Detailed introduction to java storage and java object creation process

The following editor will bring you an article about java storage and javaobjectcreation process (detailed explanation). The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.

java storage:

1) Register: This is the fastest storage area, located inside the processor. But the number of registers is limited, so registers are allocated according to demand. We can't do it directly.

2) Stack: is located in general-purpose RAM and can obtain direct support from the processor through the stack pointer. As the stack pointer moves down, new memory is allocated. Moving online will free up memory. But

When creating the program, you must know the specific life cycle of all items stored in the stack in order to move the pointer up and down. Generally store basic types and java object references.

3) Heap: is located in general RAM and stores all java objects. There is no need to know the specific life cycle.

4)ConstantStorage:Constant values ​​are usually stored directly inside the program code.

5) Non-RAM storage: The data completely survives outside the program and is not under the control of the program. It can also exist when the program is not running. It is to transform objects into things that can be stored on other media. Such as: stream objects, persistent objects

Object creation process:

1):Even if there is no explicit call to static, the constructor is actually a static method. Therefore, when creating an object for the first time or calling a static method/static field for the first time, the java interpreter must search the class path and locate the class file.

2): Load the class file, and the relevant static methods or variables will be executed. Therefore, static initialization will only be initialized once when the class is loaded.

3): When created using new, sufficient storage space will be allocated for the object on the heap first.

4): Clear this area to zero. At this time, the basic member variables or references in the object will be automatically initialized by default. The number is zero and the reference is null.

5): Perform all initialization actions that appear at the field definition.

6): Execute the constructor.

The above is the detailed content of Detailed introduction to java storage and java object creation process. For more information, please follow other related articles on the PHP Chinese website!