Java lang.Long.toBinaryString() method with Examples
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));