Yes, the private member variable bar should be final right? But actually, in this instance, it is an atomic operation to simply read the value of an int. So is this technically thread safe?

class foo {
    private int bar;
    public foo(int bar) {
        this.bar = bar;
    }
    public int getBar() {
        return bar;
    }
}

// assume infinite number of threads repeatedly calling getBar on the same instance of foo.