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Java Programs – Java Programming Examples with Output

Last Updated: November 28, 2022 by Chaitanya Singh | Filed Under: Java Examples

To understand a programming language you must practice the programs, this way you can learn any programming language faster. This page includes java programs on various java topics such as control statements, loops, classes & objects, functions, arrays etc. All the programs are tested and provided with the output. If you new to java and want to learn java before trying out these program, refer Java Tutorial.

Java Basic Programs

  • Java Program to Add two Numbers
  • Java Program to Check Even or Odd Number
  • How to print pattern in java
  • Java Program to add two binary numbers
  • Java Program to add two complex numbers
  • Java Program to Multiply two Numbers
  • Java Program to check Leap Year
  • Java Program to check whether input character is vowel or consonant
  • Java Program to calculate compound interest
  • Java Program to calculate simple interest
  • Java Program to find quotient and remainder
  • Java Program to calculate power of a number

Java Strings Programs

  • Java Program to Convert char to String and String to Char
  • Java Program to find duplicate characters in a String
  • Java Program to check Palindrome String using Stack, Queue, For and While loop
  • Java Program to sort strings in alphabetical order
  • Java Program to reverse words in a String
  • Java Program to perform bubble sort on Strings
  • Java program to find occurrence of a character in a String
  • Java program to count vowels and consonants in a String
  • Java Program to check two strings are anagram or not
  • Java Program to divide a string in ‘n’ equal parts
  • Java Program to find all subsets of a string
  • Java Program to find longest substring without repeating characters
  • Java Program to find longest repeating sequence in a string
  • Java Program to remove all the white spaces from a string

Java Arrays Programs

  • Program to find number of elements in an array
  • Java Program to Calculate average of numbers using Array
  • Java Program to Add the elements of an Array
  • Java Program to reverse an array
  • Java Program to sort an array in ascending order
  • Java Program to convert char Array to String
  • Java Program to Add Two Matrix Using Multi-dimensional Arrays
  • Java Program to print the elements of an array present on odd Position
  • Java Program to print the elements of an array present on even Position
  • Java Program to copy all the elements of an array into another array
  • Java Program to count the frequency of each element in an array
  • Java Program to left rotate the elements of an array
  • Java Program to right rotate the elements of an array
  • Program to find duplicate elements of an array
  • Program to find largest element of an array
  • Program to find smallest number in an array
  • Program to remove duplicate elements in an array

Java Recursion Programs

  • Java Program to Reverse a number using for, while loop and recursion
  • Java Program to check Palindrome string using Recursion
  • Java Program to Reverse a String using Recursion
  • Java Program to find Factorial of a number using Recursion

Java Programs on Numbers

  • Java Program to display first 100 prime numbers
  • Java Program to display alternate prime numbers
  • Java Program to display prime numbers between 1 and 100 or 1 and n
  • Java program to break integer into digits
  • Java Program to check Prime Number
  • Java Program to check if a given number is perfect square
  • Java Program to find square root of a number without sqrt method
  • Java Program to print Armstrong numbers between a given range
  • Java Program to Find Sum of Natural Numbers
  • Java Program to check if a number is Positive or Negative
  • Java Program to generate Random Number
  • Java Program to check Armstrong number
  • Java Program to find GCD of two numbers
  • Java Program to find Largest of three numbers
  • Java Program to swap two numbers using bitwise operator
  • Java Program to find smallest of three numbers using ternary operator
  • Java Program to find largest of three numbers using ternary operator
  • Java Program to display even numbers from 1 to n or 1 to 100
  • Java Program to display odd numbers from 1 to n or 1 to 100
  • Java Program to Find average of 3 numbers
  • Java Program to Find HCF and LCM of Two Numbers
  • Peterson Number in Java
  • Sunny Number in Java
  • Tech Number in Java
  • Emrip Number in Java
  • Autobiographical Number in Java
  • Spy number in Java
  • Neon Number in Java
  • Fascinating Number in Java
  • Automorphic Number in Java
  • Sphenic Number in Java
  • Buzz Number in Java
  • Duck Number in Java

Java Input/Output Programs

  • Java Program to read number from Standard Input
  • Java Program to Get IP Address
  • Java Program to get Input From User

Java Programs on Geometrical Calculations

  • Java Program to Calculate Area of Rectangle
  • Java Program to Calculate Area of Square
  • Java Program to Calculate the area of Triangle
  • Java Program to Calculate Area and Circumference of Circle

Java Sorting/Searching Programs

  • Java Program for bubble Sort Ascending or Descending Order
  • Java Program for Linear Search
  • Java Program for Binary Search
  • Java Program for Selection Sorting
  • Program to implement Merge Sort in Java

