Question

Print frequency of each element of an array.

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Code

				
					import java.util.Scanner;
public class frequencyOfNumbersInArray
{  
    public static void main(String[] args)
    {  
        /* Initialize array */  
        int [] arr;
       
        int n=0,i=0,j=0,count=0;
        Scanner sc = new Scanner(System.in);    
        
        System.out.println("Enter a number of elements in the array");   
        n = sc.nextInt(); 
        arr=new int[n];
        System.out.println("Enter numbers in array");
        
        for(i=0;i< n;i++)
        {
            arr[i]=sc.nextInt();
        }
        
        System.out.println("---------------------");  
        System.out.println(" Element        Frequency");  
        System.out.println("---------------------");  
        
          
        /*finding the frequency of elements the array and printing the number and frequency of it */  
        for (i = 0; i < n; i++)
        {   
            count=0;
            if(arr[i]!=-9999999)
            {
             for(j=0;j< n;j++)
            {
            
                if(arr[j]==arr[i])
                {
                /* replacing the duplicate element so that it is not repeated again */
                    arr[j]=-9999999; 
                    count++;
                
                }
            }
            System.out.println(i+"         "+count);
            
            }
           
        }    
          
       
    }  
}