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    In Java, access modifiers define the visibility and accessibility of classes, interfaces, methods, and variables. They are crucial for encapsulation and controlling how different parts of a program interact.

    Java provides four main access modifiers:

    1. private

    • Accessible only within the same class.

    • Not applicable to top-level classes or interfaces.

    • Commonly used to hide internal details and enforce encapsulation.

    class Person {
    private String name;
    public void setName(String name) { this.name = name; }
    public String getName() { return name; }
    }
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    2. Default (Package-Private)

    • No keyword is used.

    • Accessible only within the same package.

    • Often used for package-level utilities.

    class Car {
    String model; // default access
    }
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    3. protected

    • Accessible within the same package and in subclasses (even if in different packages).

    • Useful in inheritance-based designs.

    class Vehicle {
    protected int speed;
    }
    class Bike extends Vehicle {
    void setSpeed(int s) { speed = s; }
    }
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    4. public

    • Accessible from anywhere in the program.

    • Used for APIs, service classes, and widely shared utilities.

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    Java Access Modifiers (With Examples) - Programiz
    Programiz
    Java Access Modifiers (With Examples) - Pro…

    In this tutorial, we will learn about the Java Access Modifier, its types, and how to use th…

    Programiz
    What is a default access modifier in Java?
    When no access modifier is specified for a class, method, or data member, it is said to have the default access modifier by default. This means only classes within the same package can access it. Explanation: Members with default access cannot be accessed from classes in a different package. Geeks.java: Default class within the same package
    geeksforgeeks.org
  1. GeeksForGeeks
    https://www.geeksforgeeks.org › java › access...この結果を翻訳する

    Access Modifiers in Java - GeeksforGeeks

    2025年11月22日 · In Java, access modifiers are essential tools that define how the members of a class, like variables, methods, and even the class itself, can be accessed from other parts of our program.

    • Java Inheritance is a fundamental concept in OOP (Object-Oriented Programming). It …

    • In Java, access modifiers are essential tools that define how the members of a …

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  2. Programiz
    https://www.programiz.com › java-programming › access...この結果を翻訳する

    Java Access Modifiers (With Examples) - Programiz

    In this tutorial, we will learn about the Java Access Modifier, its types, and how to use them with the help of examples. In Java, access modifiers are used to set the accessibility (visibility) of classes, …

  3. W3School
    https://www.w3schools.com › java › java_modifiers.aspこの結果を翻訳する

    Java Modifiers - W3Schools

    The public keyword is an access modifier, meaning that it is used to set the access level for classes, attributes, methods and constructors. We divide modifiers into two groups:

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    Access Modifiers in Java - Baeldung

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    Access Modifiers in Java (With Examples) – TecAdmin

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    Java Access Modifiers – Public, Private, Protected | Stack a Byte

    Understand Java’s access modifiers—public, private, protected, and default. Learn how to use them for secure, maintainable code with real-world examples.

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    Access Modifiers in Java: The Ultimate Gatekeepers

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