Curriculum
public, private, protected, and default Access Modifiers in Java are important Object-Oriented Programming concepts used to control visibility and accessibility of classes, variables, methods, and constructors. Access modifiers help developers secure applications and manage code accessibility effectively.
In this Core Java course in Jaipur, students will learn access modifiers in Java, visibility rules, access control, encapsulation support, package-level access, inheritance access, and practical examples used in software development.
Access modifiers are widely used in:
Understanding public, private, protected, and default access modifiers in Java helps students build secure and scalable applications.
Access modifiers in Java define:
of:
Access modifiers help developers:
Java mainly provides:
The:
publicaccess modifier allows access:
public members:
public class Student {
public void display() {
System.out.println("Public Method");
}
}Public methods are used for:
The:
privateaccess modifier allows access:
private members:
class Employee {
private int salary = 50000;
public void display() {
System.out.println(salary);
}
}private helps developers:
The:
protectedaccess modifier allows access:
class Animal {
protected void sound() {
System.out.println("Animal Sound");
}
}protected is commonly used in:
When no access modifier is specified:
is applied automatically.
default members:
class Test {
void show() {
System.out.println("Default Access");
}
}| Modifier | Same Class | Same Package | Subclass | Other Package |
|---|---|---|---|---|
| private | Yes | No | No | No |
| default | Yes | Yes | No | No |
| protected | Yes | Yes | Yes | No |
| public | Yes | Yes | Yes | Yes |
Variables can use:
class Student {
private int marks;
public String name;
}Methods use access modifiers to control:
public void display() {
}Constructors also support:
private Student() {
}Encapsulation mainly uses:
privatevariables with:
class Student {
private int marks;
public void setMarks(int marks) {
this.marks = marks;
}
public int getMarks() {
return marks;
}
}private protects:
public methods expose:
protected supports:
default access manages:
Access modifiers provide:
This reduces application security.
Incorrect:
obj.salarydefault access works only within same package.
| public | private |
|---|---|
| Accessible everywhere | Accessible only inside class |
| Less secure | More secure |
Understanding access modifiers helps students:
In this lesson, students learned:
These concepts are essential for Java programming, Object-Oriented Programming, and enterprise software systems.
Access modifiers control visibility and accessibility of classes, variables, and methods.
private is the most secure access modifier.
protected allows access within same package and through inheritance.
default access allows visibility only within same package.
They improve security, encapsulation, and maintainability.
Access modifiers are used in banking systems, APIs, enterprise software, and Android applications.