使用CellRenderer选择对象项的JComboBox

Question

我有一个问题，就是我使用一个带有CellRenderer的JComboBox来显示我的类AddressNode的值。但是，当我从DropDown中选择一项时，它会将Object值插入到EditorComponent中，而不是插入呈现的值。我的CellRenderer代码如下：

public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
    super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
    if (value instanceof AddressNode) {
        AddressNode node = (AddressNode) value;
        String displayString = "";

       displayString += node.getStreet() + " " + node.getHouse();
       if (node.getCity() != null)
           displayString += (", " + node.getCity());
       if (node.getPostCode() != null)
           displayString += (" " + node.getPostCode());

        setText(displayString);
    }
    return this;
}

例如，当我从DropDown列表中选择一项时，它会将EditorComponent的值设置为类似于: Model.AddressNode@581280a8的值。而我希望它将值设置为与CellRenderer显示的字符串相同的值。

Answer 1

您可以尝试下面的代码公共组件getListCellRendererComponent(JList列表，对象值，int index，boolean isSelected，boolean cellHasFocus) {

if (value instanceof AddressNode) {
    AddressNode node = (AddressNode) value;
    String displayString = "";

   displayString += node.getStreet() + " " + node.getHouse();
   if (node.getCity() != null)
       displayString += (", " + node.getCity());
   if (node.getPostCode() != null)
       displayString += (" " + node.getPostCode());

    //setText(displayString);
}

return super.getListCellRendererComponent(list，displayString，index，isSelected，cellHasFocus)；}