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Live Java Exercises, Examples and Projects

Variables
- 664
  votes Multiply any two numbers
- 576
  votes Even or Odd
- 525
  votes Declaring Variables
- 172
  votes Variable Max Values
- 109
  votes Testing your variable knowledge...
- 90
  votes Prime number - Checker
- 42
  votes Area of Triangle
- 42
  votes Name, Age, and Salary
- -95
  votes More User Input of Data
Operators
- 364
  votes Arithmetic Operators
- 274
  votes Degree to Fahrenheit converter
- 190
  votes Arithmetic Operators
- 30
  votes Largest of three numbers
- 25
  votes Find Simple Interest
- 24
  votes Leap year
Arithmetic
- 255
  votes Absolute Equals
- 63
  votes Floor and Ceiling of Number
- 41
  votes Square root, Quadratic root?
- 18
  votes Taylor series to find sine()
- 15
  votes Denominations!
- 14
  votes Sum Limit
- 12
  votes sum of multiples of 3 or 5 below a number
- 11
  votes Octal to Decimal
- 6
  votes Hex2Dec
Flow Control
- 317
  votes No multiples of 3,4
- 40
  votes Right or Wrong
- 24
  votes Space Boxing
- 19
  votes Lucky Sum
- 17
  votes Red lottery Ticket
- 14
  votes Devry Admission Program
- 13
  votes Sleep
- 10
  votes Evenly Spaced
- 10
  votes Date Fashion
- 9
  votes Picture Menu
Loops
- 423
  votes Sum of Prime Digits in a Number
- 281
  votes Counting the number of a's.
- 227
  votes Printing a box of #s
- 157
  votes Sum of 5 integers
- 130
  votes Binary to decimal
- 109
  votes Reverse a Number
- 88
  votes Dynamic adding
- 58
  votes Table
- 57
  votes Factorial value
- 37
  votes Login
- 13
  votes Do You Know The Pin??
- 13
  votes Add Up The Inputs!
- 12
  votes Printing a checkerboard
- 12
  votes Test Palindromic Word
- 10
  votes Extracting Digits
- 9
  votes Collatz Sequence
- 9
  votes Armstrong Numbers
- 9
  votes A New Hope
- 7
  votes Counting Machine
- 6
  votes Binary
Methods
- 360
  votes Square root of a number
- 256
  votes Area of a circle
- 73
  votes Multiple or not
- 70
  votes Convert upper to lower case
- 38
  votes Arithmetic Operations
- 12
  votes Watch a Movie Now
- 11
  votes Cigar Party
- 10
  votes MixString
- 9
  votes Share Digit
- 6
  votes Find the car model
- 5
  votes anglePairs
- 4
  votes Prime number challenge
- -1
  votes The Keychains Shop!
- -17
  votes Keychains for Sale, for real this time
Arrays
- 290
  votes Reverse a String using array
- 201
  votes Add elements of an Array
- 151
  votes Product of greatest and Smallest
- 44
  votes Even numbers only
- 38
  votes Swapping elements
- 10
  votes Swap ends
- 10
  votes tripleUp
- 6
  votes Back-array-thon
- 5
  votes Count Clumps
- 3
  votes Locate The Largest In The Array!
- 3
  votes Poke Trade
- -11
  votes Average Score
- -13
  votes Poke Trade 2
Strings
- 360
  votes Changing Uppercase to Lowercase
- 328
  votes Find length of the string
- 283
  votes Capitalization
- 200
  votes Palindrome Check
- 200
  votes Longest Word
- 179
  votes Change Case
- 126
  votes String Manipulations
- 123
  votes Username
- 71
  votes Remove vowels from a Word
- 45
  votes Toggle String
- 34
  votes First half with second half
- 8
  votes Bob There?
- 7
  votes Decode URL!
- 5
  votes doublex
- 5
  votes List Letters
- 4
  votes Find Triplets
- 4
  votes stringTimes
- 4
  votes Has Bad
- 4
  votes ComboString
- 3
  votes maxBlock
- 3
  votes Romans Numbers to Arabic!
- 3
  votes First Two
- 3
  votes Substring Checker
- 3
  votes Rotate left by two
- 3
  votes Replacer
- 2
  votes SumNumber
- 2
  votes stringSplosion
- 2
  votes compareTo() Challenge
- 2
  votes Word Count!
