java Is there a way to end like C ++ except EOF

Question

EOF is defined for C ++ itself But if there is no EOF in JAVA? Sample picture

Does this answer your question? [reading input till EOF in java](https://stackoverflow.com/questions/13927326/reading-input-till-eof-in-java) — Eggcellentos, Mar 29 '20 at 15:15
or https://stackoverflow.com/questions/36515937/how-to-detect-eof-in-java — Eggcellentos, Mar 29 '20 at 15:18
@ghosh Scanner is line buffered and parses. That is not exactly the OP's wish: reading a byte or end-of-file. — Joop Eggen, Mar 29 '20 at 15:27
This looks to me like it may be relevant: [How to read a single char from the console in Java (as the user types it)?](https://stackoverflow.com/questions/1066318/how-to-read-a-single-char-from-the-console-in-java-as-the-user-types-it/6876253) — Abra, Mar 29 '20 at 15:58

Joop Eggen · Answer 1 · 2020-03-29T15:47:23.433

Java InputStream#read will behave exactly so, returning -1 (C/C++) EOF or an other int in the byte range, unsigned as 0 .. 255.

However String (with Reader and Writer) in java is for Unicode text, char being a 2-byte UTF16 value. Input- and OutputStream and byte is for binary data, needing some encoding (Charset) to convert it to String.

    byte[] read(InputStream in) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int c;
        while ((c = in.read()) != -1) {
            baos.write((byte) c); // Cast not needed, as int.
        }
        return baos.toByteArray();
    }

    String read(InputStream in) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int c;
        while ((c = in.read()) != -1) {
            baos.write((byte) c); // Cast not needed, as int.
        }
        return baos.toString("UTF-8"); // Conversion provided.
    }

java Is there a way to end like C ++ except EOF

1 Answers1