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This article mainly introduces the java inter-memory interaction refers to what the relevant knowledge, the content is easy to understand, the operation is simple and fast, with a certain reference value, I believe that you read this java inter-memory interaction refers to what the article will have a harvest, let's take a look.

The details are as follows:

1. The interaction protocol between the main memory and the working memory, that is, the implementation details of how to copy a variable from the main memory to the working memory and how to synchronize from the working memory to the main memory.

2. The Java memory model defines eight atomic operations to complete:

Lock: identifies a variable as being exclusive by a thread

Unclock: release a variable from the exclusive state so that the released variable can be locked by other threads

Read: transfers the value of a variable from main memory to working memory for subsequent load operations

Load: put the variable value obtained by the read operation from the main memory into a copy of the variable in the working memory

Use: passes the value of a variable in working memory to the execution engine, which is used whenever the virtual machine encounters an instruction that uses the variable

Assign: assigns a value received from the execution engine to a variable in working memory, which is used whenever the virtual machine encounters an instruction to assign a value to the variable

Store: passes the value of a variable in working memory to main memory for subsequent write operations

Write: writes the value of the variable obtained by the store operation from the working memory to the variable in the main memory.

What are the basic data types of java? the basic data types of Java are as follows:

1. Integer type, which is used to represent the data type of integer.

2. Floating point type, which is used to represent the data type of decimals.

3. Character type. The keyword of character type is "char".

4. Boolean type, which is the basic data type that represents logical values.

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