SynchronizationDemo2.java

// SynchronizationDemo2.java
class SynchronizationDemo2
{
   public static void main (String [] args)
   {
      FinTrans ft = new FinTrans ();
      TransThread tt1 = new TransThread (ft, "Deposit Thread");
      TransThread tt2 = new TransThread (ft, "Withdrawal Thread");
      tt1.start ();
      tt2.start ();
   }
}
class FinTrans
{
   private String transName;
   private double amount;
   synchronized void update (String transName, double amount)
   {
      this.transName = transName;
      this.amount = amount;
      System.out.println (this.transName + " " + this.amount);
   }
}
class TransThread extends Thread
{
   private FinTrans ft;
   TransThread (FinTrans ft, String name)
   {
      super (name); // Save thread's name
      this.ft = ft; // Save reference to financial transaction object
   }
   public void run ()
   {
      for (int i = 0; i < 100; i++)
          if (getName ().equals ("Deposit Thread"))
             ft.update ("Deposit", 2000.0);
          else
             ft.update ("Withdrawal", 250.0);
   }
}