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Why Final Class used in Java?
The final keyword is used with a class to create a final class. The final class cannot be inherited and so the final keyword is commonly used with a class to prevent inheritance.
A program that demonstrates a final class in Java is given as follows:
Example
final class A {
private int a = 9;
public void printA() {
System.out.println("Value of a = " + a);
}
}
public class Demo {
public static void main(String args[]) {
A obj = new A();
obj.printA();
}
}Output
Value of a = 9
Now let us understand the above program.
The class A is a final class. This means that it cannot be inherited. It has a private data member a and a method printA() that displays the value of a. A code snippet which demonstrates this is as follows:
final class A {
private int a = 9;
public void printA() {
System.out.println("Value of a = " + a);
}
}In the main() method in class Demo, an object obj of final class A is created. Then printA() method is called. A code snippet which demonstrates this is as follows:
public class Demo {
public static void main(String args[]) {
A obj = new A();
obj.printA();
}
}
Updated on: 30-Jul-2019
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