将组合框对象投射回其正确的类型

Question

I have a combobox of objects (two types; ProductGroup and Family). I would like to use a command to find out what type of object the selected item is.

I went out on a limb and tried

if (cbFamily.getSelectedItem() instanceof ProductGroup) {
    JOptionPane.showMessageDialog(mainWindow, "You have selected a ProductGroup")
}

I had no luck

Note: I am new to Java so I may need to ask for further clarification on some answers

Answer 1

Your code should works fine. Problem will be somewhere else. Use debugger, or write "System.out.println(cbFamily.getSelectedItem().getClass());" before your "if" to determine what class is returned from your combobox.

Answer 2

What about implementing a toString() function which returns the class name? Or making use of Object.getName() . You can also try overriding it and make your own.