Question

How to perform binary search on byte Array in Java

Answer 1

package javaapplication1;

import java.util.Arrays;

public class JavaApplication1 {

    public static void main(String[] args) {

        byte bArr[] = {1, 2, 3, 4, 5, 6, 7}; 
   
        Arrays.sort(bArr);
   
        byte bVal = 3;
          
        int r = Arrays.binarySearch(bArr, bVal);
        System.out.println(r);
    }
}
 
/*
run:
 
2
 
*/

 

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Answer 2

package javaapplication1;

import java.util.Arrays;

public class JavaApplication1 {

    public static void main(String[] args) {

        byte bArr[] = {1, 7, 5, 2, 3, 6, 4}; 
   
        Arrays.sort(bArr);
   
        byte bVal = 5;
          
        int r = Arrays.binarySearch(bArr, bVal);
        System.out.println(r);
    }
}
 
/*
run:
 
4
 
*/

 

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Answer 3

package javaapplication1;

import java.util.Arrays;

public class JavaApplication1 {

    public static void main(String[] args) {

        byte bArr[] = {1, 7, 5, 2, 3, 6, 4}; 
   
        Arrays.sort(bArr);
   
        byte bVal = 100;
        int r = Arrays.binarySearch(bArr, bVal);
        System.out.println(r);
        
        bVal = 9;
        r = Arrays.binarySearch(bArr, bVal);
        System.out.println(r);
        
        bVal = 10;
        r = Arrays.binarySearch(bArr, bVal);
        System.out.println(r);
    }
}
 
/*
run:
 
-8
-8
-8
 
*/

 

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