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    <p>You can create an URLClassLoader to load your newly compiled classes, or you can have a look at a library I wrote which will compile in memory and load into the current class loader by default.</p> <p><a href="http://vanillajava.blogspot.co.uk/2010/11/more-uses-for-dynamic-code-in-java.html" rel="nofollow">http://vanillajava.blogspot.co.uk/2010/11/more-uses-for-dynamic-code-in-java.html</a></p> <p>If you have generated code, it will save the file to a source directory when debugging so you can step into the generated code (otherwise it does everything in memory)</p> <p>You can only load a class once this way so if you need to load many versions I suggest you implement an interface and change the name of the class each time.</p> <pre><code>// this writes the file to disk only when debugging is enabled. CachedCompiler cc = CompilerUtils.DEBUGGING ? new CachedCompiler(new File(parent, "src/test/java"), new File(parent, "target/compiled")) : CompilerUtils.CACHED_COMPILER; String text = "generated test " + new Date(); Class fooBarTeeClass = cc.loadFromJava("eg.FooBarTee", "package eg;\n" + '\n' + "import eg.components.BarImpl;\n" + "import eg.components.TeeImpl;\n" + "import eg.components.Foo;\n" + '\n' + "public class FooBarTee{\n" + " public final String name;\n" + " public final TeeImpl tee;\n" + " public final BarImpl bar;\n" + " public final BarImpl copy;\n" + " public final Foo foo;\n" + '\n' + " public FooBarTee(String name) {\n" + " // when viewing this file, ensure it is synchronised with the copy on disk.\n" + " System.out.println(\"" + text + "\");\n" + " this.name = name;\n" + '\n' + " tee = new TeeImpl(\"test\");\n" + '\n' + " bar = new BarImpl(tee, 55);\n" + '\n' + " copy = new BarImpl(tee, 555);\n" + '\n' + " // you should see the current date here after synchronisation.\n" + " foo = new Foo(bar, copy, \"" + text + "\", 5);\n" + " }\n" + '\n' + " public void start() {\n" + " }\n" + '\n' + " public void stop() {\n" + " }\n" + '\n' + " public void close() {\n" + " stop();\n" + '\n' + " }\n" + "}\n"); // add a debug break point here and step into this method. FooBarTee fooBarTee = new FooBarTee("test foo bar tee"); Foo foo = fooBarTee.foo; assertNotNull(foo); assertEquals(text, foo.s); </code></pre>
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    1. POAfter using JavaCompiler to compiler class files from within another application, how do I then run it?
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    1. USPeter Lawrey
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    1. POAfter using JavaCompiler to compiler class files from within another application, how do I then run it?
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