Condition Objects

• To overcome problem, use a condition object
• Condition objects allow a thread to temporarily release a lock, and to regain the lock at a later time
• Each condition object belongs to a specific lock object
• You obtain a condition object with newCondition method of Lock interface

  public class BankAccount
  {
     public BankAccount()
     {
        balanceChangeLock = new ReentrantLock();
        sufficientFundsCondition = balanceChangeLock.newCondition();
        . . .
     }
     . . .
     private Lock balanceChangeLock;
     private Condition sufficientFundsCondition;
  }