Example Of Java Programming Language

Q: How do I write my first Java program?

Start with a basic "Hello, World!" program to understand the syntax and basic Input-output operations. After that slowly move to the advanced topics. Do ensure that you are well familiar with all the essential theoretical concepts before writing programs.

Q: Why Conditions and loops are used in Java?

Conditions and loops in Java control program flow and automate repetitive tasks. Conditions, like if-else statements, make decisions based on specified conditions, executing code blocks accordingly. Loops which include- for, while, do-while repeat code until conditions are met, are useful for iterating over data structures.

Q: What is multithreading in Java?

Multithreading allows concurrent execution of tasks within a single program, this helps in improving the performance and responsiveness of a program by utilizing multiple threads of execution.

Example of Java programming language: Java is one of the most popular programming languages, known for its Flexibility and easy-to-use syntax. Whether you’re just starting out or looking to sharpen your skills, understanding Java through practical examples is a great way to learn.

This article breaks down complex concepts into simple, easy-to-understand examples that will help you to learn the essentials of Java programming. From basic syntax to advanced features, you’ll find clear explanations and hands-on examples that make learning Java enjoyable and effective. Read further and discover how Java can solve plenty of problems in your coding journey.

Table of Contents

What Is Java?

Java is a popular programming language used by millions of developers around the world. It is known for its easy-to-write syntax and flexibility, as it can be used to create a wide variety of applications, from mobile apps to web servers and video games, making it a great choice for beginners.

One of its key features is that it runs on the Java Virtual Machine (JVM), which allows Java programs to run on any device that has the JVM installed, making it highly portable. Java’s syntax is straightforward and similar to English, which helps new programmers understand and write code more easily.

Why Learning Java Is Important?

By learning Java, you can gain a valuable skill set that can help you succeed in various programming and development fields because it is a foundational skill in the world of programming. Here are a few reasons why learning java is important for you:

Flexibility: In today’s modern world, Java is used in a wide range of applications, from web development to mobile apps and even large-scale enterprise systems. This flexibility means that learning Java opens up many career opportunities for your future.
Platform Independence: Java programs can run on any device with the Java Virtual Machine (JVM), making it a highly portable language. This means you can develop applications that work on different operating systems without modification.
Strong Community Support: Java has a large, active community of developers who contribute to its regular development and provide support through forums, tutorials, and libraries. This makes it easier to find help and resources when learning and working with Java.
High Demand: Many companies and organizations works on Java, leading to a high demand for skilled Java developers. Learning Java can enhance your job chances and career growth.
Foundation for Other Languages: Java’s syntax and concepts are similar to many other programming languages. Learning Java can make it easier to pick up other languages in the future.

Example Of Java Programming Language

Understanding example of Java programming language is like learning through practical implementations. Instead of just reading about Java, examples help you to apply theoretically learned concepts in the real-world scenarios. Consider each example as a practical guide that will help you clear all your concepts and will make you a proficient programmer.

Here are the basic example of Java Programming Language, that we will cover in this article to help you understand Java better.

Example Of Java Programming Language

1) Fibonacci Series in Java

2) Prime Number Program in Java

3) Palindrome Program in Java

4) Factorial Program in Java

5) Java Program to print the largest element in an array

6) Java Program to sort the elements of an array in ascending order

7) Java Program to count the total number of characters in a string

8) Java Program to divide a string in ‘N’ equal parts.

9) Java Program to Make a Simple Calculator

10) Java Code To Create Pyramid and Pattern

1. Fibonacci Series In Java

The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones, usually starting with 0 and 1. In this example, we will write a simple Java program to generate the Fibonacci series up to a certain number of terms. This code will help you understand how to use loops and basic arithmetic operations in Java to create this famous sequence.

Fibonacci Series Example Of Java Programming Language

public class FibonacciSeries {

public static void main(String[] args) {

int n = 10; // number of terms to display

int firstTerm = 0, secondTerm = 1;

System.out.println(“Fibonacci Series up to ” + n + ” terms:”);

for (int i = 1; i <= n; ++i) {

System.out.print(firstTerm + ” “);

// compute the next term

int nextTerm = firstTerm + secondTerm;

firstTerm = secondTerm;

secondTerm = nextTerm;

}

Output-

Fibonacci Series up to 10 terms:

0 1 1 2 3 5 8 13 21 34

In this code, we are generating the Fibonacci series up to a specified number of terms, which is set to 10. We start with the first two terms of the series, 0 and 1. Using a `for` loop, we print each term of the series. In each loop iteration, we calculate the next term by adding the previous two terms together. We then update the values of the terms to move forward in the series. This process continues until we have printed the desired number of terms in the Fibonacci sequence.

2) Prime Number Program in Java

This example of Java programming checks if a given number is a prime number. In this program, we take a number as input and then determine if it has only two divisors: 1 and itself. If the number meets this condition, it is considered prime; otherwise, it is not.

