Java Arrays.binarySearch(double[] a, double key)

Syntax

Arrays.binarySearch(double[] a, double key) has the following syntax.

public static int binarySearch(double[] a,  double key)

Example

In the following code shows how to use Arrays.binarySearch(double[] a, double key) method.

Binary search needs sorted arrays.


//from   www. j av a2  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 search
    double searchVal = 5.4;

    int retVal = Arrays.binarySearch(doubleArr,searchVal);

    System.out.println("The index of element 5.4 is : " + retVal);
  }
}

The code above generates the following result.