Compile a Java file… with a Java program

Question

Is it possible for a program written in Java to compile a file using the JDK compiler (aside from using Java to open command prompt and throw the "javac" command at it to compile the file)?

Answer 1

In Java 6 and onwards there is an API to use the compiler. This might be what you are looking for.

http://www.javabeat.net/2007/04/the-java-6-0-compiler-api/

http://docs.oracle.com/javase/6/docs/api/javax/tools/JavaCompiler.html

Note that you need a JDK to have the compiler available. JRE will not be enough. If that is a problem consider embedding the Eclipse Java compiler in your application.

Answer 2

Java 6 has a Compiler API Check out Java Compiler Class Javadoc

http://docs.oracle.com/javase/6/docs/api/javax/tools/JavaCompiler.html

and an example

http://www.javabeat.net/2007/04/the-java-6-0-compiler-api/

Answer 3

The Apache Byte Code Engineering Library is your friend.

http://commons.apache.org/bcel/