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. Print all numbers in a range
  36. Compound interest
  37. Display N th fibonacci number
  38. Factorial of a number
  39. Count no of digits
  40. Power of a number
  41. Sum of the digits of a number
  42. Reverse of a number
  43. Find sum and average of N numbers
  44. Check a number is a palindrome or not
  45. Check a number is a prime or not
  46. Display first N prime numbers
  47. Display prime numbers between interval
  48. Find the value of permutation and combination
  49. Find the frequency of a digit in a number
  50. Display multiplication table
  51. Check perfect number
  52. Pattern

  53. Square pattern
  54. Rectangle pattern
  55. Rhombus pattern
  56. Half diamond pattern
  57. Diamond pattern
  58. Right triangle, Half pyramid pattern
  59. Full pyramid pattern
  60. Inverted full pyramid pattern
  61. Snake number pattern
  62. Spiral pattern
  63. Hollow rectangle pattern
  64. Hollow rhombus pattern
  65. Hollow diamond pattern
  66. Hollow pyramid pattern
  67. Floyd's triangle pattern
  68. Pascal's triangle pattern
  69. Array

  70. Find largest element
  71. Find smallest element
  72. Find sum and average of N numbers
  73. Bitwise operation

  74. Check if a number is even or odd
  75. Matrix

  76. Check equality of two matrices
  77. Matrix addition
  78. Matrix subtraction
  79. Geometry

  80. Calculate the Area, Perimeter and Diagonal of a square
  81. Games

  82. Rock paper scissors random approach
  83. Miscellaneous

  84. Multiply large numbers


Function & Pointer


Structure and Union

File Input/Output


  1. Multiply large numbers