Example: Octal to Decimal (Built-in) in Java

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// Octal to Decimal (Built-in)
import java.util.Scanner;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Step 1: Prompt user for an octal number as a string
        System.out.print("Enter an octal number: ");
        String octalString = scanner.next();

        // Step 2: Use Integer.parseInt() with radix 8
        // The second argument '8' specifies that the input string is an octal number.
        int decimalNumber = Integer.parseInt(octalString, 8);

        // Step 3: Display the result
        System.out.println("Decimal equivalent: " + decimalNumber);

        scanner.close();
    }
}