Prime Number Example Of Java Programming Language

import java.util.Scanner;

public class PrimeNumberExample {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print(“Enter a number: “);

int number = scanner.nextInt();

scanner.close();

boolean isPrime = true;

if (number <= 1) {

isPrime = false;

} else {

for (int i = 2; i <= Math.sqrt(number); i++) {

if (number % i == 0) {

isPrime = false;

break;

}

if (isPrime) {

System.out.println(number + ” is a prime number.”);

} else {

System.out.println(number + ” is not a prime number.”);

}

Output-

Enter a number: 17

17 is a prime number.

In this program, we first ask the user to enter a number. We then check if the number is less than or equal to 1, which cannot be prime. If it is greater than 1, we use a loop to check divisibility from 2 up to the square root of the number. If the number is divisible by any integer in this range (other than 1 and itself), it is not prime. If no divisors are found, the number is prime.

3) Palindrome Program in Java

The Palindrome Program in Java checks whether a given string reads the same from backward as well as forward. This program takes a string input from the user, removes spaces and converts all characters to lowercase to ensuring case insensitivity. It then compares the original string with its reverse to determine if it is a palindrome. If both the original and the reversed string matches it prints that the given string is a palindrome.

Palindrome Program Example Of Java Programming Language

import java.util.Scanner;

public class PalindromeExample {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print(“Enter a string: “);

String originalString = scanner.nextLine();

scanner.close();

// Removing spaces and converting to lowercase

String processedString = originalString.replaceAll(“\\s+”, “”).toLowerCase();

// Reversing the string

StringBuilder reversedString = new StringBuilder(processedString);

reversedString.reverse();

// Checking if the original and reversed strings are equal

if (processedString.equals(reversedString.toString())) {

System.out.println(originalString + ” is a palindrome.”);

} else {

System.out.println(originalString + ” is not a palindrome.”);

}

Output-

Enter a string: Malayalam

Malayalam is a palindrome.

4) Factorial Program in Java

In this factorial program written in Java, we aim to calculate the factorial of a given number. The factorial of a non-negative integer is the product of all positive integers less than or equal to that integer. For example, the factorial of 5 is calculated as ( 5 *4*3*2*1 = 120 ).

Below is a simple Java code snippet that computes the factorial of a number entered by the user:

Factorial Program Example Of Java Programming Language

import java.util.Scanner;

public class FactorialExample {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print(“Enter a number: “);

int number = scanner.nextInt();

int factorial = 1;

for (int i = 1; i <= number; i++) {

factorial *= i;

}

System.out.println(“Factorial of ” + number + ” is: ” + factorial);

scanner.close();

}

Output-

Enter a number: 8

Factorial of 5 is: 40,320

In this example, the user inputs a number like 8 in this case, and the program calculates its factorial using a `for` loop. The result is then displayed on the screen, showing the factorial of the input number.

5) Java Program To Print The Largest Element In An Array

In this Java program, our aim is to find the largest element in an array of integers. The program iterates through each element of the array, compares it with a variable that stores the current maximum value found, and updates this variable if a larger element is encountered. Finally, it prints out the largest element found in the array.

Example Of Java Programming Language To Print The Largest Element In An Array

public class LargestElementInArray {

public static void main(String[] args) {

// Sample array

int[] array = {10, 4, 7, 25, 16};

// Initialize max with the first element of the array

int max = array[0];

// Iterate through the array to find the largest element

for (int i = 1; i < array.length; i++) {

if (array[i] > max) {

max = array[i];

}

// Print the largest element found

System.out.println(“The largest element in the array is: ” + max);

}

Output-

The largest element in the array is: 25

6) Java Program To Sort The Elements Of An Array In Ascending Order

This Java program sorts the elements of an array in ascending order using the bubble sort algorithm. Bubble sort works by repeatedly stepping through the list, comparing adjacent elements, and swapping them if they are in the wrong order. This process is repeated until the array is sorted in ascending order.

Example Of Java Programming Language To Sort The Array Elements

public class ArraySortExample {

public static void main(String[] args) {

int[] array = {5, 2, 8, 1, 3};

int temp;

System.out.println(“Original Array:”);

for (int i = 0; i < array.length; i++) {

System.out.print(array[i] + ” “);

}

System.out.println();

// Sorting array in ascending order using bubble sort

for (int i = 0; i < array.length – 1; i++) {

for (int j = 0; j < array.length – 1 – i; j++) {

if (array[j] > array[j + 1]) {

// swap elements

temp = array[j];

array[j] = array[j + 1];

array[j + 1] = temp;

}

System.out.println(“Sorted Array in Ascending Order:”);

for (int i = 0; i < array.length; i++) {

System.out.print(array[i] + ” “);

}

Output-

Original Array:

5 2 8 1 3

Sorted Array in Ascending Order:

1 2 3 5 8

7) Java Program To Count The Total Number Of Characters In A String

In this Java program, we aim to count the total number of characters in a given string. The program takes a string input from the user, iterates through each character in the string, and counts how many characters are present. It then prints out the total count of characters to the user. This example demonstrates a basic use of loops and string manipulation in Java.

