从另一个类更改变量

Question

If I have a primary class (primary as in it has most of the code, the run method, etc) that is running and a Thread running in a different class, can the Thread change a [public static] boolean that resides in the primary class and the primary class reacts accordingly?

Please specify if I'm being unclear!

Answer 1

You can assign to static public members from an other class from a Thread. But, think about concurrent acces. So you need to protect the access to this member using the Java keyword synchronized .

The best way to do that is:

private static String thing = "dskfjksf";

public static void setThing(String newValue) {
    synchronized(thing) {
        thing = newValue;
    }
}