Create dynamic proxy persistently in Java and ABAP

class HelloWorldImp implements IHelloWorld {
    public void print() {
        System.out.println("Hello World");
    }
}

public class DynamicProxyDemo implements Serializable {
    private static final long serialVersionUID = 1L;

    public static void main(String[] arg) throws Exception {
        Class<?> c = getProxyClass();
        Constructor<?> constructor = c.getConstructor(IHelloWorld.class);
        IHelloWorld helloWorldImpl = new HelloWorldImp();
        IHelloWorld helloWorld = (IHelloWorld) constructor.newInstance(helloWorldImpl);

        helloWorld.print();
    }

    private static String getSourceCode() {
        String src = "package dynamicproxy;\n\n"
                + "public class DynamicProxy implements IHelloWorld\n" + "{\n"
                + "\tIHelloWorld helloWorld;\n\n"
                + "\tpublic DynamicProxy(IHelloWorld helloWorld)\n" + "\t{\n"
                + "\t\tthis.helloWorld = helloWorld;\n" + "\t}\n\n"
                + "\tpublic void print()\n" + "\t{\n"
                + "\t\tSystem.out.println(\"Before Hello World!\");\n"
                + "\t\thelloWorld.print();\n"
                + "\t\tSystem.out.println(\"After Hello World!\");\n" + "\t}\n"
                + "}";
        return src;
    }

    private static String createJavaFile(String sourceCode) {
        // TODO: avoid using absolute file path in productive code
        String fileName = "C:\\Users\\i042416\\git\\JavaTwoPlusTwoEquals5\\src\\dynamicproxy\\DynamicProxy.java";
        File javaFile = new File(fileName);
        Writer writer;
        try {
            writer = new FileWriter(javaFile);
            writer.write(sourceCode);
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return fileName;
    }

    private static void compile(String fileName) {
        try {
            JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
            StandardJavaFileManager sjfm = compiler.getStandardFileManager(null, null, null);
            Iterable<? extends JavaFileObject> iter = sjfm.getJavaFileObjects(fileName);
            CompilationTask ct = compiler.getTask(null, sjfm, null, null, null, iter);
            ct.call();
            sjfm.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static Class<?> loadClass() {
        URL[] urls;
        Class<?> c = null;
        try {
            urls = new URL[] { (new URL("file:\\"
                    + "C:\\Users\\i042416\\git\\JavaTwoPlusTwoEquals5\\src\\")) };
            URLClassLoader ul = new URLClassLoader(urls);
            c = ul.loadClass("dynamicproxy.DynamicProxy");
            System.out.println("Class loaded successfully: " + c.getName());
        } catch (MalformedURLException | ClassNotFoundException e) {
            e.printStackTrace();
        }
        return c;
    }

    private static Class<?> getProxyClass() {
        String sourceCode = getSourceCode();
        String javaFile = createJavaFile(sourceCode);
        compile(javaFile);
        return loadClass();
    }