java-07: Memory division

java memory is divided into five parts

　　1, the stack (stack): the method are stored in local variables

　　2, the heap (heap): out of all new objects, which are in the heap, each object has a hexadecimal value is the address, which heap memory data has a default value,

　　3, method area (method area): class related information is stored, the method comprising infos

　　4, native method stacks

　　5, the register