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.

Java `

// Java program to demonstrate // of java.lang.Long.toBinaryString() method import java.lang.Math;

class Gfg1 {

// driver code
public static void main(String args[])
{

    long l = 10;
    // returns the string representation of the unsigned long value
    // represented by the argument in binary (base 2)
    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.

Java `

// Java program to demonstrate overflow // of java.lang.Long.toBinaryString() method import java.lang.Math;

class Gfg1 {

// driver code
public static void main(String args[])
{
    // conversion of a negative number to Binary
    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.

Java `

// Java program to demonstrate overflow // of java.lang.Long.toBinaryString() method import java.lang.Math;

class Gfg1 {

// driver code
public static void main(String args[])
{

    // error message thrown when a string is passed
    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.

Java `

// Java program to demonstrate overflow // of java.lang.Long.toBinaryString() method import java.lang.Math;

class Gfg1 {

// driver code
public static void main(String args[])
{

    // error message thrown when a decimal is passed
    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));