/* ------------------------------------------------------
   Shadowing instance variables
   ------------------------------------------------------ */

public class BankAccount
{
   public int accNum;             
   public String name;          
   public double balance;      // Shadowed !
 
   /* ==============================================
      convToString(): return a String containing
                        information of BankAccount
      ============================================== */
   public String convToString(  )
   {
      return( "Account number: "  + accNum
           + ", Name: "  + name
           + ", Balance: " + balance);
   }
 
   /* =======================================================
      deposit(balance): Add "parameter balance" to balance
      ======================================================= */
   public void deposit( double balance )     
   {
      this.balance += balance; // Add parameter balance to this.balance
   }

   /* ===============================================================
      withdraw(balance): Subtract "parameter balance" from balance
      =============================================================== */
   public void withdraw( double balance )
   {
      if ( this.balance >= amount )
         this.balance -= balance; // Subtract param balance from this.balance
   }
}