Iterable « iterator « Java Collection Q&A

1. Why is Java's Iterator not an Iterable?    stackoverflow.com

Why does the Iterator interface not extend extend Iterable? The iterator() method could simply return 'this'. Is it on purpose or just an oversight of Java's designers? It would be convenient to be able ...

2. Java: why are iterators not copyable    stackoverflow.com

I would think that Iterator.copy() would be quite a handy function. You could implement iterator filters in a much better way. For example, the only reason in Googles Java Collection for the ...

3. Java Iterator and Iterable    stackoverflow.com

I am trying to understand Java Iterator and Iterable interfaces I am writing this class

class MyClass implements Iterable<String>{
    public String[] a=null;
    public MyClass(String[] arr){
  ...

4. What is the difference between iterator and iterable and how to use them?    stackoverflow.com

I am new in Java and I'm really confused with iterator and iterable. Can anyone explane to me and give some examples?

5. Why are Iterable and Iterator in different packages?    stackoverflow.com

Iterable<E> is in java.lang whereas Iterator<E> is in java.util. Is there a good reason for this or is this merely an artifact of bad design? It seems strange since the only thing ...

6. what is the differnce between Iterable & Iterator    java-forums.org

This is a classic example of an interface vs a concrete class. Usually object types ending in 'able' (Iterable, Comparable, etc...) are objects that implement some interface which guarantees a certain collection of methods will be available. An Iterator itself is a concrete object which is use for the iterations. As JosAH said, a class which implements Iterable is guaranteed to ...

7. Any reason Iterator does not extend Iterable?    forums.oracle.com

I haven't done so much with it that I could tell if such a hack makes sense or not, but I guess at some level it makes sense that the iterator itself does not know, how a list of objects should be iterated. Instead, the objects should tell the iterator what it needs to know.