To see the solve of  finding average of some numbers using java read bellow:

import java.io.*;

public class Average
{
public static void main(String args[]) throws Exception

{
System.out.print(“How many number you want : “);
BufferedReader input1 = new BufferedReader(new InputStreamReader(System.in));
String data1=input1.readLine();
int value1=Integer.parseInt(data1);

int value[]=new int[value1];
String data[]=new String[value1];
int sum=0;
float aver;

System.out.println(“Enter value for array : “);
for(int i=0;i<value1;i++)
{
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
data[i]=input.readLine();
value[i]=Integer.parseInt(data[i]);
sum+=value[i];
}

aver=(float)sum/(float)value1;
System.out.println(“Average is “+aver);
}
}