Question

JAVA Write a program that reads the integers between -100 and 100 and counts the occurrences of each with ascending order.

input: line1:number of figures

line2:number

Sample Input

5
-3
100
-1
-2
-1

Sample Output

-3 1
-2 1
-1 2
100 1

Answer 1

Here I am sending code, screens of code and outputs. If you have any questions or queries comment below. Thank you.

Java code:

import java.util.*;
public class Occurence {
   public static void main(String args[])
   {
       Scanner sc = new Scanner(System.in);
       int size = sc.nextInt(); // reading size from user
       List<Integer> arr = new ArrayList(); // initializing arraylist
      
       for(int i=0 ; i<size ; i++) // loop for adding elements to arraylist
       {
           arr.add(sc.nextInt()); // reading and adding elements to arraylist
       }
       /*treeset arrange the elements in increasing order without repetition*/
       TreeSet<Integer> ts = new TreeSet<Integer>(arr); // initializing treeset
      
       Iterator<Integer> it = ts.iterator(); // creating iterator
      
       while(it.hasNext()) // loop for printing element and occurrence
       {
           int n = it.next();
           System.out.println(n+" "+Collections.frequency(arr,n)); //printing element and occurrence
       }
   }

}

output: