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How to sort an array and search an element inside it?
Following example shows how to use sort () and binarySearch () method to accomplish the task. The user defined method printArray () is used to display the output:
import java.util.Arrays; public class MainClass { public static void main(String args[]) throws Exception { int array[] = { 2, 5, -2, 6, -3, 8, 0, -7, -9, 4 }; Arrays.sort(array); printArray("Sorted array", array); int index = Arrays.binarySearch(array, 2); System.out.println("Found 2 @ " + index); } private static void printArray(String message, int array[]) { System.out.println(message + ": [length: " + array.length + "]"); for (int i = 0; i < array.length; i++) { if(i != 0){ System.out.print(", "); } System.out.print(array[i]); } System.out.println(); } } |
The above code sample will produce the following result.
Sorted array: [length: 10] -9, -7, -3, -2, 0, 2, 4, 5, 6, 8 Found 2 @ 5 |
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