Access Modifiers in Java

Sep 27, 2024#Java91

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In Java, access modifiers control the visibility of classes, methods, and variables: - **public**: Accessible from anywhere; can be referenced in any class. - **private**: Accessible only within the defining class; not directly accessible from other classes. - **protected**: Accessible within the same package and by subclasses; suitable for members intended for inheritance. - **default**: No modifier means accessible only within the same package. **Summary**: - public: Accessible everywhere - private: Accessible only within the class - protected: Accessible in the same package and subclasses - default: Accessible within the same package only

In Java, public, private, and protected are access modifiers used to control the accessibility of classes, methods, and variables.

public#

Accessible from anywhere
Can create references to this member in any other class.

public class MyClass {
    public int myPublicVariable;
}

private#

Accessible only within the class that defines it.
Other classes cannot directly access this member.

public class MyClass {
    private int myPrivateVariable;
    
    private void myPrivateMethod() {
        // Available only in MyClass
    }
}

protected#

Accessible in other classes in the same package and all subclasses.
Suitable for members of classes that need to be inherited.

public class MyClass {
    protected int myProtectedVariable;
}

Default Access Modifier#

The default access modifier (no modifier used) allows access within the same package.

class MyClass {
    int myDefaultVariable; // Default access modifier
}

Summary#

public: Accessible from anywhere
private: Accessible only within the class
protected: Accessible in the same package and subclasses
Default: Accessible within the same package