Jan 3, 2021 · Dec 30, 2020
diff --git a/src/main/java/ev3dev/utils/DataChannelRereader2.java b/src/main/java/ev3dev/utils/DataChannelRereader2.java
            // try to do the read
            // only one try, as:
            // - value >0 indicates success
            // - value =0does not tell us much, as there's a possibility of reading anempty attribute
            // - value <0 indicatesfailure
            // - value =0indicatesempty attribute (???)
            // - value <0 indicatesempty attribute
            int n = channel.read(buffer, 0);
            if (n == -1) {
                throw new IOException("Premature end of file " + path);
            // minus one reliably occurs on empty file, zero should be similar
            if (n <= 0) {
                return "";
            }

            // strip trailing newline & return data as a string
            // rationale: ev3dev sysfs often appends \n, but this breaks parseFloat/parseInt/...
            byte[] bytes = buffer.array();
            if (n > 0 &&bytes[n - 1] == '\n') {
            if (bytes[n - 1] == '\n') {
                return new String(bytes, 0, n - 1, StandardCharsets.UTF_8);
            } else {
                return new String(bytes, 0, n, StandardCharsets.UTF_8);
Original file line number	Diff line number	Diff line change
Expand Up		@@ -90,17 +90,18 @@ public String readString() {
		// try to do the read
		// only one try, as:
		// - value >0 indicates success
		// - value =0does not tell us much, as there's a possibility of reading anempty attribute
		// - value <0 indicatesfailure
		// - value =0indicatesempty attribute (???)
		// - value <0 indicatesempty attribute
		int n = channel.read(buffer, 0);
		if (n == -1) {
		throw new IOException("Premature end of file " + path);
		// minus one reliably occurs on empty file, zero should be similar
		if (n <= 0) {
		return "";
		}

		// strip trailing newline & return data as a string
		// rationale: ev3dev sysfs often appends \n, but this breaks parseFloat/parseInt/...
		byte[] bytes = buffer.array();
		if (n > 0 &&bytes[n - 1] == '\n') {
		if (bytes[n - 1] == '\n') {
		return new String(bytes, 0, n - 1, StandardCharsets.UTF_8);
		} else {
		return new String(bytes, 0, n, StandardCharsets.UTF_8);
Expand Down