Question

How to perform binary search on float Array in Java

Answer 1

package javaapplication1;

import java.util.Arrays;

public class JavaApplication1 {

    public static void main(String[] args) {

        float floatArr[] = {3.01f, 3.14f, 2.58f, 1.23f, 5.10f, 6.19f, 4.12f};

        Arrays.sort(floatArr);

        float f = 3.14f;

        int r = Arrays.binarySearch(floatArr, f);
        System.out.println(r);
    }
}
 
/*
run:
 
3
 
*/

 

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Answer 2

package javaapplication1;

import java.util.Arrays;

public class JavaApplication1 {

    public static void main(String[] args) {

        float floatArr[] = {3.01f, 3.14f, 2.58f, 1.23f, 5.10f, 6.19f, 4.12f};

        Arrays.sort(floatArr);

        float f = 3.13f;
        int r = Arrays.binarySearch(floatArr, f);
        System.out.println(r);
        
        f = 5.06f;
        r = Arrays.binarySearch(floatArr, f);
        System.out.println(r);
        
        f = 6.20f;
        r = Arrays.binarySearch(floatArr, f);
        System.out.println(r);
        
        f = 18.25f;
        r = Arrays.binarySearch(floatArr, f);
        System.out.println(r);
    }
}
 
/*
run:
 
-4
-6
-8
-8
 
*/

 

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