Java示例数组排序和插入

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, 1);

      System.out.println("Didn't find 1 @ " + index);



      int newIndex = -index - 1;

      array = insertElement(array, 1, newIndex);

      printArray("With 1 added", array);

   }

   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();

   }

   private static int[] insertElement(int original[], int element, int index) {

      int length = original.length;

      int destination[] = new int[length + 1];

      System.arraycopy(original, 0, destination, 0, index);

      destination[index] = element;

      System.arraycopy(original, index, destination, index + 1, length - index);

      return destination;

   }

}