public class ByteArrayTest {

    public static void main(String[] args) throws IOException {
        read(write());
    }
    
    //read
    public static void read(byte[] b) throws IOException{
        InputStream is = new BufferedInputStream(new ByteArrayInputStream(b));
        byte fush[] = new byte[1024];
        int len = 0;
        while((len=is.read(fush))!=-1){
            System.out.println(new String(fush, 0,len));
        }
        is.close();
    }
    
    //write
    public static byte[] write() throws IOException{
        
        String s = "what the fuck write";
        byte[] b = s.getBytes();
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        
        int len=b.length;
        out.write(b, 0, len);
        
        byte[] bytes = out.toByteArray();
        out.close();
        return bytes;
    }

}