时间错误像 - I have a couple of compile time errors like - +public class MyStak implements java.util.Collection<E>{Multiple markers at this line - The type MyStak must implement the inherited abstract method Collection<E>.add(E) - E cannot be resolved to a type +public boolean add(E o){Multiple markers at this line - E cannot be resolved to a type - implements java.util.Collection<E>.add我的代码修改，示例，我的代码更正，教程链接等， Any code modifications, examples , corrections to my code , links to tutorials etc will we highly appreciated. 推荐答案确保在< E> 您的班级：public class MyStak<E> implements java.util.Collection<E> ^^^如果你想让自己的生活更容易尝试子分类 AbstractCollection 直接实现 Collection 。它为大多数方法提供了合理的默认实现，以最小化需要编写的代码量。If you want to make life easier on yourself try sub-classing AbstractCollection instead of implementing Collection directly. It provides reasonable default implementations for most of the methods to minimize the amount of code you need to write. java.util AbstractCollection< E> 此类提供了 Collection 接口，以尽量减少实现此接口所需的工作量。 java.util Class AbstractCollection<E> This class provides a skeletal implementation of the Collection interface, to minimize the effort required to implement this interface.要实现一个不可修改的集合，程序员只需要扩展这个类并提供迭代器和 size 方法的实现。 （ iterator 方法返回的迭代器必须实现 hasNext 和 next 。）To implement an unmodifiable collection, the programmer needs only to extend this class and provide implementations for the iterator and size methods. (The iterator returned by the iterator method must implement hasNext and next.)要实现可修改的集合，程序员必须另外覆盖此类的 add 方法抛出 UnsupportedOperationException ），并且 iterator 方法返回的迭代器必须另外实现其 remove 方法。To implement a modifiable collection, the programmer must additionally override this class's add method (which otherwise throws an UnsupportedOperationException), and the iterator returned by the iterator method must additionally implement its remove method.程序员通常应提供 void code> Collection 接口规范中的建议。The programmer should generally provide a void (no argument) and Collection constructor, as per the recommendation in the Collection interface specification. 这篇关于如何创建一个实现java.util.collections的类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！