A day without Mouse (Java keyboard Shortcuts)

Question

Today I decide to make a resolution which consist of testing my Java application using the keyboard solely.

But I am faced with some obstacles:

1. How do you select/deselect a checkbox using the keyboard?
2. How do you collapse/expand items in a JTree?

All help will be much appreciated!

UPDATE:

Here is an example of a checkbox I want to select:

PS: space didn't work

Answer 1

To answer question #2, you can either press - and + keys from the NUMPAD, or use ← and → arrow keys to collapse and expand trees.