This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
I execute "preverify" , then a message shows up it says "Illegal constant pool index". what does it mean..? the ".class" file has been created ,so the "javac" is fine.. and where I can find the reference about the error message..?
Make sure you're not using any float or double constants such as 3.14 as those aren't supported in MIDP 1.0. If you're compiling with J2SDK 1.4.0 or higher, make sure you specify "-target 1.1" on the javac command line.