Here I have used JSP to generate random numbers and calculate their sum and average. I haven't used sessions. But how can I implement session such that new random numbers generated only at new sessions and random numbers generated in the first session is retained throughout even with page refresh.
Here's the code
<%@page import="java.util.Date"%>
<%@page import="java.util.Random"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Working Title</title>
</head>
<body>
<h1>Experiment</h1>
<%
Date createTime = new Date(session.getCreationTime());
Date lastAccessTime = new Date(session.getLastAccessedTime());
int r = 25, c = 5, n;
double t=0;
int i=0,j=0;
double num[][] = new double[27][5];
Random ran = new Random();
out.print("<table border='1px'>");
out.print("<tr><th>Trial-1</th><th>Trial-2</th><th>Trial-3</th><th>Horizontal Sum</th><th>Horizontal Average</th></tr>");
for(i=0;i<r;i++) {
t=0;
out.print("<tr>");
for(j=0;j<c-2;j++) {
n = ran.nextInt(10-1+1)+1;
num[i][j]=n;
t = t+ n;
out.print("<td>"+ n +"</td>");
}
num[i][3]=t;
num[i][4]=t/3;
out.print("<td>"+ t +"</td> "+ "<td>"+ t/3+"</td> ");
out.println("</tr>");
}
for(i=0;i<c;i++) {
t=0;
for(j=0;j<r;j++) {
t = t + num[j][i];
}
num[j][i]=t;
num[j+1][i]=t/25;
}
for(i=25;i<27;i++) {
out.print("<tr>");
if(i==25)
out.print("<th colspan='3'>Vertical Sum</th>");
if(i==26)
out.print("<th colspan='3'>Vertical Average</th>");
for(j=3;j<c;j++) {
out.print("<td>"+ num[i][j]+"</td>");
}
out.println();
out.print("</tr>");
}
out.print("</table>");
%>
</body>
</html>
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