[英]What arguments should add function accept for generic set<E> in java?
I am trying to write a Set<E>
interface in Java, that will be implemented by another class mySet<E>
utilising an arrayList<E>
to store the elements. 我正在尝试用Java编写一个
Set<E>
接口,它将由另一个类mySet<E>
实现,利用arrayList<E>
来存储元素。
I intend to include regular set functions: add()
, remove()
, union()
intersection()
etc. 我打算包括常规的set函数:
add()
, remove()
, union()
intersection()
等。
What should the type be for my add()
and remove()
functions? 我的
add()
和remove()
函数的类型应该是什么? I have tried using add(Object E)
and add(<E>)
but am running into errors. 我尝试过使用
add(Object E)
并add(<E>)
但遇到了错误。
add(E objToAdd);
remove(E objToRemove);
A Set<K>
would usually extend AbstractSet<K>
and implement: Set<K>
通常会扩展AbstractSet<K>
并实现:
@Override
public Iterator<K> iterator() {
@Override
public boolean add(K k) {
@Override
public int size() {
@Override
public boolean contains(Object o) {
Whenever we write an implementation of generics type We use the same type notation as that of the interface/class. 每当我们编写泛型类型的实现时,我们使用与接口/类相同的类型表示法。
public interface ISet<E>{
boolean add(E element);
boolean remove(E element);
}
As per your question as you need to create an implementation of this you can try the below sample code: 根据您的问题,您需要创建此实现,您可以尝试以下示例代码:
public class MySet<E> implements ISet<E>{
private List<E> myInnerList = new ArrayList<E>();
public boolean add(T element){
//write you code here for adding the element
// i.e. myInnerList.add(element);
return false;
}
public boolean remove(T element){
//write you code here for adding the element
// i.e. myInnerList.remove(element);
return false;
}
}
Hope this solves your issue. 希望这能解决您的问题。
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