Java Conversion Programs

  • Java Octal to Decimal Conversion
  • Java Decimal to Octal Conversion
  • Java Hexadecimal to Decimal Conversion
  • Java Decimal to Hexadecimal Conversion
  • Java Binary to Octal Conversion
  • Java Decimal to Binary Conversion
  • Java Binary to Decimal Conversion
  • Java int to char Conversion
  • Java char to int Conversion
  • Java char to String Conversion and vice versa
  • Java long to int Conversion
  • Java int to long Conversion
  • Java int to double Conversion
  • Java double to int Conversion
  • Java Program to find ASCII value of a character
  • Java String to int Conversion
  • Java int to String Conversion
  • Java String to double Conversion
  • Java double to String Conversion
  • Java String to long Conversion
  • Java long to String Conversion
  • Java String to boolean Conversion
  • Java boolean to String Conversion
  • Java String to float Conversion
  • Java float to String Conversion
  • Java String to Object Conversion
  • Java Object to String Conversion
  • Java Date to Timestamp Conversion
  • Java Timestamp to Date Conversion
  • Java String to Date Conversion
  • Java Date to String Conversion

Other Java Programs

  • Java Program to print Floyd’s triangle
  • Java program to print Pascal triangle
  • Java Program to display Fibonacci series using loops
  • Java Program to find Factorial using loops
  • Java Program to make a calculator using switch case
  • Java Program to Calculate grades of Student
  • Java Program to perform Arithmetic Operation using Method Overloading
  • Java Program to find Area of Geometric figures using method overloading
Learn Java: Java Tutorial

Top Related Articles:

  1. Java Program for Decimal to Hexadecimal Conversion
  2. Java Program for Decimal to Octal Conversion
  3. Java Program to Add Two Complex Numbers
  4. Java program to print number of elements in an array
  5. Java program to check prime number

About the Author

I have 15 years of experience in the IT industry, working with renowned multinational corporations. Additionally, I have dedicated over a decade to teaching, allowing me to refine my skills in delivering information in a simple and easily understandable manner.

– Chaitanya

Comments

  1. manisha says

    December 6, 2017 at 11:39 AM

    i need some case studies on java programming

    Reply
  2. Alee says

    January 11, 2018 at 12:37 PM

    A very beautiful and well suited website —–> beginnersbook.com ;-)

    Reply
  3. crystal says

    February 18, 2018 at 4:12 PM

    what is the error in this program

    class p3
    {
    public static void main(int age)
    {
    if(age>=18)
    {
    system.out.println(“eligible for election”);
    }
    else
    {
    system.out.println(“not eligible for election”);
    }
    }

    Reply
    • Quirkygeek says

      November 3, 2018 at 2:15 PM

      A function doesn’t contain a main method

      Reply
    • pratham programmer says

      November 11, 2018 at 2:22 PM

      your s should not be small in the statement “system. out. print…” . It should be capital S

      Reply
    • Arpita Mandal says

      November 21, 2018 at 9:35 AM

      Hey..there is a syntax error in your program!

      The “s” of “system” must be in caps…that is,
      It should be —
      System.out.println(“eligible…”);

      I hope it helps!!

      Reply
    • Shravya says

      December 9, 2018 at 6:01 AM

      } bracket error
      Last } bracket are required

      Reply
    • Shweta says

      December 20, 2018 at 3:54 AM

      You can’t pass any argument in main method

      Reply
      • Vamshi Krishna says

        July 28, 2019 at 5:42 AM

        actually we can, they’re called as “command line arguments”

        Reply
      • Ram panwar says

        September 10, 2019 at 3:33 PM

        Yes we can pass argument in main function using command line argument..as a string

        Reply
      • Deepak Kumar says

        May 11, 2020 at 1:59 AM

        You can pass arguments in main method but only as String…..

        Reply
    • priya says

      December 26, 2018 at 9:55 AM

      public static void main(String []args) will come instead of public Static void main(int age)

      Reply
    • Isuru Harischandra says

      December 18, 2019 at 9:19 AM

      “int age” should be “String[] args” / “String args[]” / “String[] arg” / “String arg[]”

      Reply
    • Mohit Tyagi says

      June 25, 2020 at 5:27 AM

      Four mistakes:

      1. main method should have String []args as arguments instead of age. Use public static void main(String args[])
      2. age should be declared as a variable before using. Use int age=10;
      3. System.out.println instead of system.out.println.
      4.Closing bracket fro class p3 missing. Use } at last.

      Reply
    • geojeet tom says

      September 30, 2021 at 12:13 PM

      haven’t put the third closed curly brackets

      Reply
    • sudhan says

      October 29, 2021 at 12:16 PM

      Give System.out.print
      And close curly braces at end

      Reply
    • Bhanu pratap singh yadav says

      January 31, 2022 at 10:28 AM

      main function arguments are (String[] args)

      Reply
  4. Travis says

    April 19, 2018 at 7:49 PM

    best java tutorial examples ever

    Reply
  5. Sindhu says

    May 5, 2018 at 7:37 AM

    This page is awesome For beginners…it is very helpful…give me example programs which will be useful for real time projects

    Reply
  6. Sheldon says

    May 8, 2018 at 1:04 AM

    How can I take an array for example five separate words and place them on separate lines evenly using astericks to make up the number on both ends in relation to the number entered by the user? Is a program to do this possible?

