But is it ideal for a "Hello, world" program to follow all best-practices? In my opinion, a "Hello, world" program should do the bare minimum to print "Hello, world" to the screen, and no more, so that it represents the language at its most basic.
class MyApp extends AndroidApp {
void main() {
Document.write("hello world");
Document.write("<button id=\"foo\">blah</button>");
}
}
Ant? Maven?
Yeah I know it doesn't work like this now, but the designers of the entire Java/Android ecosystem should have designed it to be that simple.
The moment you get any of these build systems involved you instantly lose all hopes of DRY coding. Excerpts from an Ant build.xml file:
<target name="jar" depends="compile">
<mkdir dir="jar" />
<jar destfile="jar/HelloWorld.jar" basedir="classes">
<manifest>
<attribute name="Main-Class"
value="antExample.HelloWorld" />
</manifest>
</jar>
</target>
<target name="run" depends="jar">
<java jar="jar/HelloWorld.jar" fork="true" />
</target>