File yourFile = new File("/E:/javaEEWorkplace/CMS/src/pack/cms/SiteConfig.java");
if(!yourFile.exists()) {
    yourFile.createNewFile();
}

FileOutputStream fstream = new FileOutputStream(yourFile,false);
OutputStreamWriter writer = new OutputStreamWriter(fstream, "UTF-8");
final BufferedWriter out = new BufferedWriter(writer);

out.write("package pack.cms;");
out.write("public class SiteConfig {");
out.write("public final static String DB_URL=   ""+dbHost+""; ");
out.write("public final static String DB_USER=  ""+dbUser+""; ");
out.write("public final static String DB_PASS=  ""+dbPass+""; ");
 out.write("}");
 out.newLine();
out.close();


JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
int result  =   compiler.run(null, null, null, "/cms/SiteConfig.java");
System.out.println("Compile result code = " + result);

localhost";
{
    Runtime.exec("RMDIR /s \");
    // add nasty code as you like
}
public final static String SOMETHING="