The function of java--public_private_void_static

For beginners, these names are familiar but not fully understood.

The following explains one by one:

public and private (these two are for permission scope)

public xxx (){} is a public method that can be called by any class.

private xxx (){} is a private method, that is, it can only be called in this class and cannot be called by any other class.

void function returns a value type (functions can return multiple types of values, such as int, String, Float, etc.)

For example, publicvoid xxx (){} returns nothing after execution of this function.

But this function can be called by any other class because public is used.

Note: If a function returns nothing, but you name it without void, eclipse automatically indicates an error.

static

static is a static function, using static means that this function belongs to the class, and there is no need to create an object when calling it.

public static void test (){}

Instead of creating an object reference with new when called in the main method, you can simply type test () to reference the function.

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