Test synchronized method

class Data{
    private String name;
    synchronized public void setName(){
            name = Thread.currentThread().getName();
            print("before: " + name);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException x) {
            }
            print("after: " + name);

    };
  public static void print(String msg) {
    System.out.println(Thread.currentThread().getName() + ": " + msg);
  }

}
class Sync implements Runnable{
  private Data data;
  Sync(Data dt){data = dt;}
  public void run() {
      data.setName();
  }
}

public class SynchronizedMethod{
  public static void main(String[] args) throws Exception{
    Data id = new Data();
    Sync runA = new Sync(id);
    Sync runB = new Sync(id);
    Thread ta = new Thread(runA, "threadA");
    Thread tb = new Thread(runB, "threadB");
    ta.start();
    tb.start();
 }
}