Java Comparator Example

Java provides in built support for sorting a list of primitive types… with something like Collections.sort(list). Unfortunately things are not as simple for sorting a list of non-primitive types, since the java collections class doesn’t know exactly how to sort this type of list… let’s take Customer for an example….

Anti-Aliasing in Netbeans

For some time now, the newer version of netbeans, no longer displays the “Advanced Options” that allows for anti-aliased fonts.

DisplayTag & alt=”"

Currently DisplayTag (ver 1.2) does not support the html ‘alt’ attribute… which can be quite annoying at times ! Nonetheless, there now seems to be a way around this…

JSTL to Java Scriplet

When you want to use an EL variable exposed by a JSTL tag in an expression in the page’s scripting language, you use the standard JSP element jsp:useBean to declare a scripting variable.

org.hibernate.AnnotationException: @OneToOne or @ManyToOne on xxx references an unknown entity: xxx

During the process of converting the old hibernate xml heavy structure to the new annotation based structure, the following error was encountered after annotating one of the entity files…

Introduction to Hibernate Annotations

Simple article that describes the minimum steps required to convert a hibernate (and spring) project to start using hibernate annotations.

Exception: [.TableTag] Unable to reset response before returning exported data.

When displaytag exports data in any non-html format, it needs to change the content type returned to the browser and reset any other content generated by the surrounding page.

Sometimes this can’t be done: if content has already been sent back to the user, the response can’t be reset and you get an error. This could happen because too many chars have been already written to the response, so that the response buffer was full and response has been automatically flushed.

Using i18n in the Spring Controllers

This article, in brief, highlights the steps required to make use of i18n (internationalisation) within the controllers (or any other *.java files, for that matter) for an application making use of the spring framework.

Operator Precedence in Java

In an an attempt to print the value of an entity; carelessness in terms of operator precedence can lead to surprising results….

Javascript Tip: ‘Number()’ function

Trying to do a simple number comparison, can be surprising in javascript sometimes. For example…