Re: compiler class

"Jean Pierre Daviau" <Once@WasEno.ugh>
Sun, 31 Dec 2006 08:07:15 -0500
"Andrew Thompson" <> a ?crit dans le
message de news:
Jean Pierre Daviau wrote:

"Gordon Beaton" <> a ?crit dans le message de
news: 4596b037$0$22507$

On Sat, 30 Dec 2006 12:18:48 -0500, Jean Pierre Daviau wrote:

compile a class with a third party compiler.


Sun recommends the following procedure,


Is this possible with jdk1.1.8?

What did your tests indicate?

When I use compileClasses("") I get a class not found
java.lang.ClassNotFoundException: Sample
        at Sketch.compile(
        at Sketch.main(

But I can make with exec (I know I would have to develop the exec
method: using wait etc.)
   Sketch ---------------------------------
"C:\Program Files\Java\jdk1.5.0_10\bin\java" -classpath
..;"C:\Program Files\Java\jdk1.5.0_10\lib\tools.jar" CompileIt

"C:\Program Files\Java\jdk1.5.0_
10\bin\java" -classpath .;"C:\Program
Files\Java\jdk1.5.0_10\lib\tools.jar" CompileIt Sample

public class Sample {
      public static void main(String args[]) {
        System.out.println(new java.util.Date());

import java.lang.reflect.*;
import java.lang.Class;
import java.lang.Compiler;

class Sketch{

 public static void compile(String filename)throws Exception {

 Runtime.getRuntime().exec("javac " + filename);
 String aclass = filename.substring(0, filename.length()-5);

 // compile it
 boolean compileReturnCode =

    // run it
 Object objectParameters[] = {new String[]{filename.substring(0,
 Class classParameters[] = {objectParameters[0].getClass()};
 Class aClass = Class.forName(aclass);
 Object instance = aClass.newInstance();
 Method theMethod = aClass.getDeclaredMethod("main",
 theMethod.invoke(instance, objectParameters);

 public static void main(String[] args)throws Exception {
 String sourceFile = args[0];
 /* 1.2
  System.setProperty("java.compiler", "Jikes");

Note 1: That the compiler will probably only be ableto write the
1.1 class fromat,

good enough

Note 2: That the (very not publicly) documented classes

of the com.sun.* package heirarchy are undocumented
for a variety of reasons, one of which is that Sun
reserved the right to move the 'entry points' to the code
at will. AFAIR - their were a number of changes that
affected the developers of Apache/Tomcat.

Has long has there is nothing personnal against me ;-)


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