如果对象由多维数组保存，可以使用该方法吗？

Question

I saw some post quite similar but did not hit spot on.

I was thinking something like this:

Object[][] test = {
          {"Name", new JTextField()},
          {"Gender", new JComboBox()}
}

I tried something like this but i cannot use the method of the JTextField or the JComboBox. How do I instantiate this depending on there 1-index? Is this possible?

Answer 1

If you know for sure what it is, you can cast it when you get it out, like this

JComboBox box = (JComboBox)(test[1][1]);
box.whatever();

However, instead of using an Object[][] , why not just make a class?

class UIWidgets {
    JTextField name;
    JComboBox gender;
}

Answer 2

You need to cast first before you can access methods specific to the type, since Java sees them all as instances of Object :

((JTextField)test[0][1]).CallMethodHere();

Or alternately:

JTextField tf = (JTextField)test[0][1];
// do something with tf

Answer 3

尝试这个：

((JTextField) test[0][1]).setText("someText");