How to create jar programmatically?

Question

Java

I want to write a compiler for a simple language into jvm bytecode. But it is necessary that the output is one executable file, i.e. jar. How can I package compiled classes into a jar programmatically?

Answer 1

The JDK has a standard JarOutputStream class to help you. Here is an example of writing to a JarOutputStream along with a manifest.

Answer 2

Use Maven to build your project.