# How do I convert decimal to octal?

From the code snippet below you will learn how to convert decimal to an octal string and converting back from a string of octal number to decimal. For the first conversion we can utilize the `Integer.toOctalString()` method. This method takes an integer number and will return the string that represent the corresponding octal number.

To convert back from octal string to decimal number we can use the `Integer.parseInt()` method. Which require two parameter, a string that represent an octal number, and the radix which is `8` from octal number.

``````package org.kodejava.lang;

public class IntegerToOctalExample {
public static void main(String[] args) {
int integer = 1024;
// Converting integer value to octal string representation.
String octal = Integer.toOctalString(integer);
System.out.printf("Octal value of %d is '%s'.\n", integer, octal);

// Now we converting back from octal string to integer
// by calling Integer.parseInt and passing 8 as the radix.
int original = Integer.parseInt(octal, 8);
System.out.printf("Integer value of octal '%s' is %d.%n", octal, original);

// When for formatting purposes we can actually use printf
// or String.format to display an integer value in other
// format (o = octal, h = hexadecimal).
System.out.printf("Octal value of %1\$d is '%1\$o'.\n", integer);
}
}
``````

Here is the result of our program.

``````Octal value of 1024 is '2000'.
Integer value of octal '2000' is 1024.
Octal value of 1024 is '2000'.
``````

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