Are there any guarantees to the variable visibility and/or ordering of instructions before Thread.start() in relation to the starting of the new thread?
Specifically, in the minimalistic example below, am I correct in assuming that var should be volatile in order for the output to be deterministic and always print "var = 10"?
public class ThreadExample {
private int var;
void example() {
var = 10;
Thread thread = new MyThread();
thread.start();
}
class MyThread extends Thread {
@Override
public void run() {
System.out.println("var = " + var);
}
}
}
Note: My question only applies to the "new" Java memory model introduced in Java 5
