Java lang.Integer.toBinaryString() method

The java.lang.Integer.toBinaryString() method returns a string representation of the integer argument as an unsigned integer in base 2. It accepts an argument in Int data-type and returns the corresponding binary string.


public static String toBinaryString(int num)

Parameter : The function accepts a single mandatory parameter num 
num - This parameter specifies the number to be converted to binary string. 
It is of int data-type 

Return Value: This function returns the string representation of the unsigned Integer value represented by the argument in binary (base 2).

Input : 10 
Output : 1010 

Input : 9
Output : 1001 




// Java program to demonstrate
// java.lang.Integer.toBinaryString() method
import java.lang.Math;
class Gfg1 {
    // driver code
    public static void main(String args[])
        int l = 10;
        // returns the string representation of the unsigned int value
        // represented by the argument in binary (base 2)
        System.out.println("Binary is " + Integer.toBinaryString(l));
        l = 9;
        System.out.println("Binary is " + Integer.toBinaryString(l));



Binary is 1010
Binary is 1001

Attention reader! Don’t stop learning now. Get hold of all the important Java and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up

The function of education is to teach one to think intensively and to think critically

If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.