some arrays

import java.math.*;
import java.util.Arrays;
public class Main
{
      public static int[] copyArr (int[] arr1, int n)
      {
          int [] arr2 = new int [n];
          for (int i =0; i<arr1.length; i++)
          {
              arr2[i] = arr1[i];
          }

          return arr2;
      }
      public static int[] extArr (int[] arr)
      {
          int [] arr2 = new int [(int) (arr.length * 1.5)];
          for (int i =0; i<arr.length; i++)
          {
              arr2[i] = arr[i];
          }
          return arr2;
      }
      public static  int[] cntProb ( int [] arr  )
      {

          int cube1 , cube2 ;
          arr = new int[11];
          int sum;
          for (int ii = 0; ii<20000; ii++)
          {
             cube1 =(int) (Math.random() *6 + 1);
             cube2 =(int) (Math.random() *6 + 1 );
             sum = cube1 + cube2;
             if (sum == 1)
             {
                 arr[0] = arr[0] + 1;
             }
             if (sum == 2)
             {
                 arr[1] = arr[1] + 1;
             }
             if (sum == 3)
             {
                 arr[2] = arr[2] + 1;
             }
             if (sum == 4)
             {
                 arr[3] = arr[3] + 1;
             }
             if (sum == 5)
             {
                 arr[4] = arr[4] + 1;
             }
             if (sum == 6)
             {
                 arr[5] = arr[5] + 1;
             }
             if (sum == 7)
             {
                 arr[6] = arr[6] + 1;
             }
             if (sum == 8)
             {
                 arr[7] = arr[7] + 1;
             }
             if (sum == 9)
             {
                 arr[8] = arr[8] + 1;
             }
             if (sum == 10)
             {
                 arr[9] = arr[9] + 1;
             }
             if (sum == 11)
             {
                 arr[10] = arr[10] + 1;
             }
//           if (sum == 12)
//           {
//               arr[11] = arr[11] + 1;
//           }


          }
          return arr;
      }


    /**
     * @param args
     */
    public static void main(String[] args)
    {   /*
        int[] arr1 = new int [100];
        arr1[arr1.length] = (int) (Math.random() *10) ;
        System.out.println(arr1[0]);
        int tmp = arr1[arr1.length-1];
        for (int ii = arr1.length-1; ii>0; ii--)
        {

            arr1 [ii] = arr1[ii--];
            arr1[0] = tmp;

        }

        System.out.println(Arrays.toString(arr1)); */
        int [] myArr = new int [50];
        for (int i =0;myArr.length>i; i++)
    {
            myArr[i] = (int) (Math.random() *10);
    }
        int [] nArr = extArr(myArr);
        int [] cutsome = new int [11];
        cutsome= cntProb(cutsome);
        System.out.println(Arrays.toString(myArr) + "\n");

        System.out.println(Arrays.toString(nArr) + "\n");
        System.out.println(Arrays.toString(cutsome));





    }

}