Java - Modifier Types


Advertisements

Modifiers are keywords that you add to those definitions to change their meanings. Java language has a wide variety of modifiers, including the following −

To use a modifier, you include its keyword in the definition of a class, method, or variable. The modifier precedes the rest of the statement, as in the following example.

Example

public class className {
   // ...
}

private boolean myFlag;
static final double weeks = 9.5;
protected static final int BOXWIDTH = 42;

public static void main(String[] arguments) {
   // body of method
}

Access Control Modifiers

Java provides a number of access modifiers to set access levels for classes, variables, methods and constructors. The four access levels are −

  • Visible to the package, the default. No modifiers are needed.
  • Visible to the class only (private).
  • Visible to the world (public).
  • Visible to the package and all subclasses (protected).

Non-Access Modifiers

Java provides a number of non-access modifiers to achieve many other functionality.

  • The static modifier for creating class methods and variables.

  • The final modifier for finalizing the implementations of classes, methods, and variables.

  • The abstract modifier for creating abstract classes and methods.

  • The synchronized and volatile modifiers, which are used for threads.

What is Next?

In the next section, we will be discussing about Basic Operators used in Java Language. The chapter will give you an overview of how these operators can be used during application development.

Useful Video Courses


Video

Java Date and Time Online Training

16 Lectures 2 hours

Malhar Lathkar

Video

Java Servlet Online Training

19 Lectures 5 hours

Malhar Lathkar

Video

JavaScript Online Training

25 Lectures 2.5 hours

Anadi Sharma

Video

Java Online Training

Most Popular

126 Lectures 7 hours

Tushar Kale

Video

Java Essential Training

119 Lectures 17.5 hours

Monica Mittal

Video

Java Essentials Online Training

76 Lectures 7 hours

Arnab Chakraborty

Advertisements