Arrays.binarySearch(double[] a, int fromIndex, int toIndex, double key) has the following syntax.
public static int binarySearch(double[] a, int fromIndex, int toIndex, double key)
In the following code shows how to use Arrays.binarySearch(double[] a, int fromIndex, int toIndex, double key) method.
Binary search needs sorted arrays.
// www .j a v a 2 s . c om import java.util.Arrays; public class Main { public static void main(String[] args) { // initializing sorted double array double doubleArr[] = {5.4,5.5,9.2,9.3,35.4}; // value to search double searchVal = 5.4; // entering the range of index int retVal = Arrays.binarySearch(doubleArr,1,3,searchVal); System.out.println("The index of element 5.4 is : " + retVal); } }
The code above generates the following result.