Question

I have a problem with ShortBuffer. This is my code:

FileChannel fc = new FileInputStream("C:/Dane DMS/"+names2).getChannel();
ByteBuffer bb = ByteBuffer.allocateDirect((int) fc.size());
while (bb.remaining() > 0) fc.read(bb);
fc.close();
bb.flip();
// choose the right endianness
ShortBuffer sb = bb.order(ByteOrder.BIG_ENDIAN).asShortBuffer();

In this file I have a matrix.

111 222 333 123
444 555 666 456
777 888 999 789
098 765 432 321

I need to change this matrix to:

098 765 432 321
777 888 999 789
444 555 666 456
111 222 333 123

I must change this matrix or create loop that will start from number 098 and end at number 123.

I doesn’t print this matrix. I’m using:

for(int i = 0; i<=1200; i++)
                   {
                       for(int j = 0; j<=1200 ; j++)
                       {

                       }

                   }

to crossing matrix but in this way I start from number 111 and I need start from 098 and end at 123.

Answer 1

You could try this

FileChannel fc = new FileInputStream("C:/Dane DMS/"+names2).getChannel();
ByteBuffer bb = ByteBuffer.allocateDirect((int) fc.size());
while (bb.remaining() > 0) fc.read(bb);
fc.close();
bb.flip();
// choose the right endianness
ShortBuffer sb = bb.order(ByteOrder.BIG_ENDIAN).asShortBuffer();

short[][] Matrix = new short[1201][1201];
for(int i = 0; i<=1200; i++)
{
    for(int j = 0; j<=1200 ; j++)
    {
        Matrix[1200-i][j] = sb.get(i*1201+j);
    }
}