How can I cast a list using generics in Java?

Question

Please consider the following snippet:

public interface MyInterface {

    public int getId();
}

public class MyPojo implements MyInterface {

    private int i         


        

Answer 1

Try to use interfaces everywhere except when constructing instances, and you problems will go away:

public List getMyInterfaces()
{
    List myInterfaces = new ArrayList(0);
    myInterfaces.add(new MyPojo(0));
    myInterfaces.add(new MyPojo(1));

    return myInterfaces;
}

As others have said already, the use of MyInterface fixes your problem. It is also better to use the List interface instead of ArrayList for return types and variables.