Notes for "Head first Java"

• A boolean and an integer are not compatible types in Java
• int x = 1;
• While(x)...
• Objects are stored in heap (Garbage-collectible heap).
• If you're running low on memory, the Garbage Collector will run, throw out the unreachable objects (no reference points to them).
• There is no "global variable" in Java. Use public static instead. Any code, in any class of your application, can access a public static method/variable.
• If the end-user doesn't have a JVM, then you'll also need to include that with your application's classes.