What are the characteristics of static code blocks in java

Static code block:

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static code block refers to static{ } wrapped code block, and the static code is only executed once. You can wake up the static code block of the code through Class.forName("classPath"), but it is also executed once.

Format:

static{
}

Features:

• Executed as the class is loaded, only executed once, and takes precedence over the main function.

• is used to initialize the class.

• A class can write multiple static code blocks.

• Creating a reference variable pointing to null will not trigger a static code block.

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Example:

public class HelloA {    
    static{
        System.out.println("I'm A static code block");
    }
}

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