Binary Search on array

Binary Search on array

What requirement is placed on an array, so that binary search may be used to locate an entry? ? The array elements must form a heap. ? The array must have at least 2 entries. ? The array must be sorted. ? The array??s size must be a power of two.

View Answers

August 21, 2012 at 3:01 PM

Here is an example that uses java in built function to search the location of particular array element.

import java.util.Arrays;

public class binary_search {

    public static void main(String[] args) {
           int ar1[]={2,44,5,66,78,90,23,66};
           int p, key=78;
           p=Arrays.binarySearch(ar1, key);
           System.out.println("element found at index "+p);
           Arrays.sort(ar1);
           p=Arrays.binarySearch(ar1, key);
           System.out.println("element found at index "+p);     
    }
}

August 21, 2012 at 3:07 PM

Here is an example that implements binary search function and all the user to add elements to an array in order to search the location of particular array element.

import java.util.*;

public class BinarySearch {
        public static void main(String[] args) {
                int[] intArray = new int[10];
                int searchValue = 0, index;
                System.out.println("Enter 10 numbers");
                Scanner input = new Scanner(System.in);
                for (int i = 0; i < intArray.length; i++) {
                        intArray[i] = input.nextInt();
                }
                System.out.print("Enter a number to search for: ");
                searchValue = input.nextInt();
                index = binarySearch(intArray, searchValue);
                if (index != -1) {
                        System.out.println("Found at index: " + index);
                } else {
                        System.out.println("Not Found");
                }
        }

        static int binarySearch(int[] search, int find) {
                int start, end, midPt;
                start = 0;
                end = search.length - 1;
                while (start <= end) {
                        midPt = (start + end) / 2;
                        if (search[midPt] == find) {
                                return midPt;
                        } else if (search[midPt] < find) {
                                start = midPt + 1;
                        } else {
                                end = midPt - 1;
                        }
                }
                return -1;
        }
}

Ads









Related Tutorials/Questions & Answers:
Binary Search on array
Binary Search on array  What requirement is placed on an array, so that binary search may be used to locate an entry? ? The array elements must form a heap. ? The array must have at least 2 entries. ? The array must
JavaScript Array Binary Search
JavaScript Array Binary Search       The JavaScript Binary Search becomes very useful in case of large Arrays.  The Binary Search algorithm is used to  handle
Advertisements
How to using Binary Search Array Java ?
How to using Binary Search Array Java ?  Hi, I am beginners in Java... functions. The problem is that how to use binary search array in Java. Please give any online reference show that i will implement the binary search array in Java
How to create binary search tree using an array?
How to create binary search tree using an array?  hello people, pls guide me on the topic above. i have an string array, i want to make a binary search tree based on data inside this array. the array contains names of people
binary search program
binary search program  write a program to searching a string using binary search
binary search program
binary search program  write a program to searching a string using binary search
binary search program
binary search program  write a program to searching a string using binary search
binary search program
binary search program  write a program to searching a string using binary search
binary search program
binary search program  write a program to searching a string using binary search
Which of the following statements are true with respect to binary search
; Which of the following statements are true with respect to binary search? 1. The array need not be sorted for carrying out binary search 2. Binary search... of the array. 4. The search begins if the search value is equal to the middle
binary search tree
binary search tree  Construct a binary search tree by inserting the following sequence of characters into an empty tree. N O N L I N E A R D A T... for each algorithm. get an item from the user and search the level/levels
binary search tree
binary search tree  Construct a binary search tree by inserting words into an empty tree. "cut your coat according to your cloth" Visit the tree.... get a word from the user and search the level/levels of that word. refer split
Binary Search in Java
Binary Search in Java is used to search an element from an array. Programmers opt for Binary search over linear search when it comes to large numbers. It can... the answer "Not Found". Following is the example of Binary Search in Java: import
Array search
for the search operation. he value with one or more of the array items. Search begins...Array search  Need a program which performs a searching operation on a one dimensional array called NUM, which is an N-element array stored in a file
ModuleNotFoundError: No module named 'binary-search'
ModuleNotFoundError: No module named 'binary-search'  Hi, My... 'binary-search' How to remove the ModuleNotFoundError: No module named 'binary-search' error? Thanks   Hi, In your python
JAVA: Recusrion, Binary Search
JAVA: Recusrion, Binary Search  I want to learn about Binary Search... it using a recursive implementation of Binary Search. For the cases when more than one result can be returned, modify Binary Search to return all the elements
Binary Search Tree
Binary Search Tree  Question-1 ) Modify the BinarySearchTree class so that the iterators are fail-fast.Test your class with amain method ? Question-2 ) Modify the BinarySearchTree class so that the BinarySearchTree objects
Binary Search Tree
Binary Search Tree  Question-1 ) Modify the BinarySearchTree class so that the iterators are fail-fast.Test your class with amain method ? Question-2 ) Modify the BinarySearchTree class so that the BinarySearchTree objects
binary search tree
binary search tree  how can i make binary search tree? i want write a code that make dictionary with binary search tree data structure.please help me...){ IsEmpty(); currentNode = find(root, number); System.out.println("Search
ModuleNotFoundError: No module named 'binary-file-search'
ModuleNotFoundError: No module named 'binary-file-search'  Hi, My... named 'binary-file-search' How to remove the ModuleNotFoundError: No module named 'binary-file-search' error? Thanks   Hi, In your
Binary search tree (insertion) urgent!!
Binary search tree (insertion) urgent!!  Create a program to construct a binary search tree consisting of nodes that each stores an integer.... Assume a binary search tree is constructed from the values 14, 35, 2, 3, 39
Reading binary file into byte array in Java
Example code of reading binary file into byte array in Java This example shows you how to read a binary file into byte array from Java program. This type of example code is need where you have to read the binary data into byte array
binary search tree from text file
binary search tree from text file  How so I go about constructing a binary search tree from a text file, which has letters and numbers, which must be sorted and printed in ascending order. E.g. Text file contents 3 apples pears
binary
binary  Hi I want to write a program in pascal that ask a user to input a decimal number and then return its binary equivalent in the minimum number of bits required to repesent the number. Thks
Binary tree
Binary tree  a. Construct a method to implement a binary tree using an array. b. Implement the binary tree to store numbers in sorted order
Search an elements in the array
Search an elements in the array In this section we will discuss about how to check the availability of an element in the array. Array is a collection... is the program to search an element in the array. import java.util.Scanner; public
in_array
in_array  in_array in php
is _array()
is _array()  is_array() in php   Hi Friend, This function is of Boolean type.It checks whether a variable is an array or not. Here is an example: <?php $yes = array('Hello', 'World'); echo is_array($yes) ? 'Array
is _array()
is _array()  is _array()   Hi Friend, This function is of Boolean type.It checks whether a variable is an array or not. Here is an example: <?php $yes = array('Hello', 'World'); echo is_array($yes) ? 'Array
Array
Array  how can i use elements of an array in a circular form? that is if the searching of the element reach the last elements of the array, then it will start serching from the begining of the array
Array
Array  is it possible to define array like this..? int[] intArray = new int[] {4,5,6,7,8}; Explain...?   Yes, you can. Java Initialize Array

Ads