NetBeans ME compiler cannot access java.lang.StringBuilder

[sjandre]

I'm just starting with NetBeans 6.7 having used Sun One Studio for several years.
I have many MIDP projects that run on Siemens' GSM modules, these were compiled on Sun One Studio using "Classic" compiler and a bootclasspath to runtime libraries for the module.

With the new NetBeans I have created a CLDC/MIDP project, and copied my existing source code and Ant scripts.
Attempting to compile generates the following message:


This version of java does not support the classic compiler; upgrading to modern
C:\java\work\Projects61\TC65_Midp\SmsIip\datatypes\MagArgDataType.java:101: cannot access java.lang.StringBuilder
class file for java.lang.StringBuilder not found
+ " Argument = " + Double.toString(arg) + "\r\n" ;
1 error
C:\java\work\Projects61\TC65_Midp\SmsIip\build.xml:86: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 0 seconds)

The runtime library for the device does not contain a StringBuilder class, string concatenation was done differently in earlier versions of Java.
Is there any way to use an old "Java 1.1" or "Classic" style compiler with NetBeans?
I never had any problems before with Sun One Studio.

I'd be grateful for any help

Best regards
Stephen

[sjandre]

I have now found a solution to my problem posted earlier, so I am posting it here as it may benefit someone else.

The problem lay with the Ant script, there are now additional <source> and <target> elements that should be specified within <javac>.

These should have been set to 1.2 and 1.1 respectively. It is more efficient to use magic properties at the start of the Ant script:

<property name="ant.build.javac.source" value="1.2"/>
<property name="ant.build.javac.target" value="1.1"/>

This saves modifying each and every <javac> task.

Regards
Stephen