Class SyncConstructor

concurrent/SynchronizedConstructor.java:7–17

import java.util.concurrent.atomic.*;

class SyncConstructor implements HasID {
  private final int id;
  private static Object
    constructorLock = new Object();
  SyncConstructor(SharedArg sa) {
    synchronized(constructorLock) {
      id = sa.get();
    }
  }
  @Override public int getID() { return id; }
}

public class SynchronizedConstructor {
  public static void main(String[] args) {