[Java] Bytedaten einlesen und konvertieren (Little Endian / Big Endian)

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public boolean LoadBinaryData(String filename) throws IOException
{
    boolean bRetVal = false;

    FileInputStream fis = null;
    DataInputStream dis = null;
    
    try
    {
        File f = new File(filename);
              
        if (f.isFile() && f.canRead())
        {
            fis = new FileInputStream(filename);
            dis = new DataInputStream(fis);
            
            // Bsp.: 8 Bytes als Double lesen
            byte[] Test1 = new byte[8];
            dis.read(Test1);
            
            double a = ByteBuffer.wrap(Test1).order(ByteOrder.LITTLE_ENDIAN).getDouble();

            System.out.println(a);

            // Bsp.: 4 Bytes als Float lesen
            byte[] Test2 = new byte[4];
            dis.read(Test2);
            
            float b = ByteBuffer.wrap(Test2).order(ByteOrder.LITTLE_ENDIAN).getFloat();

            System.out.println(b);

            // Bsp.: 2 Bytes als Short lesen
            byte[] Test3 = new byte[2];
            dis.read(Test3);
            
            short c = ByteBuffer.wrap(Test3).order(ByteOrder.LITTLE_ENDIAN).getShort();

            System.out.println(c);
            
            bRetVal = true;
        }
    }
    catch (Exception e)
    {
         e.printStackTrace();
    }
    finally
    {
         if (fis != null) fis.close();
         if (dis != null) fos.close();
    }
    
    return bRetVal;
}