You can also use data types such as floating-point Boolean character bytes.

write float(val)；

Write boolean value (val)

Write character (val)

data inputstream dis = new data inputstream(s . getinputstream())；

int r = dis . readint()； //receive int

The data sent by socket is only binary. . . But at least one byte (char/byte) is sent at a time, that is, 8 bits of data are transmitted.

Receive hexadecimal. = = & gtbyte r = dis . read byte()；

Send hexadecimal. = => byte r= (byte) 0xffdos. writebyte (r);