algorithm/Java
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/Java.git synced 2025-07-10 21:43:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

Clean Java BinarySearch

Browse Source 
Cleans the Java implementation of binary search to be more consistent with styles and to avoid unnecessary boxing of int types
This commit is contained in:
Sam
2018-10-22 20:35:07 +01:00
committed by GitHub
parent f771b8baf4
commit 174b83f764
1 changed files with 13 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
Searches/src/search/BinarySearch.java
View File

@ -2,7 +2,8 @@ package search;
import java.util.Arrays; import java.util.Arrays;
import java.util.Random; import java.util.Random;
import java.util.stream.Stream; import java.util.concurrent.ThreadLocalRandom
import java.util.stream.IntStream;
import static java.lang.String.format; import static java.lang.String.format;
@ -70,23 +71,24 @@ class BinarySearch implements SearchAlgorithm {
// Driver Program // Driver Program
public static void main(String[] args) { public static void main(String[] args) {
// Just generate data
Random random = ThreadLocalRandom.current();
//just generate data
Random r = new Random();
int size = 100; int size = 100;
int maxElement = 100000; int maxElement = 100000;
Integer[] integers = Stream.generate(() -> r.nextInt(maxElement)).limit(size).sorted().toArray(Integer[]::new);
int[] integers = IntStream.generate(() -> r.nextInt(maxElement)).limit(size).sorted().toArray();
//the element that should be found // The element that should be found
Integer shouldBeFound = integers[r.nextInt(size - 1)]; int shouldBeFound = integers[r.nextInt(size - 1)];
BinarySearch search = new BinarySearch(); BinarySearch search = new BinarySearch();
int atIndex = search.find(integers, shouldBeFound); int atIndex = search.find(integers, shouldBeFound);
System.out.println(String.format("Should be found: %d. Found %d at index %d. An array length %d" System.out.println(format(
, shouldBeFound, integers[atIndex], atIndex, size)); "Should be found: %d. Found %d at index %d. An array length %d",
shouldBeFound, integers[atIndex], atIndex, size
));
int toCheck = Arrays.binarySearch(integers, shouldBeFound); int toCheck = Arrays.binarySearch(integers, shouldBeFound);
System.out.println(format("Found by system method at an index: %d. Is equal: %b", toCheck, toCheck == atIndex)); System.out.println(format("Found by system method at an index: %d. Is equal: %b", toCheck, toCheck == atIndex));