Implicit and Explicit Method Parameters

• The implicit parameter of a method is the object on which the method is invoked
• The this reference denotes the implicit parameter
• Use of an instance field name in a method denotes the instance field of the implicit parameter

  public void withdraw(double amount)
  {
     double newBalance = balance - amount;
     balance = newBalance;
  }

• balance is the balance of the object to the left of the dot:
  

  momsSavings.withdraw(500)

  means
  

     double newBalance = momsSavings.balance - amount;
     momsSavings.balance = newBalance;