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 :
// Java code to show implementation of// isPowerOfTwo(int x) method of Guava's// IntMath classimport java.math.RoundingMode;import com.google.common.math.IntMath; class GFG { // Driver code public static void main(String args[]) { int a1 = 63; // Using isPowerOfTwo(int x) method // of Guava's IntMath class 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; // Using isPowerOfTwo(int x) method // of Guava's IntMath class 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 :
// Java code to show implementation of// isPowerOfTwo(int x) method of Guava's// IntMath classimport java.math.RoundingMode;import com.google.common.math.IntMath; class GFG { // Driver code public static void main(String args[]) { int a1 = 10; // Using isPowerOfTwo(int x) method // of Guava's IntMath class 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; // Using isPowerOfTwo(int x) method // of Guava's IntMath class 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
