Understanding of Java class loading

There are three stages of Java load exhaustion:

1. Load stage: When encountering a static member including a method in the new Access class, the JVM class loader is prompted to load the class into memory (binary bytecode file). Nothing else is to be done. Example: Object.class simply loads the class into memory. No other action was taken.

2. Link stage: The Non-Object.class method (known only to this point) to access the information of the class, will enter the link stage, in which the domain in the class will be allocated memory, assigned to the class domain (member) default value (only the class domain has a default value), if necessary, the domain will be resolved, such as a field to add a symbol "=", the right value is parsed and a reference to the object is created that the object is a reference type.

3. Initialization phase: If the class is encountered when the class has a superclass (base class, parent Class), then the first three steps to its parent class. The static initialization block is then executed (once only) and the static initialization method (if necessary).

4. Class initialization complete

Attention:

There is no need to initialize a class for static compile-time constants (static final) (non-static must be new to access, and so on when your new comes out of the initial completion) for access.

What is a compile-time constant?

Compile-time constants are the amount at compile time there is already a determined value, in Java static constants must be initialized, in the static initialization block, static construction method if there are multiple construction methods, it must be in each of the construction method to display the initialization.

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Understanding of Java class loading