Its nice you'r here to start Java. As u'v already read an advice,
try using a newer version of jdk.

Even you are using this one, for windows 98 JDK comes as an
installable exe file, you just run and it sets it up.

To write a program, use a simple text editor, write your code
* Make sure your class name is same as your file name with .java
extention

* Then run the compiler (...jkd1.2\bin\javac <ur filename>.java )


by the way its better to be more specific in ur question...