get all java code to generate one txt

alljava.py

import os
import glob

def getalljava(folder):
    for file in os.listdir(folder):
        if os.path.isdir(os.path.join(folder, file)):
            getalljava(os.path.join(folder, file))
        elif file.endswith(".java") or file.endswith("java.txt"):
            alljava.append(os.path.join(folder, file))

def main():
    root = os.getcwd()
    #all_project = os.listdir(root)

    #src = [os.path.join(root, s, "src") for s in all_project if os.path.exists(os.path.join(root, s, "src"))]

    #for java in src:
    getalljava(root)

    with open("alljava.txt", "w") as fw:
        for file in alljava:
            with open(file) as f:
                 fw.write("///// " + file)
                 fw.write("\n")
                 fw.write(f.read())
                 fw.write("\n")

if __name__ == '__main__':
   alljava = []
   main()