A Simple Java Fibonacci Series Program to Calculate

In this tutorial, we’ll walk through the process of creating a simple Java Fibonacci Series to calculate the Fibonacci series. 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. For example, the Fibonacci series up to 10 terms would be: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34.

Let’s dive into the steps:

Step 1

Setting Up Your Environment Ensure that you have Java Development Kit (JDK) installed on your computer. You can download and install JDK from the official Oracle website or use a package manager if you’re on Linux.

Step 2

Creating a New Java Class Open your preferred Integrated Development Environment (IDE) or text editor. Create a new Java class named FibonacciCalculator.java.

Step 3

Writing the Java Code

public class FibonacciCalculator {
    public static void main(String[] args) {
        long n = 60; // Change this value to generate a different number of Fibonacci terms
        System.out.println("Fibonacci series up to " + n + " terms:");

    public static void generateFibonacci(long n) {
        long a = 0, b = 1;
        System.out.println(a + " ");
        for (int i = 1; i < n; i++) {
            System.out.println(b + " ");
            long sum = a + b;
            a = b;
            b = sum;

Step 4

Understanding the Code

  • Within the generateFibonacci method, we initialize two variables a and b to represent the first two numbers of the Fibonacci sequence, which are 0 and 1.
  • We print the first Fibonacci number (a) outside the loop.
  • Inside the loop, starting from the second Fibonacci number, we calculate the sum of the previous two numbers (a and b) and assign it to sum.
  • We then update a to the value of b and b to the value of sum, effectively shifting the values to calculate the next Fibonacci number.
  • This process continues iteratively until we have generated the desired number of Fibonacci terms.

Step 5

Now you can run this programm by your IDE or simpley compile the Java file by executing the following command in your terminal or command prompt:

javac FibonacciCalculator.java

Then, run the compiled program using:

java FibonacciCalculator

Step 6

Observing the Output You should see the Fibonacci series up to the specified number of terms printed in the console.

Congratulations! You’ve successfully created a Java program to calculate the Fibonacci series. Feel free to experiment with the code and explore more about Java programming.