Adding all Person objects into combobox

Question

Hello I have the following code

RekeningApp app;
Persoon persoon;
JComboBox personenList;

PersoonView(RekeningApp app) {

    this.app = app;

    personenList = new JComboBox();

    personenList.addItemListener(new ItemChangeListener());


}

Now I need a Foreach loop that goes through an arraylist filled with Persoon objects that is in the RekeninApp class.

For this arraylist I have a getter in RekeningApp like this

List<Persoon> Pers = new ArrayList<Persoon>();

 public List getPersonen() {

    return Pers;

}

So right after I make the combobox there must be a foreach loop only the problem is that when I make a loop It says the types are incompatible.

for (Persoon p : app.getPersonen()) {
        personenList.addItem(p);    
}

score 3 · Accepted Answer · answered Oct 22 '13 at 11:27

3

You need to have a typed List to avoid casting.

public List<Persoon> getPersonen() {
    return Pers;
}

answered Oct 22 '13 at 11:27

Kayaman

72,141
5
83
121

score 1 · Answer 2 · edited May 23 '17 at 11:50

1

when I make a loop It says the types are incompatible.

That is because you are using a raw type List as return type. Iterating over such List will get you an Object and not Persoon. Change the return type to List<Person>:

public List<Persoon> getPersonen() {
    return Pers;
}

Related Post:

What is a raw type and why shouldn't we use it?

edited May 23 '17 at 11:50

Community

1
1

answered Oct 22 '13 at 11:28

Rohit Jain

209,639
45
409
525

Adding all Person objects into combobox

2 Answers2