Weird things I found when installing J2ME

Question

I downloaded a bundle of tools for J2ME: midp1.0.3 and cldc1.0. I use Windows 98 and Mandrake 9.2 separately in my PC.
I then tried to install J2ME into both, then here's what I found when I tried to run MIDlets:
1. In Windows 98, I compiled my *.java by the command 'javac' and it worked.
Then, I had to preverify it before running the classes (the executables) on an
emulator, didn't I? But, when I preverified it, an error message came out, saying
Error loading class : illegal constant pool index.
2. In Mandrake 9.2, I compiled my *.java by the command 'javac' and it worked.
Then, I preverified it, but this time, it worked. Wow! But then, when I ran it on an
emulator, an error message came out, saying
ALERT : Could not load required font
Segmentation fault
Then, I copied these classes to Windows 98 C:\ direcory and guess what ...
when I ran then, it worked well on the emulator.
This is kinda funny. I now begin to write the Java code in Mandrake, compile it, preverify it, and then move the classes to Windows to run in its emulator.
Can someone help me out of this trouble? It seems so time-consuming to do this, doesn't it?

Answer 1

I ran into the same font problem using Suse 9.2. Some digging into the source code revealed that the midp application tries loading fonts in sizes 9, 11, and 15, which don't exist. The standard font sizes in Suse (at least for adobe-helvetica) are 8,10,12,14,18, and 24.
To fix this, edit midp2.0fcs/src/solaris/native/text.c. Around line 80, there is a line with:
int height = "\011\013\017"[sizeKey];
For using slightly smaller fonts, change this to:
int height = "\010\012\016"[sizeKey];
If you want to use slightly larger fonts (except for the large size, change it to):
int height = "\012\014\017"[sizeKey];
Then go to build/linux/kvm, and run "make clean all". The generated kvm (build/linux/kvm/bin/kvm) works without errors for me.