javainputstreambytebuffer

Java InputStream to ByteBuffer

I am reading dds textures, but since once built the jar I can't access those textures through url and file and have to use InputStream instead.

So I would need to know how I can obtain a java.​nio.ByteBuffer from an java.io.InputStream.

Ps: no matter through 3rd part libraries, I just need it working

Solution

  • For me the best in this case is Apache commons-io to handle this and similar tasks.

    The IOUtils type has a static method to read an InputStream and return a byte[].

    InputStream is;
byte[] bytes = IOUtils.toByteArray(is);

    Internally this creates a ByteArrayOutputStream and copies the bytes to the output, then calls toByteArray().

    UPDATE: as long as you have the byte array, as @Peter pointed, you have to convert to ByteBuffer

    ByteBuffer.wrap(bytes)

    JAVA 9 UPDATE: as stated by @saka1029 if you're using java 9+ you can use the default InputStream API which now includes InputStream::readAllBytes function, so no external libraries needed 

    InputStream is;
byte[] bytes = is.readAllBytes()