Java Example - Array sorting and element search

The following example demonstrates how to use the sort() method to sort a Java array, and how to use the binarySearch() method to find elements in the array. Here we define the printArray() method to print the array:

/*
 author by w3cschool.cc
 文件名：MainClass.java 
 */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("数组排序结果为", array);
      int index = Arrays.binarySearch(array, 2);
      System.out.println("元素 2  在第 " + index + " 个位置");
   }
   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 output result of running the above code is:

数组排序结果为: [length: 10] -9, -7, -3, -2, 0, 2, 4, 5, 6, 8
元素 2 在第 5 个位置

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