Programming Examples

Java program to search any element in sorted array using binary search


Write a Java Program to input any sorted array and search a specific element in array using Binary Search.

Solution:

import java.util.*;
class BinarySearch
{
    public static void main(String arr[])
    {
        Scanner sc=new Scanner(System.in);        
        System.out.println("Enter the size of Array : ");
        int n=sc.nextInt();
        int num[]=new int[n];        
        System.out.println("Enter the "+n+" Elements of Array in Accending order");
        for(int i=0;i<n;i++)
        {
            num[i]=sc.nextInt();
        }
        System.out.println("Enter any number for Search : ");
        int ch=sc.nextInt();
        int min=0,max=n-1,mid;
        boolean found=false;
        while(min<=max)
        {
            mid=(min+max)/2;
            if(num[mid]==ch)
            {
                found=true;
                System.out.println("Element Found At "+mid+" index");
                break;
            }
            else if(ch<num[mid])
            {
                max=mid-1;
            }
            else
            {
                min=mid+1;
            }
        }
        if(found==false)
        {
            System.out.println("Element Not Found in Array ");
        }
    }
}
Output

Enter the size of Array : 

8

Enter the 8 Elements of Array in Accending order

2

3

4

4

5

6

7

8

Enter any number for Search : 

5

Element Found At 4 index

Enter the size of Array : 

5

Enter the 5 Elements of Array in Accending order

22

33

44

55

66

Enter any number for Search : 

50

Element Not Found in Array 

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