freq.java

import java.util.*;
public class freq
 {
 public static void main(String[] args)
 {
  try
  {
  Scanner s=new Scanner(System.in);
  int [] arr;
  int n,k;
  System.out.print("Enter the no. of element: ");  
  n= s.nextInt();
  arr = new int[n];
  System.out.print("Enter elements: ");
  for(k=0;k<n;k++)
  {
     arr[k]=s.nextInt();
   }
 int [] fr = new int [arr.length];
 int visited = -1;
 for(int i = 0; i < arr.length; i++){ int count = 1;
 for(int j = i+1; j < arr.length; j++)
{
 if(arr[i] == arr[j])
{
 count++;
 fr[j] = visited;
 }
 }
 if(fr[i] != visited)
 fr[i] = count;
 }

 System.out.println("---------------------------------------");
 System.out.println(" Element | Frequency");
 System.out.println("---------------------------------------");
 for(int i = 0; i < fr.length; i++){
 if(fr[i] != visited)
 System.out.println(" " + arr[i] + " | " + fr[i]);
 }
 System.out.println("----------------------------------------");
 }
catch(Exception e)
{
  System.out.println("Due to string Exception");
 } 
 }
}