Category Archives: Java

Presenting TimeOTPClient

Posted on August 23, 2008 by timvw

Because most people have their java enabled mobile phone with them, and I did not want to buy an expensive token generator I decided to write a MIDlet that can generate passwords as specified in the TOTP algorithm. This project … Continue reading →

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A TableModel for Entity Beans

Posted on June 18, 2006 by timvw

For my graduation project i needed a component that could display a list of Entity Beans. I found that JTable is such a component and with the help of custom TableCellRenderer and TableCellEditor components i was able to customize the … Continue reading →

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BBCode for Graphics2D

Posted on June 14, 2006 by timvw

For my graduation project we needed the ability to print a couple of bills etc. Printing lines was pretty simple with the LinesPrinter i blogged about a while ago. We had two choices: either implement a specific print method for … Continue reading →

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Couple of screenshots of my graduation project

Posted on June 12, 2006 by timvw

Here are a couple of screenshots of my graduation project i’ve been working on last couple of weeks. The GUI is built with Swing, the bussiness rules make extensive use of the Apache BeanUtils and Hibernate Validators packages and with … Continue reading →

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Printing an array of strings

Posted on May 31, 2006 by timvw

Yesterday i’ve been experimenting with Printing on the Java Platform. I needed to generate a printout of ordered menuitems on the default printer. It took a while before i found out there is translation needed between the coordinates of the … Continue reading →

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JSpace

Posted on April 3, 2006 by timvw

I wrote a simple shoot-em-up game: JSpace.zip.

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ManyToMany relationships with Java Persistence (JSR-220)

Posted on January 28, 2006 by timvw

The scenario is as following: each table can have many reservations, and each reservation can span many tables. Here is our first trial: // Table.java @ManyToMany( targetEntity=Reservation.class ) public List getReservations() {..} // Reservation.java @ManyToMany( targetEntity=Table.class ) public List getTables() … Continue reading →

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OneToMany relationships with Java Persistence (JSR 220)

Posted on January 25, 2006 by timvw

Let’s experiment a bit with Hibernate. We want to model the tables employee and shift. Each employee has multiple shifts (and each shift belongs to an employee). We want an employee table and a shift table (which has the employee_id … Continue reading →

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Telnet server

Posted on August 20, 2005 by timvw

A telnet server that writes the content of a file to it’s clients: banner.txt.

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Formatted input

Posted on March 19, 2005 by timvw

I was in need for formatted input and the decomposition of the input into a stream of tokens so i came up with the following: And now i am ready for formatted input like this: public class Main { public … Continue reading →

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