- 2
  votes altPair
- 2
  votes End Up
- 1
  votes SumNumber .....it's different
- 0
  votes notReplace
- 0
  votes Is it equal or Not???
- -2
  votes Front Again
Classes
- 317
  votes Print using toString
- 32
  votes Author class
- 25
  votes Circle class
- 10
  votes Employee class
- 5
  votes Quadrant Point
- 5
  votes Date Class
- 3
  votes Flip point
- 1
  votes Area and Perimeter using Interfaces!
Inheritance
- 404
  votes Counter - inheritance
- 76
  votes Area of a circle using inheritance
- 7
  votes Method Overriding
- 5
  votes PurchasedItem
- 5
  votes Use Super
Exception Handling
- 52
  votes ID Number Machine
- 43
  votes Ask for certain number
- 2
  votes slopePoint
- -3
  votes Catch the Fish Again...!!
- -4
  votes Convert to centimeters
Polymorphism
- 95
  votes Constructor overloading
- 78
  votes Overloading example
- 54
  votes Overriding example
- 12
  votes Books
- 4
  votes Area of Shapes
Collections
- 8
  votes Getting the Largest Value in an ArrayList
- 3
  votes Stack
- 1
  votes Locating the Largest Value in an ArrayList
- -3
  votes Copying ArrayLists
- -6
  votes Find length of the longest String in ArrayList
Miscellaneous
- 419
  votes Palindrome String
- 362
  votes Is Binary or not
- 320
  votes number to string format
- 309
  votes Convert to uppercase
- 290
  votes Matrix Multiplication
- 279
  votes Quadrant of an Angle
- 268
  votes Print Rectangle
- 267
  votes Name search
- 265
  votes Sum of the digits
- 263
  votes Statement reverse
- 262
  votes Decimal to Octal Conversion
- 249
  votes Pascal Triangle
- 245
  votes String Sort
- 241
  votes Count Ones
- 240
  votes Number Occurrence in Array
- 240
  votes Sum of Naturals divisible by 3 and 5
- 239
  votes Average of positive and negative numbers
- 239
  votes Leap Year check
- 232
  votes Reverse Array
- 231
  votes Flow Control
- 230
  votes Last Samples of a number
- 227
  votes Compare Numbers
- 227
  votes Word Reverse
- 226
  votes triangular star
- 226
  votes Convert in Seconds
- 225
  votes Sexy Pairs
- 223
  votes Transpose of Matrix
- 222
  votes Wind Chill
- 222
  votes Operators
- 220
  votes Number of occurence
- 219
  votes date sort
- 213
  votes Fibonacci Series
- 212
  votes sum of column of a matrix
- 209
  votes Diamond Shape
- 208
  votes Factorial of a given number
- 205
  votes Armstrong Number
- 203
  votes Capitalization
- 203
  votes Arrays and Collections
- 202
  votes Amicable Total
- 202
  votes Cartesian to Polar co-ordinates
- 200
  votes print even numbers using forloop
- 199
  votes Reciprocals Sum average and Product
- 199
  votes Spring month check
- 199
  votes Nested for loops
- 199
  votes Decimal to binary covertor
- 199
  votes ISBN Validation
- 198
  votes Reverse Floyds Triangle
- 197
  votes Arithmetic Demonstration
- 194
  votes Triangular Numbers
- 194
  votes Find Vowels and Consonants
- 189
  votes Perfect number
- 188
  votes Count Occurrence of Character in string
- 185
  votes Consecutive number
- 183
  votes Switch-Case
- 183
  votes Exception Handling
- 182
  votes Sort Three numbers
- 179
  votes Find Day of Given Date
- 179
  votes Sum of Odd Numbers
- 177
  votes Multiplication Table
- 177
  votes Indian rupees formatter
- 177
  votes Euclids GCD Algorithm
- 176
  votes Print Binary Triangle
- 175
  votes Convert binary to decimal
- 173
  votes Collatz Sequence
- 172
  votes Permutation of Strings
- 171
  votes Ulam Sequence
- 163
  votes Remove Character
- 161
  votes Prime Factors
- 156
  votes Gray Code
- 153
  votes Method for finding maximum number amongst three
- 153
  votes Name search
- 152
  votes Print traingle of * using loops
- 145
  votes Find Maximum and Minimum Temperature
- 140
  votes Abundant Numbers
- 134
  votes While loop test
- 130
  votes Number Sequence
- 123
  votes TrimSpace
- 60
  votes First Day
- 56
  votes Sum of the digits of the product of numbers from 1 to n.
