Native Threads Pack for JDK 1.2 ------------------------------- The file ntp.tar.gz is an add-on to the basic jdk12_pre-v1.tar.gz package. Once you have downloaded and installed jdk12_pre-v1, you can add native threads support (beta quality due to old linuxthreads 0.5 in glibc 1.99) by downloading ntp.tar.gz and unpacking it as follows: cd jdk12_pre-v1/ tar -zxvf ntp.tar.gz To force the java compiler to use native threads simply add the -native flag to the java command invocation: java -native XXXXXXXX