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Java Long toOctalString() Method

Java toOctalString() method is the part of the Long class of the java.lang package. This method is used to return the octal equivalent of the base 8 of the value passed as an unsigned long as a String.The unsigned long value is the argument plus 2^64 if the argument is negative; otherwise, it is equal to the argument. This value is converted to a string of ASCII digits in octal (base 8) with no extra leading 0s.


public static String toOctalString (long i)  


The parameter passed is the long value of which the string representation of the equivalent octal of base 8 is to be returned.


Returns the String representation of the parameter passed as equivalent base 8 octal value.

Example 1:

Here, a positive and a negative number is taken for a better understanding of the method.

import java.lang.Long;

public class StudyTonight
    public static void main(String[] args) 
        long i = 284L; 
        long j = -56L;
        System.out.println("Actual number is = " + i);  
        System.out.println("Octal equivalent is = " + Long.toOctalString(i));//returns the long value in octal base 8 as a string
        System.out.println("Actual number is = " + j);  
        System.out.println("Octal equivalent is = " + Long.toOctalString(j)); //returns the long value in octal base 8 as a string

Actual number is = 284
Octal equivalent is = 434
Actual number is = -56
Octal equivalent is = 1777777777777777777710

Example 2:

Here is a user-defined example where anyone using this code can put a value of his choice and get the equivalent output.

import java.util.Scanner;  

public class StudyTonight
	public static void main(String[] args) 
			System.out.print("Enter the Number = ");  
			Scanner sc = new Scanner(;  
			long i = sc.nextLong();  
			System.out.println("Actual Number is  = " + i);  
			System.out.println("Octal representation is = " + Long.toOctalString(i)); //returns the long value in octal base 8 as a string 
		catch(Exception e)
			System.out.println("Invalid Number");

Enter the Number = 933
Actual Number is = 933
Octal representation is = 1645
Enter the Number = -794
Actual Number is = -794
Octal representation is = 1777777777777777776346
Enter the Number = 0x445
Invalid Number

Live Example:

Here, you can test the live code example. You can execute the example for different values, even can edit and write your examples to test the Java code.

About the author:
A Computer Science and Engineering Graduate(2016-2020) from JSSATE Noida. JAVA is Love. Sincerely Followed Sachin Tendulkar as a child, M S Dhoni as a teenager, and Virat Kohli as an adult.