Java Guava | isPowerOfTwo() method IntMath Class
Last Updated :
23 Jan, 2019
The isPowerOfTwo() method of Guava’s IntMath class is used to check if a number is power of two or not. It accepts the number to be checked as a parameter and return boolean value true or false based on whether the number is a power of 2 or not.
Syntax :
public static boolean isPowerOfTwo(int x)
Parameter: This method accepts a single parameter x which of integer type.
Return Value : The method returns true if x represents power of 2 and false if x doesn’t represent power of 2.
Exceptions : The method doesn’t have any exception.
Note : This differs from Integer.bitCount(x) == 1, because Integer.bitCount(Integer.MIN_VALUE) == 1, but Integer.MIN_VALUE is not a power of two.
Example 1 :
import java.math.RoundingMode;
import com.google.common.math.IntMath;
class GFG {
public static void main(String args[])
{
int a1 = 63 ;
if (IntMath.isPowerOfTwo(a1))
System.out.println(a1 + " is power of 2" );
else
System.out.println(a1 + " is not power of 2" );
int a2 = 1024 ;
if (IntMath.isPowerOfTwo(a2))
System.out.println(a2 + " is power of 2" );
else
System.out.println(a2 + " is not power of 2" );
}
}
|
Output :
63 is not power of 2
1024 is power of 2
Example 2 :
import java.math.RoundingMode;
import com.google.common.math.IntMath;
class GFG {
public static void main(String args[])
{
int a1 = 10 ;
if (IntMath.isPowerOfTwo(a1))
System.out.println(a1 + " is power of 2" );
else
System.out.println(a1 + " is not power of 2" );
int a2 = 256 ;
if (IntMath.isPowerOfTwo(a2))
System.out.println(a2 + " is power of 2" );
else
System.out.println(a2 + " is not power of 2" );
}
}
|
Output :
10 is not power of 2
256 is power of 2
Reference :
https://google.github.io/guava/releases/20.0/api/docs/com/google/common/math/IntMath.html#isPowerOfTwo-int-
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