1. Hello World in Java 

2. Taking User Input in Java

3. Add Two Numbers in Java

4. Area of Triangle in Java

5. Roots of Quadratic Equation in Java

6. Swap Two Variables in Java

7. Factorial of a Number in Java

8. Simple Interest in Java

9. Compound Interest in Java

10. To Check Armstrong Number in Java

11. Even or Odd Number in Java

12. Sum of Even and Odd Numbers in Java

13. Positive or Negative in Java

14. To Check Whether Given Numbers are Equal or Not in Java

15. Sum of Digits in Java

16. Convert Binary Number into Decimal in Java

17. Convert Decimal Number into Binary in Java

18. Convert Binary Number into Octal in Java

19. Convert Binary Number into Hexadecimal in Java

20. Convert Decimal Number into Octal in Java