Exercise : jGRASP Debugger
We are going to practice stepping into a method and stepping over a method.
Using Pyramids.java, set a breakpoint on the first call
to drawPyramid and hit the debug button. The program should
begin executing. Arrange your windows so that you can see both the jGRASP
window and the DrawingPanel window at the same time. Under
the debug controls, you should see these options:
Hover your mouse over the leftmost one (the down-pointing arrow). jGRASP indicates that this is used to "Step over" a method call. Use this when you don't want to see the details of how a method executes. Hit this once. You should be at the second call on
drawPyramid. Hit the
button again to get to the third call.
Hover your mouse over the second icon (the one that looks like an arrow pointing down and right) and jGRASP will tell you that this is used to "Step in" a method. Click on that to step into the third method call.
continued on the next slide...