- 29
  votes Add the strings

More Examples (User Contributed)

Variables
- 287
  votes Static and Final variable
- 239
  votes Usage of final variable.
- 206
  votes Instance variable
- 192
  votes Addition Of Two Variables
- 190
  votes Short Variable.
- 178
  votes Different data types
- 150
  votes Explicit Conversion
- 126
  votes Local Variable
- 87
  votes Two Variables
- 82
  votes Short and Float Varible
- 79
  votes Short
- 72
  votes Character Datatypes
- 66
  votes Integer
- 61
  votes Single Variable
- 60
  votes Printing different values
- 57
  votes Compute distance light travels in given days using Integer Variables.
- 55
  votes Working with References
- 55
  votes Decimal Dropping
- 55
  votes Variables
- 51
  votes Lifetime
- 48
  votes Different way to print variables
- 46
  votes Compute Area of Circle
- 36
  votes Using int
- 34
  votes Scopes in Java
- 34
  votes Class level and Function Level Variable
- 29
  votes Scope
- 27
  votes Creating variables in Java
- 27
  votes Input to different type variable
- 24
  votes Dynamic initialization in Java
Operators
- 314
  votes Class Member Access (Dot) Operator
- 188
  votes Binary Operator
- 145
  votes AdditionOfTwoNumbers
- 145
  votes Relational Operator
- 142
  votes More Operators
- 139
  votes Boolean Operators
- 116
  votes EasterAlgorithm
- 99
  votes IncrementDecrementOperator
- 89
  votes The equals Method
- 60
  votes Comparison of integer values
- 59
  votes Logical operators
- 57
  votes Unary Operator
- 56
  votes Ternary Operator
- 56
  votes ArithmeticOperators on integer
- 56
  votes Logical Operators on Boolean values
- 49
  votes Shorthand Operators
- 41
  votes Arithmetic operators
- 38
  votes Logical Operators
- 36
  votes Assignment operators
- 36
  votes Relational operators
- 35
  votes Operator Precedence
- 35
  votes instanceOf Operator
- 30
  votes Comparing the three values with ternary operator
- 26
  votes Expression Evauation
- 24
  votes Conditional Operator
- 22
  votes Bitwise Operators
- 21
  votes Addition without using any arithmetic operator
Arithmetic
- 275
  votes PrePost Increment
- 154
  votes Arithmetic operators
- 40
  votes Overflow demonstration
- 38
  votes The arithmetic sequence program
- 36
  votes Complex Arithmetic
- 34
  votes Complex Arithmetic
- 28
  votes Trig functions in Java
- 27
  votes Reinforcement
- 27
  votes Arithmethic ASCII Table
Flow Control
- 383
  votes Switch Statement
- 305
  votes Another Switch Example
- 178
  votes Else Statement
- 89
  votes Multiple Else Statements
- 74
  votes Testing out all cases
- 70
  votes Celsius and Fahrenheit conversion
- 65
  votes If Statement
- 56
  votes Day of the Week
- 55
  votes Month from Number Using SwitchCase
- 53
  votes LetterGrade
- 45
  votes Bytes into a representation with metric units
- 39
  votes Control in a loop
- 38
  votes DIfferent Basic Kinds Of Loop
- 26
  votes IF Statement In Java.
- 26
  votes CheckYourGrades
- 24
  votes IF Conditional Statement In Java
- 6
  votes Making Decisions
Loops
- 381
  votes While loop
- 326
  votes Reinforcement
- 315
  votes Continue Statement
- 299
  votes Alphabet Looping
- 212
  votes While Loop Syntax
- 186
  votes For Loop Example
- 182
  votes MultiplicationTable
- 144
  votes even_odd_program
- 138
  votes For loop
- 132
  votes For Loop Example 2
- 125
  votes While Loop Example
- 113
  votes First Five Natural Numbers
- 103
  votes sum_of_odd_nums
- 103
  votes Do While Loop Example
- 70
  votes Fibonacci
- 68
  votes Prime Number Test
- 55
  votes pattern
- 41
  votes The Numerical for Loop
- 39
  votes break command
- 36
  votes continue command
- 29
  votes The while Loop
- 28
  votes Do While Syntax
- 24
  votes for-each Construct on Arrays
- 23
  votes Reversing and Counting Number of digits in a number
- 23
  votes Loops
- 22
  votes break & continue
Methods
- 376
  votes Static Methods
- 370
  votes Object As parameter
- 220
  votes Method Reference Example
- 77
  votes area Method example
- 68
  votes multitype arguments
- 49
  votes Calculating Square and Cube
- 46
  votes void Methods
- 37
  votes Pair of Dice
- 33
  votes Method Parameters
- 29
  votes Defining Methods
- 27
  votes Passing the Value
- 13
  votes Method Overloading Example
Arrays
- 395
  votes Accesing Arrays using For-Each Loop
- 347
  votes Copying Array Example
- 231
  votes Multi-Dimensional Array Initialization
- 203
  votes Accessing MultiDimensional Arrays
- 203
  votes Array Initialization and Sorting the array.
