Question

I have this Userlist Object with some data in it

Userlist userlist = new Userlist();
userlist.setUserlistItem(userlistitem);

Now i have another Object UserDatalists , the structure of UserDatalists is shown below

public class UserDatalists{

    private Userlist[] userlist;

    public Userlist[] getUserlist() {
        return userlist;
    }

    public void setUserlist(Userlist[] userlist) {
        this.userlist = userlist;
    }

}

As you can see that the UserDatalists Object accepts an array of Userlist .

Please tell me how can i convert the Userlist to an array , so that i can set it inside the UserDatalists

public class Userlist {

    private static final long serialVersionUID = 1L;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public UserlistItem[] getUserlistItem() {
        return UserlistItem;
    }

    public void setUserlistItem(UserlistItem[] userlistItem) {
        UserlistItem = userlistItem;
    }

    private String id;
    private UserlistItem[] UserlistItem;

}






 public class UserDatalists {

        private Userlist[] userlist;

        public Userlist[] getUserlist() {
            return userlist;
        }

        public void setUserlist(Userlist[] userlist) {
            this.userlist = userlist;
        }

    }

Answer 1

If you’re allowed to, change the signature of

public void setUserlist(Userlist[] userlist) {

to

public void setUserlist(Userlist ... userlist) {

which is effectively the same but allows you to provide single and multiple parameters or just arrays to the method.

Alternatively run the method like this:

obj.setUserlist (new Userlist[] { userlist });