class TLtest extends Thread {
public static void main (String [] args) {
Data d = new Data ();
new ThreadTest (d, "A").start ();
new ThreadTest (d, "B").start ();
}
}
class Data {
private static ThreadLocal owner = new ThreadLocal () {
public Object initialValue () { return ("0"); }
};
synchronized public void set (String v){owner.set (v);}
synchronized public String get (){return (String)owner.get();}
}
class ThreadTest extends Thread {
public Data d;
ThreadTest (Data d, String name) {
super (name);
this.d = d;
}
public void run () {
int value = 0;
int ref = 0;
for (int i = 0; i < 20; i++) {
int rand = (int)(Math.random ()*20);
value = Integer.parseInt (d.get());
value += rand; ref += rand;
d.set (Integer.toString (value));
try {
sleep((int)(Math.random() * 500));
} catch (InterruptedException e) {}
}
if (ref == value)
System.out.println ("test OK.");
else
System.out.println ("test failed.");
}
}