using the iterable interface

[thatos]

i have a class table which implements iterable row,i have implemented the following methods:hasnext,next and remove.my problem is that i dont know how to implement the following method iterator.just in case you are wondering i have a global variable rows which is an array of row

[r035198x]

Those methods you have implemented are not required for an Iterable. All you need is the iterator method implementation. Are you implementing Iterable, Iterator or both?

[thatos]

Those methods you have implemented are not required for an Iterable. All you need is the iterator method implementation. Are you implementing Iterable, Iterator or both?

i just want to implement the iterable but i dont know how to implement the iterator method

[r035198x]

i just want to implement the iterable but i dont know how to implement the iterator method

What is your table based upon?

[thatos]

What is your table based upon?

the table class has a reference to rows which is an array of type row

[r035198x]

the table class has a reference to rows which is an array of type row

A common approach is to wrap the data items in a Java collection that already is Iterable and then just call its iterator method to get the Iterator. That depends of course on how you want to iterate through your data items.

[thatos]

A common approach is to wrap the data items in a Java collection that already is Iterable and then just call its iterator method to get the Iterator. That depends of course on how you want to iterate through your data items.

What do you mean by getting an iterator which depends on how i would like to iterate over my data items,can you please give an example

[JosAH]

What do you mean by getting an iterator which depends on how i would like to iterate over my data items,can you please give an example

Your Iterator should be a little class that implements the Iterator<Row> interface.
An object of this little class should be returned by your (other) class that implements
the Iterable<Row> interface.

kind regards,

Jos

[thatos]

Your Iterator should be a little class that implements the Iterator<Row> interface.
An object of this little class should be returned by your (other) class that implements
the Iterable<Row> interface.

kind regards,

Jos

so the other class must have those methods hasnext,next and remove .

[JosAH]

so the other class must have those methods hasnext,next and remove .

Yep, the little class that is supposed to implement the Iterator interface. The
class that implemenents the Iterable interface should just return an object of that
first class; all according to the documented API specifications.

kind regards,

Jos

[BigDaddyLH]

How about a little code? Here is a sketch that compiles.

import java.util.*;
 
class Row{}
 
public class Example implements Iterable<Row> {
    private Row[] rows;
 
    @Override public Iterator<Row> iterator() {
        return Arrays.asList(rows).iterator();
    }
}

I would prefer to get rid of the array and work just with collections. Why mix?