CODEWITHSUNDEEP
javaintegerbyteendianness
Yss
Yss

Reputation: 111

Read 16Bit Integer from 2 bytes big endian

I'm trying to following up this tutorial about reading altitude from srtm-data. At the end I have to read 2 bytes from a file, which are big-endian and have to convert them to an integer in java.

File file = new File(filename);
InputStream inputStream = new FileInputStream(file);
long length = file.length();
byte[] bytes = new byte[(int) length];

inputStream.read(bytes);
inputStream.close();

byte[] byteArr = new byte[2];
byteArr[0] = bytes[pos];
byteArr[1] = bytes[pos+1];

int height = ByteBuffer.wrap(byteArr).order(ByteOrder.BIG_ENDIAN).getInt();

The problem is I'm getting an

java.nio.BufferUnderflowException

because java is expecting more bytes. How can I convert these two bytes to an integer?

Upvotes: 0

Views: 2344

Answers (1)

Gary Wright
Gary Wright

Reputation: 2469

An integer is comprised of 4 bytes, so your byteArr needs to have 4 elements, not 2:

byte[] byteArr = new byte[4];

Upvotes: 1

Related Questions