Is it necessary to close a FileWriter, provided it is written through a BufferedWriter?

Question

Consider a BufferedReader as below:

writer = new BufferedWriter(new FileWriter(new File("File.txt"), true));

In this case at the end of the application, I am closing the writer with writer.close()

Will this be enough? Won't that FileWriter created with new FileWriter(new File("File.txt"), true) need to be closed?

Answer 1

It is not necessary to close it, because BufferedWriter takes care of closing the writer it wraps.

To convince you, this is the source code of the close method of BufferedWriter:

public void close() throws IOException {
    synchronized (lock) {
        if (out == null) {
            return;
        }
        try {
            flushBuffer();
        } finally {
            out.close();
            out = null;
            cb = null;
        }
    }
}