Java Convert Octal to Decimal

In this source code example, we will write a Java program that converts any Octal number to a Decimal number.
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Java Convert Octal to Decimal

This class converts any Octal number to a Decimal number:
package net.sourcecodeexamples.java.Conversions; import java.util.Scanner; /**  * Converts any Octal Number to a Decimal Number  *   * @author sourcecodeexamples.net  *  */ public class OctalToDecimal { /**  * Main method  *   * @param args Command line arguments  */ public static void main(String args[]) { try (Scanner sc = new Scanner(System.in)) { System.out.print("Octal Input: "); String inputOctal = sc.nextLine(); int result = convertOctalToDecimal(inputOctal); if (result != -1) System.out.println("Result convertOctalToDecimal : " + result); } } /**  * This method converts an octal number to a decimal number.  *   * @param inputOctal The octal number  * @return The decimal number  */ public static int convertOctalToDecimal(String inputOctal) { try { // Actual conversion of Octal to Decimal: Integer outputDecimal = Integer.parseInt(inputOctal, 8); return outputDecimal; } catch (NumberFormatException ne) { // Printing a warning message if the input is not a valid octal // number: System.out.println("Invalid Input, Expecting octal number 0-7"); return -1; } } }

Output

Octal Input: 121 Result convertOctalToDecimal : 81
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