Memory Allocation and Layout

Things that help security in Java

• Memory layout decisions are not made at compile time
• Compiled code references memory via symbolic "handles"
• Late binding of structures - programmers can't interfere with physical memory layout of classes
• Use of garbage collection -- explicit free provides some roundabout methods of illegal type casting

But Java still has a potential weakness

• But programmer can find out integer address of an object via hashCode() method in all objects.