    Reply
  7. Anil says

    August 8, 2018 at 5:42 AM

    console application that receives any size of matrix and one parameter which is the Manhattan distance, this is K.

    The result should be Yes/No. Yes if there are any two similar items (integers) in the matrix that are in a distance of K from each other or less.

    Input: 1. Number of rows. 2. Matrix rows one line after the other in a new line between each matrix line. 3. K value. Output YES/NO Here is a sample for an input and output:

    Reply
  8. deepika says

    August 21, 2018 at 6:19 AM

    can you kindly provide program for the following
    java a program to create an array of 10 integers. Accept values from the user in that array. Input another number from the user and find out how many numbers are equal to the number passed, how many are greater and how many are less than the number passed.

    Reply
  9. Nikhil Satpute says

    August 31, 2018 at 3:07 PM

    # Suppose 450 is 3 digit number ….So 3 is its digit length. In that way calculate 5 digit random number ….do not run by using range ….get random number using length itself

    Reply
  10. elham says

    August 31, 2018 at 11:35 PM

    How to convert char to numeric value

    Reply
    • Arash says

      October 31, 2018 at 3:32 PM

      first U convert char to String with the method String s = String.valueof(char c), after this U convert String to numeric num like integer with Integer.parseint(String s)

      Reply
    • Chaitanya Singh says

      April 9, 2019 at 11:33 AM

      You can refer this article: Java char to int conversion.

      Reply
      • Priyanka says

        July 19, 2020 at 9:36 AM

        Chaitanya , your posts are awesome 😊

        Reply
  11. Muqtasid khan says

    September 2, 2018 at 2:03 PM

    Write a program to accept the length of and breath of a rectangle using scanner class and display its area and perimeter

    Reply
  12. anisha garg says

    December 5, 2018 at 3:42 PM

    can you please write a code on below question of complex number ??

    Print the sum, difference and product of two complex numbers by creating a class named ‘Complex’ with separate methods for each operation whose real and imaginary parts are entered by user.

    Reply
  13. gausmohammad says

    December 17, 2018 at 2:51 AM

    please add more programs like matrix all operation and no. of time vowels occurrence in a string

    Reply
  14. Spandan says

    December 17, 2018 at 1:23 PM

    54321
    4321
    321
    21
    1 Write the structure of the program using for loop

    Reply
  15. DWAIPAYAN DUTTA says

    January 30, 2019 at 3:18 PM

    X!/10+(X+2)!/15+(X+4)!/20+………n plz solve this.

    Reply
  16. GESII LEIBOR says

    February 6, 2019 at 2:24 PM

    Write java program to find if a name exists in a list of names.The program should display how many times the name occurs in the list.The program should have at least two instance methods.

    Reply
  17. Siva kumar Nebarti says

    September 20, 2019 at 3:42 PM

    Hi where can i get real time example programs such as
    1 find out the no of persons in a room
    2 Find the electricity bill for one month

    Reply
    • Chaitanya Singh says

      July 20, 2020 at 1:31 PM

      I will upload these programs soon.

      Reply
  18. Sachintha says

    September 20, 2019 at 5:17 PM

    I am new to java and I hope this beginnersbook.com would be very helpful to me. I am gonna start learning Java. Thank you very much.

    Reply
  19. Mohit Saini says

    September 30, 2019 at 12:20 AM

    Very Well explained examples….. exact answers that are asked in interviews

    Reply
  20. Sujith says

    December 18, 2019 at 5:34 PM

    Program for password it must contain one upper case and lower case and number and size of password 8-15

    Reply
  21. Anto says

    April 22, 2020 at 1:44 PM

    What “System.out.println(“”)” means?

    Please reply

    Reply
    • Rakesh Gurung says

      October 24, 2021 at 10:39 AM

      If we type
      System.out.println(“This is java”);
      This will display the output :This is java
      where as if you are taking about just the statement
      System.out.println(“”);
      Then it will print the blank or space in console

      Reply

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Java Examples

  • Check Odd-even
  • Linear Search
  • Binary Search
  • Floyd's Triangle
  • Reverse number
  • Random Number
  • first n prime numbers
  • Disp prime Numbers
  • Check Prime number
  • Palindrome String
  • Find factorial
  • Sum of elements of Array
  • Area of rectangle
  • Area of Square
  • Area of Triangle
  • Circle

Tutorials

  • Java Tutorial
  • OOPs Concepts
  • Java String
  • Exception handling
  • Java Multithreading
  • Java I/O
  • Java Serialization
  • Java Regex
  • Java AWT
  • Java Swing
  • Java Enum
  • Java Annotations

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