バイトストリーム配列変換

public short getShort(byte[]array,int index) { 
        return (short) (array[index] << 8 | array[index + 1] & 0xFF); 
    } 


    public int getUnsignedMedium(byte[]array,int index) { 
        return  (array[index]     & 0xff) << 16 | 
                (array[index + 1] & 0xff) <<  8 | 
                array[index + 2] & 0xff; 
    } 


    public int getInt(byte[]array,int index) { 
        return  (array[index]     & 0xff) << 24 | 
                (array[index + 1] & 0xff) << 16 | 
                (array[index + 2] & 0xff) <<  8 | 
                array[index + 3] & 0xff; 
    } 


    public long getLong(byte[]array,int index) { 
        return  ((long) array[index]     & 0xff) << 56 | 
                ((long) array[index + 1] & 0xff) << 48 | 
                ((long) array[index + 2] & 0xff) << 40 | 
                ((long) array[index + 3] & 0xff) << 32 | 
                ((long) array[index + 4] & 0xff) << 24 | 
                ((long) array[index + 5] & 0xff) << 16 | 
                ((long) array[index + 6] & 0xff) <<  8 | 
                (long) array[index + 7] & 0xff; 
    } 


    public void setShort(byte[]array,int index, int value) { 
        array[index]     = (byte) (value >>> 8); 
        array[index + 1] = (byte) value; 
    } 


    public void setMedium(byte[]array,int index, int   value) { 
        array[index]     = (byte) (value >>> 16); 
        array[index + 1] = (byte) (value >>> 8); 
        array[index + 2] = (byte) value; 
    } 


    public void setInt(byte[]array,int index, int   value) { 
        array[index]     = (byte) (value >>> 24); 
        array[index + 1] = (byte) (value >>> 16); 
        array[index + 2] = (byte) (value >>> 8); 
        array[index + 3] = (byte) value; 
    } 


    public void setLong(byte[]array,int index, long  value) { 
        array[index]     = (byte) (value >>> 56); 
        array[index + 1] = (byte) (value >>> 48); 
        array[index + 2] = (byte) (value >>> 40); 
        array[index + 3] = (byte) (value >>> 32); 
        array[index + 4] = (byte) (value >>> 24); 
        array[index + 5] = (byte) (value >>> 16); 
        array[index + 6] = (byte) (value >>> 8); 
        array[index + 7] = (byte) value; 
    }