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Java Data Objects (JDO)

Creating a Simple Banking Application

Gopalan Suresh Raj

Note
To work with any of these samples, you will need the following:
.........................................JDK 1.2 or higher (I use JDK 1.3.1)
.........................................PE:JTM - The Productivity Environment for JavaTM (from HYWY Software Corporation)

 

The following file should be located in the Classes Folder that you identified in PE:J

com/hywy/samples/bank/Savings.java
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package com.hywy.samples.bank;


/**
*  Class Description for Savings.java
*
*  @author: gopalan
*  @created date: Apr 16, 2002
*  @last modified date:
*  @version:
*
*/

public class Savings  extends Account {

  /** Attribute   interestRate_ */
  private int interestRate_  ;

  /** Constructor */
  public Savings() {
    super();
    ///////////////////////////////////////////
    //// Start of User's Business Logic    ////
    ///////////////////////////////////////////
    this.accountType_ = SAVINGS_ACCOUNT_;
    ///////////////////////////////////////////
    ////   End of User's Business Logic    ////
    ///////////////////////////////////////////    
  }


  /** Methods Description */
  public int  calculateInterest(  )  throws   java.lang.Exception {
    //return 0;
    ///////////////////////////////////////////
    //// Start of User's Business Logic    ////
    ///////////////////////////////////////////
    if(this.accountType_ != SAVINGS_ACCOUNT_) {
      throw new Exception("Invalid Account Type :"+this.accountType_);
    }
    return this.balance_*this.interestRate_/100;
    ///////////////////////////////////////////
    ////   End of User's Business Logic    ////
    ///////////////////////////////////////////  
  }

  /** Setter Method for field --> interestRate_*/
  public void  setInterestRate_(   int newInterestRate_   ) {
    interestRate_ = newInterestRate_;
  }

  /** Accessor Method for field --> interestRate_ */
  public int  getInterestRate_(  ) {
    return interestRate_;
  }

  /** Default toString() method */
  public java.lang.String  toString(  ) {
    StringBuffer strBuff = new StringBuffer();

    strBuff.append(super.toString());
    strBuff.append(" Savings: ");
    strBuff.append(" interestRate_= " + interestRate_);

    return strBuff.toString();
  }
}

 

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About the Author...
Gopalan Suresh Raj is a Software Architect, Developer and an active Author. He has co-authored a number of books including "Professional JMS", "Enterprise Java Computing-Applications and Architecture" and "The Awesome Power of JavaBeans". His expertise spans enterprise component architectures and distributed object computing. Visit him at his Web Cornucopia site (http://gsraj.tripod.com/) or mail him at gopalan@gmx.net.

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This site was developed and is maintained by Gopalan Suresh Raj

This page has been visited times since February 26,2002.

Last Updated : Feb 26, 2002

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