- 118
  votes Triangle
- 99
  votes Array Triangle Example
- 68
  votes MatrixOperations
- 59
  votes Arrays Example
- 59
  votes Average of array elements
- 53
  votes What is array?
- 51
  votes Arrays and Strings
- 38
  votes TwoD Array
- 36
  votes Accessing One Dimensional Array
- 34
  votes 2D Arrays Initialization
- 34
  votes Bubble Sort
- 31
  votes Days in a Month- In an array
- 29
  votes Array Declaration and Addition
- 26
  votes Pascals Triangle
- 25
  votes Array Copying
- 18
  votes Accessing Arrays Example
- 18
  votes Arrays and Loops
- 8
  votes Array
Strings
- 349
  votes Checking Equal Strings
- 289
  votes Palindrome String
- 267
  votes JavaStringVariables
- 224
  votes Using equalsIgnoreCase()
- 218
  votes Substituting a Character
- 193
  votes join
- 169
  votes Replacing substring with a String
- 156
  votes The compare Method
- 151
  votes Converting a Sequence of Characters
- 135
  votes String Manipulation
- 112
  votes Convert_String_To_Char_Array
- 81
  votes Splitting a String
- 79
  votes String to int and backwards
- 77
  votes The substring Method
- 77
  votes String Tokenizer
- 75
  votes Declaring Strings Example
- 74
  votes The index Of Method
- 72
  votes String Tokenizer
- 65
  votes The replace Method
- 62
  votes Upper and Lower Case
- 59
  votes Capital
- 59
  votes Use of toString()
- 59
  votes StringBuffer and related methods
- 58
  votes Longest Word
- 56
  votes StringReverse
- 55
  votes Initial
- 54
  votes String Equal Example
- 53
  votes String comparison methods
- 39
  votes Number of Vowels in a word.
- 37
  votes valueOf
- 34
  votes String
- 29
  votes String Concatenation
- 27
  votes String Concatenation
- 25
  votes trim Method
Classes
- 327
  votes Visibility of methods
- 323
  votes Multiple Constructors Example
- 241
  votes Superclass
- 219
  votes Comparing Two Objects ( Employee Example))
- 214
  votes Class Field Example
- 190
  votes visibility of variables
- 184
  votes This Example
- 130
  votes proper use of visibility in classes
- 128
  votes Classes in arrays
- 89
  votes Constructor with Parameters Example
- 73
  votes Defining and Using Java Class
- 70
  votes Calories Example
- 59
  votes Constructor
- 51
  votes Modify default constructor
- 48
  votes Writing a Class with State and Behaviour
- 40
  votes Nested classes
- 40
  votes Winning Strategy for Roullete
- 38
  votes Student class example
- 34
  votes Inheritance - Extending a Class
- 28
  votes Pizza
- 14
  votes Class with Constructor Example
Inheritance
- 345
  votes inheritance
- 87
  votes Inheritance Example
- 70
  votes Inheritance and Objects
- 47
  votes InheritanceExample
- 24
  votes Inheritance Example
Exception Handling
- 235
  votes Arithmetic exceptions
- 215
  votes NumberFormatException
- 29
  votes outOfBounds exception
Polymorphism
- 266
  votes Access Hidden Variable Example
- 251
  votes Super Example
- 65
  votes Method OverRiding Example
- 35
  votes Pure Polymorphism Example
Miscellaneous
- 90
  votes TestProject
- 77
  votes Declare Object
- 30
  votes Final Modifier in java.

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