The method isPowerOfTwo(long x) of Guava’s LongMath 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(long x)
Parameter: This method accepts a single parameter x which is of long type which is to be checked for power of two.
Return Value: This method returns a boolean value. It returns true if x represents power of 2 and false if x doesn’t represent power of 2.
Exceptions: The method doesn’t throw any exception.
Note: This differs from Long.bitCount(x) == 1, because Long.bitCount(Long.MIN_VALUE) == 1, but Long.MIN_VALUE is not a power of two.
Example 1 :
// Java code to show implementation of// isPowerOfTwo(long x) method of Guava's// LongMath class import java.math.RoundingMode;import com.google.common.math.LongMath; class GFG { // Driver code public static void main(String args[]) { long n1 = 52; // Using isPowerOfTwo(long x) method // of Guava's LongMath class if (LongMath.isPowerOfTwo(n1)) System.out.println(n1 + " is power of 2"); else System.out.println(n1 + " is not power of 2"); long n2 = 4; // Using isPowerOfTwo(long x) method // of Guava's LongMath class if (LongMath.isPowerOfTwo(n2)) System.out.println(n2 + " is power of 2"); else System.out.println(n2 + " is not power of 2"); }} |
Output:
52 is not power of 2 4 is power of 2
Example 2:
// Java code to show implementation of// isPowerOfTwo(long x) method of Guava's// LongMath class import java.math.RoundingMode;import com.google.common.math.LongMath; class GFG { // Driver code public static void main(String args[]) { long n1 = 256; // Using isPowerOfTwo(long x) method // of Guava's LongMath class if (LongMath.isPowerOfTwo(n1)) System.out.println(n1 + " is power of 2"); else System.out.println(n1 + " is not power of 2"); long n2 = 4096; // Using isPowerOfTwo(long x) method // of Guava's LongMath class if (LongMath.isPowerOfTwo(n2)) System.out.println(n2 + " is power of 2"); else System.out.println(n2 + " is not power of 2"); }} |
Output:
256 is power of 2 4096 is power of 2
