Does this variable need to be declared volatile?
- by titaniumdecoy
Does the out variable in the MyThread class need to be declared volatile in this code or will the "volatility" of the stdout variable in the ThreadTest class carry over?
import java.io.PrintStream;
class MyThread implements Runnable
{
int id;
PrintStream out; // should this be declared volatile?
MyThread(int id, PrintStream out) {
this.id = id;
this.out = out;
}
public void run() {
try {
Thread.currentThread().sleep((int)(1000 * Math.random()));
out.println("Thread " + id);
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public class ThreadTest
{
static volatile PrintStream stdout = System.out;
public static void main(String[] args) {
for (int i = 0; i < 10; i++) {
new Thread(new MyThread(i, stdout)).start();
}
}
}
