Java数组添加元素实例

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", array);   int index = Arrays.binarySearch(array, 1);   System.out.println("元素 1 所在位置（负数为不存在）："   + index);    int newIndex = -index - 1;   array = insertElement(array, 1, newIndex);   printArray("数组添加元素 1", 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;  }}