Java lang.Long.toBinaryString() method with Examples (original) (raw)

Last Updated : 05 Dec, 2018

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

Syntax:

public static String toBinaryString(long num)

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

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

Examples:

Input : 10 Output : 1010

Input : 9 Output : 1001

Program 1 : The program below demonstrates the working of function.

import java.lang.Math;

class Gfg1 {

`` public static void main(String args[])

`` {

`` long l = 10 ;

`` System.out.println( "Binary is " + Long.toBinaryString(l));

`` l = 20987752 ;

`` System.out.println( "Binary is " + Long.toBinaryString(l));

`` }

}

Output:

Binary is 1010 Binary is 1010000000011111101101000

Program 2: The program below demonstrates the working function when a negative number is passed.

import java.lang.Math;

class Gfg1 {

`` public static void main(String args[])

`` {

`` long l = - 13 ;

`` System.out.println( "Binary is " + Long.toBinaryString(l));

`` }

}

Output:

Binary is 1111111111111111111111111111111111111111111111111111111111110011

Errors and Exceptions: Whenever a decimal number or a string is passed as an argument, it returns an error message which says “incompatible types”.

Program 3: The program below demonstrates the working function when a string number is passed.

import java.lang.Math;

class Gfg1 {

`` public static void main(String args[])

`` {

`` System.out.println( "Binary is " + Long.toBinaryString( "10" ));

`` }

}

Output:

prog.java:12: error: incompatible types: String cannot be converted to long System.out.println("Binary is " + Long.toBinaryString("10"));

Program 4: The program below demonstrates the working function when a decimal is passed.

import java.lang.Math;

class Gfg1 {

`` public static void main(String args[])

`` {

`` System.out.println( "Binary is " + Long.toBinaryString( 10.25 ));

`` }

}

Output:

prog.java:12: error: incompatible types: possible lossy conversion from double to long System.out.println("Binary is " + Long.toBinaryString(10.25));