Java Examples

The best way to learn Java programming is by practicing examples. The page contains examples on basic concepts of Java. You are advised to take the references from these examples and try them on your own.

All the programs on this page are tested and should work on all platforms.

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Popular Examples

Java Program to Check Prime Number

Java Program to Display Fibonacci Series

Java Program to Create Pyramids and Patterns

Java Program to Reverse a Number

Popular Examples

• Java Program to Check Prime Number
• Java Program to Display Fibonacci Series
• Java Program to Create Pyramids and Patterns
• Java Program to Reverse a Number

1. Java Program to Print an Integer (Entered by the User)
2. Java Program to Add Two Integers
3. Java Program to Multiply two Floating Point Numbers
4. Java Program to Find ASCII Value of a character
5. Java Program to Compute Quotient and Remainder
6. Java Program to Swap Two Numbers
7. Java Program to Check Whether a Number is Even or Odd
8. Java Program to Check Whether an Alphabet is Vowel or Consonant
9. Java Program to Find the Largest Among Three Numbers
10. Java Program to Find all Roots of a Quadratic Equation
11. Java Program to Check Leap Year
12. Java Program to Check Whether a Number is Positive or Negative
13. Java Program to Check Whether a Character is Alphabet or Not
14. Java Program to Calculate the Sum of Natural Numbers
15. Java Program to Find Factorial of a Number
16. Java Program to Generate Multiplication Table
17. Java Program to Display Fibonacci Series
18. Java Program to Find GCD of two Numbers
19. Java Program to Find LCM of two Numbers
20. Java Program to Display Alphabets (A to Z) using loop
21. Java Program to Count Number of Digits in an Integer
22. Java Program to Reverse a Number
23. Java Program to Calculate the Power of a Number
24. Java Program to Check Palindrome
25. Java Program to Check Whether a Number is Prime or Not
26. Java Program to Display Prime Numbers Between Two Intervals
27. Java Program to Check Armstrong Number
28. Java Program to Display Armstrong Number Between Two Intervals
29. Java Program to Display Prime Numbers Between Intervals Using Function
30. Java Program to Display Armstrong Numbers Between Intervals Using Function
31. Java Program to Display Factors of a Number
32. Java Program to Make a Simple Calculator Using switch. case
33. Java Program to Check Whether a Number can be Expressed as Sum of Two Prime Numbers
34. Java Program to Find the Sum of Natural Numbers using Recursion
35. Java Program to Find Factorial of a Number Using Recursion
36. Java Program to Find G.C.D Using Recursion
37. Java Program to Convert Binary Number to Decimal and vice-versa
38. Java Program to Convert Octal Number to Decimal and vice-versa
39. Java Program to Convert Binary Number to Octal and vice-versa
40. Java Program to Reverse a Sentence Using Recursion
41. Java Program to calculate the power using recursion
42. Java Program to Calculate Average Using Arrays
43. Java Program to Find Largest Element of an Array
44. Java Program to Calculate Standard Deviation
45. Java Program to Add Two Matrix Using Multi-dimensional Arrays
46. Java Program to Multiply Two Matrix Using Multi-dimensional Arrays
47. Java Program to Multiply two Matrices by Passing Matrix to a Function
48. Java Program to Find Transpose of a Matrix
49. Java Program to Find the Frequency of Character in a String
50. Java Program to Count the Number of Vowels and Consonants in a Sentence
51. Java Program to Sort Elements in Lexicographical Order (Dictionary Order)
52. Java Program to Add Two Complex Numbers by Passing Class to a Function
53. Java Program to Calculate Difference Between Two Time Periods
54. Java Code To Create Pyramid and Pattern
55. Java Program to Remove All Whitespaces from a String
56. Java Program to Print an Array
57. Java Program to Convert String to Date
58. Java Program to Round a Number to n Decimal Places
59. Java Program to Concatenate Two Arrays
60. Java Program to Convert Character to String and Vice-Versa
61. Java Program to Check if An Array Contains a Given Value
62. Java Program to Check if a String is Empty or Null
63. Java Program to Get Current Date/Time
64. Java Program to Convert Milliseconds to Minutes and Seconds
65. Java Program to Add Two Dates
66. Java Program to Join Two Lists
67. Java Program to Convert a List to Array and Vice Versa
68. Java Program to Get Current Working Directory
69. Java Program to Convert Map (HashMap) to List
70. Java Program to Convert Array to Set (HashSet) and Vice-Versa
71. Java Program to Convert Byte Array to Hexadecimal
72. Java Program to Create String from Contents of a File
73. Java Program to Append Text to an Existing File
74. Java Program to Convert a Stack Trace to a String
75. Java Program to Convert File to byte array and Vice-Versa
76. Java Program to Convert InputStream to String
77. Java Program to Convert OutputStream to String
78. Java Program to Lookup enum by String value
