How to detect when a variable changes value

OR Toggle Breakpoint on the line where the variable is declared, then right-click on the resulting entry, select "breakpoint properties" and deselect "Field Access".

For a class or instance variable

1. right-click on the variable in the outline view
2. select "Toggle Watchpoint"
3. Then, in the breapkoints view, you can right-click on the resulting entry
4. select "breakpoint properties"
5. deselect "Field Access".