This exercise will teach you how to use a debugger to inspect the state of a program. To this end, you will be given a program that contains a bug. Your task is to find the bug and fix it.
In this exercise, you're working on a program that manages a list of Computer Science students. The program simulates the workday of a bunch of students who study in buildings at EPFL.
Unfortunately, this functionality is currently broken. Your task is to fix it. The code for the feature can be found in App.java.
Your task is to investigate the issues with the simulation functionality. The simulation
is defined in App.java in the simulate() method. While the
simulation seems to run properly, it is actually broken, since some rooms are still occupied after
the simulation is over. Your task is to:
- Identify the bug in the code;
- Write a regression test for the bug you found; and
- Actually fix the bug.
Here are a few tips specific to this task:
- Your IDE probably has some tools to explore the state of the program at runtime. For example, IntelliJ has a "Memory View" that allows you to inspect the state of the memory at runtime. You can access it by clicking on the "Debug" menu when the program is paused with a breakpoint.
- Can you identify something that students who fail to leave have in common?