79. Java Program to Compare Strings
80. Java Program to Sort a Map By Values
81. Java Program to Sort ArrayList of Custom Objects By Property
82. Java Program to Check if a String is Numeric
83. Java Program to convert char type variables to int
84. Java Program to convert int type variables to char
85. Java Program to convert long type variables into int
86. Java Program to convert int type variables to long
87. Java Program to convert boolean variables into string
88. Java Program to convert string type variables into boolean
89. Java Program to convert string type variables into int
90. Java Program to convert int type variables to String
91. Java Program to convert int type variables to double
92. Java Program to convert double type variables to int
93. Java Program to convert string variables to double
94. Java Program to convert double type variables to string
95. Java Program to convert primitive types to objects and vice versa
96. Java Program to Implement Bubble Sort algorithm
97. Java Program to Implement Quick Sort Algorithm
98. Java Program to Implement Merge Sort Algorithm
99. Java Program to Implement Binary Search Algorithm
100. Java Program to Call One Constructor from another
101. Java Program to implement private constructors
102. Java Program to pass lambda expression as a method argument
103. Java Program to Pass the Result of One Method Call to Another Method
104. Java Program to Calculate the Execution Time of Methods
105. Java Program to Convert a String into the InputStream
106. Java Program to Convert the InputStream into Byte Array
107. Java Program to Load File as InputStream
108. Java Program to Create File and Write to the File
109. Java Program to Read the Content of a File Line by Line
110. Java Program to Delete File in Java
111. Java Program to Delete Empty and Non-empty Directory
112. Java Program to Get the File Extension
113. Java Program to Get the name of the file from the absolute path
114. Java Program to Get the relative path from two absolute paths
115. Java Program to Count number of lines present in the file
116. Java Program to Determine the class of an object
117. Java Program to Create an enum class
118. Java Program to Print object of a class
119. Java Program to Create custom exception
120. Java Program to Create an Immutable Class
121. Java Program to Check if two strings are anagram
122. Java Program to Compute all the permutations of the string
123. Java Program to Create random strings
124. Java Program to Clear the StringBuffer
125. Java Program to Capitalize the first character of each word in a String
126. Java Program to Iterate through each characters of the string.
127. Java Program to Differentiate String == operator and equals() method
128. Java Program to Implement switch statement on strings
129. Java Program to Calculate simple interest and compound interest
130. Java Program to Implement multiple inheritance
131. Java Program to Determine the name and version of the operating system
132. Java Program to Check if two of three boolean variables are true
133. Java Program to Iterate over enum
134. Java Program to Check the birthday and print Happy Birthday message
135. Java Program to Implement LinkedList
136. Java Program to Implement stack data structure
137. Java Program to Implement the queue data structure
138. Java Program to Get the middle element of LinkedList in a single iteration
139. Java Program to Convert the LinkedList into an Array and vice versa
140. Java Program to Convert the ArrayList into a string and vice versa
141. Java Program to Iterate over an ArrayList
142. Java Program to Iterate over a HashMap
143. Java Program to Iterate over a Set
144. Java Program to Merge two lists
145. Java Program to Update value of HashMap using key
146. Java Program to Remove duplicate elements from ArrayList
147. Java Program to Get key from HashMap using the value
148. Java Program to Detect loop in a LinkedList
149. Java Program to Calculate union of two sets
150. Java Program to Calculate the intersection of two sets
151. Java Program to Calculate the difference between two sets
152. Java Program to Check if a set is the subset of another set
153. Java Program to Sort map by keys
154. Java Program to Pass ArrayList as the function argument
155. Java Program to Iterate over ArrayList using Lambda Expression
156. Java Program to Implement Binary Tree Data Structure
157. Java Program to Perform the preorder tree traversal
158. Java Program to Perform the postorder tree traversal
159. Java Program to Perform the inorder tree traversal
160. Java Program to Count number of leaf nodes in a tree
161. Java Program to Check if a string contains a substring
162. Java Program to Access private members of a class
163. Java Program to Check if a string is a valid shuffle of two distinct strings
164. Java Program to Implement the graph data structure
165. Java Program to Remove elements from the LinkedList.
166. Java Program to Add elements to a LinkedList
167. Java Program to Access elements from a LinkedList.