Insert an element in Array, Search and Sort Array by using java program

By: Saravanan in Java Tutorials on 2010-01-01

In this tutorial we are going to see how to insert an element for specified index and how to search an element in array and not in array.

import java.util.*;
public class ArrayExample
 {
  public static void main(String args[]) throws Exception
   {
    int a[] = {9, 4, 6, -3, -7, 2, 3, -2, 5, -9, 4};
    Arrays.sort(a);
    printArray("Sorted array", a);

    int i = Arrays.binarySearch(a, 9);
    System.out.println("Array have 9. " + i);

    i = Arrays.binarySearch(a, 8);
    System.out.println("Array have not 8." + i);

    int i1 = -i - 1;
    a = insertElement(a, 8, i1);
    printArray("In array 8 is added", a);

  }
  private static void printArray(String message, int a[]) 
  {
    System.out.println(message + ": [length: " + a.length + "]");
    for (int i=0, n=a.length; i<n; i++)
    {
      if (i != 0) System.out.print(", ");
      System.out.print(a[i]);
    }
    System.out.println();
  }
  private static int[] insertElement(int original[], int element, int in)
  {
    int length = original.length;
    int destination[] = new int[length+1];
    System.arraycopy(original, 0, destination, 0, in);
    destination[index] = element;
    System.arraycopy(original, in, destination, in+1, length-in);
    return destination;
  }
}

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