Adding element instances to Java arrays

The following examples demonstrate how to sort a Java array using the sort () method and insert elements into the array using the insertelement () method. Here, we define the printarray () method to print the array:

MainClass. Java file:

import java.util.Arrays;

public class MainClass {
  public static void main(String args[]) throws Exception {
   int array[] = { 2,5,-2,6,-3,8,-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,destination,index);
   destination[index] = element;
   System.arraycopy(original,index,index
   + 1,length - index);
   return destination;
  }
}

The output of the above code is:

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