How to compile a single Java file

Question

I have searched this, but I could\'n find or understand what I found.
Now I\'m not a Java programmer, but I have the need to compile a single Java file into an existing

Answer 1

As far as I can understand you want to re-compile a single java file and replace it in an existing jar file..

So you compile it..

cmd>javac -classpath jar1.jar;jar2.jar my.company.MyClassToReplace.java

and replace it in the jar.

cmd>jar uf myJarFile.jar my/company/MyClassToReplace.class