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POHow to compile multiple Java classes in one go using the JavaCompiler API
 

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  1. POHow to compile multiple Java classes in one go using the JavaCompiler API
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    <p>I am new to java and I am following <a href="http://www.javabeat.net/2007/04/the-java-6-0-compiler-api/" rel="nofollow">this tutorial</a> as it is very informative and explains everything in great detail. At the bottom of the tutorial it explains how a JavaFileManager can be used to compile multiple java files and gives a few examples of this but i still cant get it to compile multiple files myself</p> <p>Another problem is that in the example it only ever shows how to compile one java file (which i can already get working) but it is the multiple files that i am having a problem with as i want to be able to compile projects made up of multiple java classes in my own system</p> <p>This is what i have to the moment:</p> <pre><code>public static void main(String[] args) throws Exception { JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); // Line 1. MyDiagnosticListener listener = new MyDiagnosticListener(); // Line 2. StandardJavaFileManager fileManager = compiler.getStandardFileManager( listener, null, null); // Line 3. String fileToCompile = "test" + File.separator + "ManyErrors.java"; // Line 4 Iterable fileObjects = fileManager.getJavaFileObjectsFromStrings(Arrays .asList(fileToCompile)); // Line 5 CompilationTask task = compiler.getTask(null, fileManager, listener, null, null, fileObjects); // Line 6 Boolean result = task.call(); // Line 7 if (result == true) { System.out.println("Compilation has succeeded"); } } class MyDiagnosticListener implements DiagnosticListener { public void report(Diagnostic diagnostic) { System.out.println("Code-&gt;" + diagnostic.getCode()); System.out.println("Column Number-&gt;" + diagnostic.getColumnNumber()); System.out.println("End Position-&gt;" + diagnostic.getEndPosition()); System.out.println("Kind-&gt;" + diagnostic.getKind()); System.out.println("Line Number-&gt;" + diagnostic.getLineNumber()); System.out.println("Message-&gt;" + diagnostic.getMessage(Locale.ENGLISH)); System.out.println("Position-&gt;" + diagnostic.getPosition()); System.out.println("Source" + diagnostic.getSource()); System.out.println("Start Position-&gt;" + diagnostic.getStartPosition()); System.out.println("\n"); } </code></pre>
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    1. USTom Anderson
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    1. COYou are new to Java, yet you want to dynamically compile Java classes? I don't think that's a good idea, dynamic compiling classloading is a very advanced topic.
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      1. USSean Patrick Floyd
    2. COWell im quite experienced in C programming and over the last few weeks have changed so I can work with Java also so I understand all the concepts and everything, thats grand out
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