Instance variable exceptions at runtime - Sun Certified Java Programmer 310-065 Training Course - Part 9 | Java courses

Duration: 16:24 min

Summary: This video continues our discussion of the assignments. The exercises cover when an instance variable is not initialized and how that throws an exception at runtime. Then, we covered cases when reference variables are being changed around. For that we used paint to keep track of the drawing to know where the references are pointing to draw the correct conclusion. As a test taker, this strategy is highly recommended (get a scratch paper and as you go through the code try to determine where the references are pointing). We also covered a case where the variable is declared twice in the same scope. Finally, we used an example that discusses static initialization blocks, instance initialization blocks, inheritance, and the order of calling default constructors.