java get average for all items in a selected category

Question

How can I get the average salary of all employees in the selected company? I first select the company and then pass the id and based on that id, i get all employees in there and

Answer 1

You could sum the salaries up and then divide by the number of employees:

<% List employees = company.getEmployees();
   double sum=0.0;
%>
        
    <%
for(int i=0; i  
        
    <% } %>


    

        
ID
        
Name
                        
        
Salary
             
    
      
            
<%=employees.get(i).getId()%>
            
<%=employees.get(i).getNom()%>
                
            
<%=employees.get(i).getSalary()%>
  
        
 

//get the average salary of all employees
Average salary of all employees in this company:<%=sum/(double)employees.size()%> 

Having said that, I urge you to reconsider before going down that road. Having code inside your JSP will severely hinder your chances of maintaining it if it gets any bigger than 1-2 pages. All your business logic should happen in your code (e.g. inside your servlets) and in JSPs only display the information.