RandomAccessFile.write: EBADF (Bad file descriptor)

Question

I'm getting java.io.IOException: write failed: EBADF (Bad file descriptor) when trying to write a RandomAccessFile .

    RandomAccessFile raf;
    try {
        raf = new RandomAccessFile("foo", "r");
        byte bytes[] = "test".getBytes(StandardCharsets.US_ASCII);
        raf.write(bytes);
        raf.close();
    } catch (FileNotFoundException e){
    } catch (IOException e){
    }

Why do I get this exception?

Answer 1

创建RandomAccessFile时使用“rw”而不是“r”。