ArrayList - Integer Manipulation

// ArrayList

// Integer Array

/*

Write a Java program to perform the following task.

Take an integer array of size 20, initialize values randomly between 10 and 90, simultaneously sum all values and calculate average. Now separate values below average and above average in ArrayLists. Finally print both lists in 2 separate rows.

*/

import java.util.*;

class ALRandInt

{

     public static void main(String as[])

     {

          Integer [] ia = new Integer[20];

          ArrayList <Integer>al1 = new ArrayList<Integer>();

          ArrayList <Integer>al2 = new ArrayList<Integer>();

         

          int i = 0;

          int Sum = 0;

          while(i<20)

          {

              int v=((int)(Math.random()*1000))%90;

              if(v>10)

              {

                   ia[i]=v;

                   Sum+=v;

                   i++;

              }

          }  

         

          int avg = (int)(Sum/20);

             

          for(Integer val:ia)

          {

              int x = Integer.valueOf(val);

              if(x>avg)

                   al1.add(val);

              else

                   al2.add(val);

          }

             

          ArrayList<Integer> al = new ArrayList<>(Arrays.asList(ia));

         

          System.out.println("ArrayList 1 - All Elements : "+al);

             

          System.out.println("Average = "+avg);      

             

          System.out.println("ArrayList 2 - Elements which are above average : "+al1);

             

          System.out.println("ArrayList 3 - Elements which are below average : "+al2);

     }

}

/*

Sample Output

D:\oopjava>javac ALRandInt.java

D:\oopjava>java ALRandInt

ArrayList 1 - All Elements : [12, 84, 68, 79, 30, 66, 67, 11, 30, 82, 56, 37, 43, 49, 48, 72, 21, 56, 35, 21]

Average = 48

ArrayList 2 - Elements which are above average : [84, 68, 79, 66, 67, 82, 56, 49, 72, 56]

ArrayList 3 - Elements which are below average : [12, 30, 11, 30, 37, 43, 48, 21, 35, 21]

D:\oopjava>java ALRandInt

ArrayList 1 - All Elements : [60, 66, 39, 44, 23, 28, 70, 42, 71, 85, 31, 65, 71, 31, 59, 18, 76, 58, 86, 88]

Average = 55

ArrayList 2 - Elements which are above average : [60, 66, 70, 71, 85, 65, 71, 59, 76, 58, 86, 88]

ArrayList 3 - Elements which are below average : [39, 44, 23, 28, 42, 31, 31, 18]

D:\oopjava>

*/