Implement OOPS concept

1.Write a java program to calculate the sum of two numbers.
2.Write a Java program to check whether the number is even or odd.
3.Write a java program to calculate the factorial of a number.
4.Write a java program to find the Fibonacci series.
5.Write the java program to calculate the area of the rectangle using the concept of constructor.
6.Write a java program to sort the array by using any sorting method.
7.Write a java program using this keyword which is used to refer current class instance variable.
8.Write a java program using this keyword to invoke current class constructor.
9.Write a java program using this keyword to invoke current class method(implicitly).
10.Write a java program using this keyword which can be passed as an argument in the method.
11.Write a java program using this keyword which can be passed as argument in the constructor call.
12.Write a java program using this keyword which can be used to return current class instance.
13.Write a java program to implement method overriding through inheritance.
14.Write a java program to implement method overloading.
15.Write a java program to implement Single Inheritance.
16.Write a java program using super keyword to refer immediate parent class instance variable.
17.Write a java program using super keyword to invoke the parent class method.
18.Write a java program using super keyword to invoke parent class constructor.
19.Write a java program to implement an abstract class.
20.Write a java program to implement interface.
21.Write a java Program to create a user defined package.
22.Write a java Program to create an applet.
23.Write a java program to create a text field and label using AWT.
24.Write a java program to implement exception handling using try-catch block.
25.Write a java program to implement exception handling using multiple catch blocks.
26.Write a java program to implement exception handling by throwing our own exception.