Java Collection Tutorial - Java Arrays.binarySearch(char[] a, int fromIndex, int toIndex, char key)

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Syntax

Arrays.binarySearch(char[] a, int fromIndex, int toIndex, char key) has the following syntax.

public static int binarySearch(char[] a,  int fromIndex,  int toIndex,  char key)

Example

In the following code shows how to use Arrays.binarySearch(char[] a, int fromIndex, int toIndex, char key) method.

Binary search needs sorted arrays.

import java.util.Arrays;
/* w w w . j  a va 2s  . com*/
public class Main {

   public static void main(String[] args) {

    // initializing sorted char array
    char charArr[] = {'a', 'c', 'd', 'e','f'};

    // value to search
    char searchVal = 'e';

    // entering the range of index
    int retVal = Arrays.binarySearch(charArr,1,5,searchVal);

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

The code above generates the following result.

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