Example Of Java Programming Language To Count The Total Number Of Characters

import java.util.Scanner;

public class CharacterCount {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print(“Enter a string: “);

String inputString = scanner.nextLine();

// Initialize count variable to store the count of characters

int count = 0;

// Iterate through each character in the string

for (int i = 0; i < inputString.length(); i++) {

// Increment count for each character encountered

count++;

}

// Print the total number of characters in the string

System.out.println(“Total number of characters: ” + count);

scanner.close();

}

Output-

Enter a string: Hello, World!

Total number of characters: 13

8) Java Program To Divide A String In ‘N’ Equal Parts

To divide a string into ‘N’ equal parts in Java, we can create a program that takes a string input and divides it into specified parts evenly. The program calculates the length of the string and determines the size of each part based on the total length divided by ‘N’. It then iterates through the string, slicing it into equal segments and storing each segment in an array.

Example Of Java Programming Language To Divide String into N equal parts.

public class DivideString {

public static void main(String[] args) {

String str = “HelloMyNameIsSahil”;

int parts = 3;

// Calculate the length of the string

int length = str.length();

// Calculate the size of each part

int divide = length / parts;

int startIndex = 0;

String[] result = new String[parts];

// Divide the string into ‘N’ equal parts

for (int i = 0; i < parts; i++) {

if (startIndex < length) {

// Get the substring for the current part

result[i] = str.substring(startIndex, startIndex + divide);

startIndex += divide;

}

// Display the divided parts

for (String part : result) {

System.out.println(part);

}

Output-

Hel

Lom

Yna

Mei

Ssa

Hil

9. Java Program To Make A Simple Calculator

In this program, our aim is to create a simple calculator in Java that can perform basic arithmetic operations like subtraction, addition, multiplication, and division. The program will ask the user to enter two numbers and choose an operation. Based on the user’s input, the calculator will perform the selected operation and display the result. This example will help beginners understand how to take user input, use conditional statements to determine the operation, and perform arithmetic calculations in Java.

Example Of Java Programming Language To Make A Simple Calculator

import java.util.Scanner;

public class SimpleCalculator {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

// Ask user to enter two numbers

System.out.print(“Enter first number: “);

double num1 = scanner.nextDouble();

System.out.print(“Enter second number: “);

double num2 = scanner.nextDouble();

// Ask user to choose an operation

System.out.println(“Choose an operation: +, -, *, /”);

char operation = scanner.next().charAt(0);

double result;

// Perform the chosen operation

switch (operation) {

case ‘+’:

result = num1 + num2;

break;

case ‘-‘:

result = num1 – num2;

break;

case ‘*’:

result = num1 * num2;

break;

case ‘/’:

// Handle division by zero

if (num2 != 0) {

result = num1 / num2;

} else {

System.out.println(“Error! Division by zero is not allowed.”);

return;

}

break;

default:

System.out.println(“Error! Invalid operation.”);

return;

}

// Display the result

System.out.println(“The result is: ” + result);

}

Output-

Enter first number: 10

Enter second number: 5

Choose an operation: +, -, *, /

The result is: 15.0

Enter first number: 10

Enter second number: 0

Choose an operation: +, -, *, /

Error! Division by zero is not allowed.

Enter first number: 10

Enter second number: 5

Choose an operation: +, -, *, /

Error! Invalid operation.

10. Java Code To Create Pyramid And Pattern

In this Java program, The following Java code shows how to create a pyramid pattern using nested loops. In this example, we use two nested loops: one for handling the rows and another for printing spaces and asterisks to form the pyramid shape. As the number of rows increases, the number of asterisks also increases, forming a classic pyramid pattern.

Example In Java Programming To Create Pyramid Pattern Using *

public class PyramidPattern {

public static void main(String[] args) {

int rows = 5; // Number of rows in the pyramid

for (int i = 1; i <= rows; i++) {

// Print spaces

for (int j = i; j < rows; j++) {

System.out.print(” “);

}

// Print stars

for (int k = 1; k <= (2 * i – 1); k++) {

System.out.print(“*”);

}

// Move to the next line

System.out.println();

}

Output-

***

*****

*******

*********

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Example Of Java Programming Language FAQs

How do I write my first Java program?

Start with a basic "Hello, World!" program to understand the syntax and basic Input-output operations. After that slowly move to the advanced topics. Do ensure that you are well familiar with all the essential theoretical concepts before writing programs.

Why Conditions and loops are used in Java?

Conditions and loops in Java control program flow and automate repetitive tasks. Conditions, like if-else statements, make decisions based on specified conditions, executing code blocks accordingly. Loops which include- for, while, do-while repeat code until conditions are met, are useful for iterating over data structures.

What is multithreading in Java?

Multithreading allows concurrent execution of tasks within a single program, this helps in improving the performance and responsiveness of a program by utilizing multiple threads of execution.