// this is the path of the folder containing the synthesized java
// classes
final File folder = new File("./compilable_code_snippets");
// this the list that will contain the code snippets
ArrayList<CGroup> data = new ArrayList<CGroup>();
// com.google.gson.Gson library
final Gson gson = new Gson();
// scan all code snippets json files
System.out.println("Loading compilation groups from file.....");
for (final File f : folder.listFiles()) {
	if (!f.isFile() || !f.getName().endsWith(".json"))
		continue;
	try {
		final BufferedReader br = new BufferedReader(new FileReader(f));
		ArrayList<CGroup> newList = gson.fromJson(br,
				new TypeToken<ArrayList<CGroup>>() {
		}.getType());
		// you can either process individually or load all in memory
		data.addAll(newList);
	} catch (final IOException e) {
		e.printStackTrace();
	}
}

// now all the compilable java files are loaded in the list "data"

System.out.println("Completed!   "+ data.size() + " c-groups are loaded in memory");
// scan the result
for (CGroup cg : data) {
	// A Cgroup is a collection of compilation units from a single
	// stackoverflow post
	// each c-group has the unique ID of the stackoveflow post
	Integer id = cg.answerId;
	// it has also a classpath of the referenced external jars.
	// Note that we excluded the jars of the jdk_1.7 as we assume they
	// are always in the classpath
	// Note that we used the path separator of Win ";"
	String classPath = cg.classPath;
	// you can scan each c-units of the current c-group
	for (CUnit cu : cg.units) {
		// if you want to generate the file className field speicify the
		// fileName.
		String className = cu.className;
		String fileName = className + ".java";
		// you can get the import declaration to select those java files
		// using some particular library
		HashSet<String> importDecalrations = cu.imports;
		// IMPORTANT to generate the Java file please use this method invocation
		String fileContent = cu.getStringCode();
		// you can write this on file
		// note that the default package is "test"
	}

}