Category Archives: Java
Make “Duke’s Bank” J2EE demo app work on JBoss 4.2.0.GA
I was trying to learn a bit about JBoss AS by following their Getting Started doc/tutorial.
When I got up to Chapter 4, which involves building and deploying the “Duke’s Bank” application from Sun’s J2EE tutorial to JBoss, I ran into errors when trying to compile.
~/j2eetutorial14/examples/bank$ ant -f jboss-build.xml compile | head Buildfile: jboss-build.xml prepare: compile: [javac] Compiling 61 source files to /Users/marca/j2eetutorial14/examples/bank/build [javac] /Users/marca/j2eetutorial14/examples /bank/src/com/sun/ebank/web/template/DefinitionTag.java:31: package javax.servlet.jsp does not exist [javac] import javax.servlet.jsp.JspTagException;
To fix this, I edited jboss-build.xml
as follows:
--- jboss-build.xml.2007-06-21-102200 2007-06-21 10:18:55.000000000 -0700 +++ jboss-build.xml 2007-06-21 10:22:14.000000000 -0700 @@ -20,7 +20,7 @@ <path id="build.classpath"> <path refid="client.classpath"/> <fileset dir="${jboss.server}/lib/"> - <include name="javax.servlet*.jar"/> + <include name="*.jar"/> </fileset> </path>
Later on in the tutorial, you are directed to run an Ant task to display some newly inserted rows in the hsql database.
~/j2eetutorial14/examples/bank$ ant -f jboss-build.xml db-list Buildfile: jboss-build.xml db-list: [java] ScriptTool.init error: sql/hsql-list.sql (No such file or directory) [java] java.io.FileNotFoundException: sql/hsql-list.sql (No such file or directory)
For some reason, I didn’t have the hsql-list.sql
file. So I created one with SELECT * FROM account;
as its contents.
Aside from these hiccups, the the tutorial worked fine.
Ruby and Java and Stuff
Steve Yegge, interesting as always:
Developing Java Applications on Mac OS X with Eclipse
I guess today I’ve just gotten on to a kick of learning new programming tools and environments.
I just did Apple’s Developing Java Applications on Mac OS X with Eclipse Tutorial.
This tutorial was pretty interesting to me because it revealed some more of the power of Eclipse. Here’s an outline of what is covered in the tutorial:
- Creating a simple Java project in Eclipse from scratch
- Creating a class in Eclipse
- Using the Code assist feature
- Using the refactoring features to move a class to a different package
- Creating a Java Swing project in Eclipse by importing from an Xcode project
- Importing a project from Xcode into Eclipse
- Customizing Java compiler warnings
- Customizing Java code formatting
- Using the refactoring features extract a method from some lines of code
- Using the folding features
- Creating a Java SWT project
- How to setup a SWT project and run it
Now I wonder if I can get Eclipse running on FreeBSD… Even better if I could manage to create a Native Eclipse built with gcj. It’s been done on Linux – I wonder if it could be done on FreeBSD…
This is why C++ templates are evil
stlfilt helps, but it doesn’t always save you from template hell.
comaofferimagegeneratorlib.cpp:149: cannot convert `it.Mdbm<_comaofferid ,ImageData *>::iterator::operator ->()-> pair::key_type, Mdbm<_comaofferid ,ImageData *>::data_type>::second' from type `Mdbm<_comaofferid ,ImageData *>::data_type' to type `ImageData *'
It’s not impossible to interpret this, but it isn’t exactly a walk in the park either.
It’s times like these that make me appreciate the utter simplificity of Java and its container classes – by making every object inherit from a common base class (Object) and making containers that contain references to objects of that base class, you get a simple, elegant container mechanism. C++, not having a common base class, resorts to templates – a nifty but sometimes very irritating feature.