public void write(int i) {
try {
out.write(i);
out.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
public void writeString(String s) {
int len = s.length();
byte[] buf = new byte[len];
for (int i = 0; i < buf.length; i++) buf[i] = (byte) s.charAt(i);
try {
write(len);
out.write(buf);
out.flush();
} catch (IOException e) {
e.printStackTrace();
}
}