Unable to recognize the methods of "runnable"-
This is my simple code that implements runnable but I m getting the errors of methods and variable not found. Please reply soon;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Prime implements Runnable
{
long lastprime = 0;
Date lastprimeModified = new Date();
Thread searcher;
public void init()
{
searcher = new Thread(this).setPriority(Thread.MAX_PRIORITY);
start();
}
public void run()
{
long candidate = 1000000000000001L;
while(true)
{
if(isPrime(candidate))
{
lastprime = candidate;
lastprimeModified = new Date();
}
candidate += 2;
try
{
Thread.sleep(200);
}
catch(InterruptedException e)
{}
}
}
private static boolean isPrime(long candidate)
{
long sqrt = candidate;
for(long i=3;i<sqrt;++i)
{
if(candidate%i ==0)
return false;
}
return true;
}
public void doGet(HttpServletRequest req,HttpServletResponse res)
throws ServletException, IOException
{
res.setContentType("text/plain");
PrintWriter out = res.getWriter();
if(lastprime==0)
out.println("Search In Progress ... Please Wait....");
else
{
out.println("The last Prime Discovered was" + lastprime);
out.println("at" + lastprimeModified);
}
}
public void destroy()
{
searcher.stop();
}
}
Following are the errors:
Prime.java:16: cannot find symbol
symbol : variable MAX_PRIORITY
location: class Thread
searcher = new Thread(this).setPriority(Thread.MAX_PRIORITY).sta
rt();
^
Prime.java:16: cannot find symbol
symbol : constructor Thread(Prime)
location: class Thread
searcher = new Thread(this).setPriority(Thread.MAX_PRIORITY).sta
rt();
^
Prime.java:36: cannot find symbol
symbol : method sleep(int)
location: class Thread
Thread.sleep(200);
^
Prime.java:72: cannot find symbol
symbol : method stop()
location: class Thread
searcher.stop();
^
C:\Program Files\Java\jdk1.6.0\bin\Thread.java:42: cannot find symbol
symbol : method sleep(int)
location: class Thread
Thread.sleep(10000);
^
C:\Program Files\Java\jdk1.6.0\bin\Thread.java:9: cannot find symbol
symbol : constructor Thread(NewThread,java.lang.String)
location: class Thread
t = new Thread(this,name);
^
C:\Program Files\Java\jdk1.6.0\bin\Thread.java:11: cannot find symbol
symbol : method start()
location: class Thread
t.start();
^
C:\Program Files\Java\jdk1.6.0\bin\Thread.java:21: cannot find symbol
symbol : method sleep(int)
location: class Thread
Thread.sleep(1000);
^
8 errors>
