búsqueda binaria string ejemplo de java

Después de tanto batallar hemos dado con la contestación de este asunto que agunos lectores de esta web presentan. Si deseas compartir algún detalle puedes aportar tu conocimiento.

Ejemplo 1: búsqueda binaria java

// Java implementation of iterative Binary Search classBinarySearch// Returns index of x if it is present in arr[], // else return -1 intbinarySearch(int arr[],int x)int l =0, r = arr.length -1;while(l <= r)int m = l +(r - l)/2;// Check if x is present at mid if(arr[m]== x)return m;// If x greater, ignore left half if(arr[m]< x) 
				l = m +1;// If x is smaller, ignore right half else
				r = m -1;// if we reach here, then element was // not present return-1;// Driver method to test above publicstaticvoidmain(String args[])BinarySearch ob =newBinarySearch();int arr[]=2,3,4,10,40;int n = arr.length;int x =10;int result = ob.binarySearch(arr, x);if(result ==-1)System.out.println("Element not present");elseSystem.out.println("Element found at "+"index "+ result);

Ejemplo 2: búsqueda binaria en java

importjava.util.Scanner;// Binary Search in JavaclassMainintbinarySearch(int array[],int element,int low,int high)// Repeat until the pointers low and high meet each otherwhile(low <= high)// get index of mid elementint mid = low +(high - low)/2;// if element to be searched is the mid elementif(array[mid]== element)return mid;// if element is less than mid element// search only the left side of midif(array[mid]< element)
        low = mid +1;// if element is greater than mid element// search only the right side of midelse
        high = mid -1;return-1;publicstaticvoidmain(String args[])// create an object of Main classMain obj =newMain();// create a sorted arrayint[] array =3,4,5,6,7,8,9;int n = array.length;// get input from user for element to be searchedScanner input =newScanner(System.in);System.out.println("Enter element to be searched:");// element to be searchedint element = input.nextInt();
    input.close();// call the binary search method// pass arguments: array, element, index of first and last elementint result = obj.binarySearch(array, element,0, n -1);if(result ==-1)System.out.println("Not found");elseSystem.out.println("Element found at index "+ result);

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