Write a program to print the frequency of element in an array.
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import java.io.*;
class frequency
{
public static void main()throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the size of the array");
int n=Integer.parseInt(br.readLine());
int Arr[]=new int[n];
int FREQ[]=new int[n];
int visited=-1;
System.out.println("Enter the values");
for(int i=0;i<n;i++)
{
Arr[i]=Integer.parseInt(br.readLine());
}
for(int i=0;i<n;i++)
{
int count=1;
for(int j=i+1;j<n;j++)
{
if(Arr[i]==Arr[j])
{
count ++;
FREQ[j]=visited;
}
}
if(FREQ[i]!=visited)
{
FREQ[i]=count;
}
}
System.out.println("------------------------------------------");
System.out.println("ELEMENT"+"\t"+"FREQUENCY");
System.out.println("------------------------------------------");
for(int i=0;i<n;i++)
{
if(FREQ[i]!=visited)
{
System.out.println(Arr[i]+"\t"+FREQ[i]);
}
}
}
}Output:
Enter the size of the array
4
10
20
10
15
ELEMENT FREQUENCY
10 2
20 1
15 1
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