split string java

Question

duplicate: http://stackoverflow.com/questions/527595/split-string

hi, i'm have string like this

200209151422010231.10408360.00502240.105090.0200209151423010231.10408360.00502289.605090.0

i want to split this

200209151422010231.10408360.00502240.105090.0
200209151423010231.10408360.00502289.605090.0

and store int Array when 0x01 value occurs in the string b'coz string length is not fixed. i have done splitting like this char 0x01; String packetArray[] = packets.split(packets,sp); but its showing array size 1 only means its not splitting the data,plz help me to solve the problem.

i want to split string by hexadecimal value not by dot or any charecter

thank u for reply.

Answer 1

Why would you split by character U+0001? Don't you want to split by dot? Or are you using a dot in the question everywhere you'd actually have U+0001? Even so, it should still work if you use String.split correctly:

public class Test
{
    public static void main(String args[]) throws Exception
    {
        char delimiter = 1;

        String test = "first" + delimiter + "second";

        String[] bits = test.split(String.valueOf(delimiter));
        System.out.println(bits.length);
    }
}

Prints 2.

Note that your use of String.split is wrong at the moment - you're trying to use the whole text as a delimiter! I suspect if you do:

String packetArray[] = packets.split(String.valueOf(sp));

you may find it just works immediately.

Answer 2

I'd think twice about using split since those are obviously fixed width fields.

I've seen them before on another question here (several in fact so I'm guessing this may be homework (or a popular data collection device :-)) and it's plain that the protocol is:

• STX (0x01).
• 0x0f.
• date (YYMMDD or DDMMYY).
• time (HHMMSS).
• 0x02.
• value (XXXXXX.X).
• 0x03.
• 0x04.

And, given that they're fixed width, you should probably just use substrings to get the information out.