Java lang Long.toOctalString() Method with Examples
Last Updated :
19 Nov, 2020
The Java.lang.Long.toOctalString() function is a built-in function in Java that returns a string representation of the long argument as an unsigned integer in base 8.
Syntax:
public static int toOctalString(long num)
Parameters: The function accepts a single mandatory parameter num, which is to be converted to a string. The parameter is of
long data-type.
Returns: The function returns a string representation of the long argument as an unsigned integer in base 8.
Examples:
Input : 16
Output : 20
Input : 1234
Output : 2322
Program to demonstrate the working of function:
Java
// Java program to demonstrate working
// of java.lang.Long.toOctalString() method
import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
long l = 16;
// returns the string representation of the unsigned int value
// represented by the argument in octal (base 8)
System.out.println("Octal string is " + Long.toOctalString(l));
l = 1234;
System.out.println("Octal string is " + Long.toOctalString(l));
}
}
Output:
Octal string is 20
Octal string is 2322
Program 2: The program below demonstrates the working function when a negative number is passed.
Java
// Java program to demonstrate
// of java.lang.Long.toOctalString() method
// negative number
import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
// when negative number is passed
System.out.println("Hex is " + Long.toOctalString(-14));
}
}
Output:
Hex is 1777777777777777777762
Errors and Exception: 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
// of java.lang.Long.toOctalString() method
// string number
import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
// when string number is passed
System.out.println("Hex is " + Long.toOctalString("14"));
}
}
Output:
prog.java:13: error: incompatible types: String cannot be converted to long
System.out.println("Hex is " + Long.toOctalString("14"));
Program 4: The program below demonstrates the working function when a decimal is passed.
Java
// Java program to demonstrate
// of java.lang.Long.toOctalString() method
// decimal number
import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
// when decimal number is passed
System.out.println("Hex is " + Long.toOctalString(15.67));
}
}
Output:
prog.java:13: error: incompatible types: possible lossy conversion from double to long
System.out.println("Hex is " + Long.toOctalString(15.67));