Shulou(Shulou.com)05/31 Report--

This article mainly introduces the relevant knowledge of "what Java memory allocation refers to". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "what Java memory allocation refers to" can help you solve the problem.

Concept

1, memory is an important original of the computer, temporary storage area, the function is to run the program. The Java virtual machine must run programs to allocate and manage memory.

The programs we write are stored on the hard disk, and the programs on the hard disk cannot be run.

It must be run in memory and empty the memory at the end of the run.

2. The memory allocation area is divided into

Registers: cannot be controlled in a program

Stack: stores basic types of data and references to objects, but the objects themselves are not stored in the stack, but in the heap

Heap: storing data generated with new

Static domain: a static member defined with static stored in an object

Constant pool: stores constants.

3. Understanding of stack

The basic types of variable data defined in the function and the reference variables of the object are allocated in the stack memory of the function. When a variable is defined in a code, Java allocates the storage space for the variable on the stack, and when the variable exits the scope, java automatically frees the storage space allocated by the variable.

What are the collection classes in Java? the collections in Java are divided into four main categories:

1. List list: ordered and repeatable

2. Queue queue: orderly and repeatable

3. Set collection: non-repeatable

4. Map mapping: unordered, key unique, value not unique.

This is the end of the introduction to "what does Java memory allocation mean"? thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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