Where is java.util.Formatter?

Question

Java 1.5 supposedly introduced java.util.Formatter, which gives us a printf().
Running 'java -version' from the Terminal gives the following:
+java version "1.5.0_16"+
+Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b06-284)+
+Java HotSpot(TM) Client VM (build 1.5.0_16-133, mixed mode, sharing)+
When Xcode compiles this:
import java.util.Formatter;
System.out.printf("%s lives!\n", "Foo");
It gives a "cannot find symbol" error for the printf line.
Anybody know why?
Thanks,
Chap
Mac OS X 10.5.6
Xcode 3.1.2
<rhetorical>And who ever thought that "cannot find symbol" was a sufficient error message?</rhetorical>

Answer 1

Hi
When you use Xcode, you need to modify the Ant XML file to tell it to use Java 1.5. By default, it reverts to some hideously obsolete early version of Java.
The file to modify is called build.xml and you need to edit the source and target version, thus:
<javac deprecation="on" srcdir="${src}" destdir="${bin}"
source="1.5" target="1.5"
includeAntRuntime="no"
classpathref="lib.path" debug="${compile.debug}">
</javac>
The "cannot find symbol" message is distinctly unhelpful. If you select Build > Build Results from the menu, then a new window opens. On the middle line of this window there's a row of icons, with a tick, a yellow triangle, some rows of lines, and a black triangle. If you click on the third icon (the rows of lines) then the messages from the compiler are revealed. These are much more helpful.
Bob