List of Java Programs

Here is the list of all Java programs available in this blog. You can find basic level programs as well as advanced level programs. All of these programs have been categorised below. Click on the buttons inside the tabbed menu to explore those categories.


  1. Hello, World! Program
  2. Addition, subtraction, multiplication and division
  3. Convert a character to ASCII value
  4. Convert ASCII value to a character
  5. Compute Quotient and Remainder
  6. Swap two numbers without third variable
  7. Swap two numbers using third variable
  8. Swap two numbers using X-OR
  9. Fahrenheit to Celsius conversion
  10. Centigrade to Fahrenheit conversion
  11. Simple interest
  12. Calculate percentage of a number
  13. Conversion between Kilograms and Grams
  14. Decision making

  15. Check vowel or consonant
  16. Check if a character is a digit
  17. Conversion between uppercase and lowercase letter
  18. Check if a number is positive or negative
  19. Check if a number is even or odd
  20. Find largest among three numbers
  21. Check if a number is a perfect square
  22. Check leap year
  23. Simple calculator
  24. Calculate profit and loss
  25. Roots of quadratic equation
  26. Find the letter grade of a student
  27. Find the age group
  28. Calculate income tax
  29. Display month according to input number
  30. Conversion between 12-hour and 24-hour time format
  31. Loop & Recursion

  32. Print natural numbers from 1 to N
  33. Print natural numbers using recursion
  34. Sum of first N natural numbers / Sum of series 1 + 2 + 3 + .. + N
  35. Compound interest
  36. Display N th fibonacci number
  37. Factorial of a number
  38. Sum of the digits of a number
  39. Reverse of a number
  40. Find sum and average of N numbers
  41. Display first N prime numbers
  42. Find the value of permutation and combination
  43. Find the frequency of a digit in a number
  44. Check perfect number
  45. Pattern

  46. Square pattern
  47. Rectangle pattern
  48. Rhombus pattern
  49. Half diamond pattern
  50. Diamond pattern
  51. Right triangle, Half pyramid pattern
  52. Full pyramid pattern
  53. Inverted full pyramid pattern
  54. Snake number pattern
  55. Spiral pattern
  56. Hollow rectangle pattern
  57. Hollow rhombus pattern
  58. Hollow diamond pattern
  59. Hollow pyramid pattern
  60. Floyd's triangle pattern
  61. Pascal's triangle pattern
  62. Array

  63. Find largest element
  64. Find smallest element
  65. Find sum and average of N numbers
  66. Bitwise operation

  67. Check if a number is even or odd
  68. Matrix

  69. Check equality of two matrices
  70. Matrix addition
  71. Matrix subtraction
  72. Games

  73. Rock paper scissors random approach


Function & Pointer


Structure and Union

File Input/Output