Solved

java.lang.Compiler?

Posted on 1997-04-18
1
270 Views
Last Modified: 2011-09-20
I'm trying to write a program that loads Java source by class name, compiles it and executes it dynamically.  The problem I an having is that the compiler portion of the code doesn't seem to work.  When I attempt to compile using the java.lang.Compiler class, I get a failure to compile.

Has anyone used this class?  Can you provide some source?
0
Comment
Question by:gutz041897
1 Comment
 

Accepted Solution

by:
professorC earned 200 total points
ID: 1219644
As I understand it the class java.lang.Compiler is for JIT
(Just In Time) compilation to native machine code not for
compiling source to bytecodes. If you are using JDK you can
compile using sun.tools.javac.Main. Here is a code fragment
to do that:
        /* error messages go to System.out, the tool is javac*/
      Main compiler = new Main(System.out, "javac");
        /* comp_args is a String[] of args to javac */
      compiler.compile(comp_args); /* compile it */

      /* load the class YourClass  that was just compiled */
      Class temp_class = Class.forName("YourClass");

      /* finally instantiate */
      SomeInterface object = (SomeInterface)
                                temp_class.newInstance();

This only works if java.tools.javac is available. It is
part of JDK but not part of the java core and may not be
in third party systems.

0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question