Java Long toOctalString Method with Examples

In this article, we will learn how to use the java.lang.Long.toOctalString() method in Java. The java.lang.Long.toOctalString() method returns a string representation of the long argument as an unsigned integer in base 8.

Java.lang.Long.toOctalString() method

The java.lang.Long.toOctalString() method converts a given long value into its octal (base-8) string representation. It returns a string that represents the numerical value in octal format. This method is useful when you need to display or work with numbers in octal form.

Steps to convert a long to an octal string

The following are the steps to convert a long to an octal string

Step 1. Declare and Initialize the Long Variable:

•  Declare a long variable and assign a value to it.

Step 2. Convert and Print the Octal Representation:

• Use the Long.toOctalString() method to convert the long value to an octal string.

Java program to convert a long value to an octal string

The following is an example of converting a long value to an octal string

import java.lang.*;
public class Main {
   public static void main(String[] args) {
      long l = 220;
      System.out.println("Number = " + l);
      /* returns the string representation of the unsigned long value
      represented by the argument in Octal (base 8) */
      System.out.println("Octal = " + Long.toOctalString(l));
   }
}

Output

Number = 220
Octal = 334

Java program for a negative long value

The following is an example of a Java program for a negative long value.

import java.lang.*;
public class Main {
   public static void main(String[] args) {
      long l = -55;
      System.out.println("Number = " + l);
      System.out.println("Octal = " + Long.toOctalString(l));
   }
}

Output

Number = -55
Octal = 1777777777777777777711

Code Explanation

The Long.toOctalString() method takes a long value and returns its octal (base 8) string representation. For example, when 220 is passed, it converts to "334". When -55 is passed, the method returns "1777777777777777777711", which is the two's complement representation of the negative number in octal.