# Multithreading For Prime and Fibonacci numbers using pipes in Java

multi-threaded Java program to print all numbers below 100,000 that are both prime and Fibonacci number
```import java.util.*;
import java.io.*;
class Fibonacci extends Thread
{
private PipedWriter out = new PipedWriter();
public PipedWriter getPipedWriter()
{
return out;
}
public void run()
{
t.setName("Fibonacci");
System.out.println(t.getName() + " thread started");
int fibo1=0,fibo2=1,fibo=0;
while(true)
{
try
{
fibo = fibo1 + fibo2;
if(fibo>100000)
{
out.close();
break;
}
out.write(fibo);
sleep(100);
}
catch(Exception e)
{
System.out.println("Fibonacci:"+e);
}
fibo1=fibo2;
fibo2=fibo;
}
System.out.println(t.getName() + " thread exiting");
}
}
class Prime extends Thread
{
private PipedWriter out1 = new PipedWriter();
public PipedWriter getPipedWriter()
{
return out1;
}
public void run()
{
t.setName("Prime");
System.out.println(t.getName() + " thread Started...");
int prime=1;
while(true)
{
try
{
if(prime>100000)
{
out1.close();
break;
}
if(isPrime(prime))
out1.write(prime);
prime++;
sleep(0);
}
catch(Exception e)
{
System.out.println(t.getName() + " thread exiting.");
System.exit(0);
}
}
}
public boolean isPrime(int n)
{
int m=(int)Math.round(Math.sqrt(n));
if(n==1 || n==2)
return true;
for(int i=2;i<=m;i++)
if(n%i==0)
return false;
return true;
}
}
public class PipedIo
{
public static void main(String[] args) throws Exception
{
t.setName("Main");
System.out.println(t.getName() + " thread Started...");
Fibonacci fibonacci = new Fibonacci();
Prime prime = new Prime();
fibonacci.start();
prime.start();
System.out.println("The numbers common to PRIME and FIBONACCI:");
while((fib!=-1) && (prm!=-1))
{
while(prm<=fib)
{
if(fib==prm)
System.out.println(prm);
}
}
System.out.println(t.getName() + " thread exiting");
}
}
```