要更新您的組合框，您可以使用類似的東西。

// due to order problem, transfer of elements from map to combo box have sence?

// for ordered maps, like LinkedHashMap or TreeMap

Map<String, String> strMap = new LinkedHashMap<>();

// fill map...

JComboBox<String> combo = new JComboBox<>();

// some code...

// now update the combo box content

combo.setModel(new DefaultComboBoxModel<>(strMap.values().toArray(new String[0])));

您可以直接使用哈希圖的值...

yourMap.values().forEach((value)-> {
       // Do whatever your want with each value. 
    });