Populate ComboBox with HashMap?

Question

I'm trying populate a combobox of vaadin7 with informations hashmap. I create a class that return a HashMap when I get the return I use a for each to populate this combobox but does show me only numbers and not the keys and values of hashmap. I'm trying this. ``` /** states of brasil class */ public class EstadosBrasil { private static final HashMap uf = new HashMap(); /** return all states of brasil */ public static HashMap getEstados(){ uf.put("AC", "AC"); uf.put("AL", "AL"); uf.put("AM", "AM"); uf.put("AP", "AP"); uf.put("BA", "BA"); uf.put("CE", "CE"); uf.put("DF", "DF"); uf.put("ES", "ES"); uf.put("FN", "FN"); uf.put("GO", "GO"); uf.put("MA", "MA"); uf.put("MG", "MG"); uf.put("MS", "MS"); uf.put("MT", "MT"); uf.put("PA", "PA"); uf.put("PB", "PB"); uf.put("PE", "PE"); uf.put("PI", "PI"); uf.put("PR", "PR"); uf.put("RJ", "RJ"); uf.put("RN", "RN"); uf.put("RO", "RO"); uf.put("RR", "RR"); uf.put("RS", "RS"); uf.put("SC", "SC"); uf.put("SE", "SE"); uf.p…

Accepted Answer

Change-

```
Object obj = comboEstado.addItem();
comboEstado.setItemCaption(e.getKey(), e.getValue());           
comboEstado.setValue(obj);
```

To-

```
comboEstado.addItem(e.getKey());
comboEstado.setItemCaption(e.getKey(), e.getValue()); 
```

If you want both key and value pair to appear, something like this can be done-

```
comboEstado.setItemCaption(e.getKey(), e.getKey() + " : " +  e.getValue());
```

By the way, I hope you are going to change the values. If both key and value are the same, you can just use a Set.

Populate ComboBox with HashMap?

Solution

Problem