noobie question to create a string from other strings

phinsil6

noobie question to create a string from other strings

in Contributed Library Questions • 7 months ago

Hi, I am having a problem with creating strings in processing. Basically I have data coming in that is an integer and I would like to concatenate it with existing characters. And then send that string out in a UDP packet to an arduino. so overall i am having a simple data conversion problem with conversion between strings, and string arrays. I'm pretty sure i dont want it to be a string array because it wont send correctly. I have posted the code i have so far below:

import oscP5.*; // Load OSC P5 library
import netP5.*; // Load net P5 library
import processing.serial.*; // Load serial library
import hypermedia.net.*;
UDP udp; // define the UDP object
String ip = "192.168.1.177"; // the remote IP address
int port = 8888; // the destination port
int xsize = 100;
int ysize = 100;
int NUM_PWM_PINS = 6;
String addr;
float val;
float [] fader = new float[NUM_PWM_PINS];
float [] m = new float[NUM_PWM_PINS];
int [] x = new int[NUM_PWM_PINS];
int i;
int [] pin = {3,5,6,9,10,11};
int j;
int [] toggle = {0,0};
char arduinoID = '1';
char command = 'A';
char terminator = '@';
String [] commands = {"A", "a", "D", "d"};
String [] pins = {"03", "05", "06", "09", "10", "11"};
OscP5 oscP5; // Set oscP5 as OSC connection
void setup()
{
size(xsize,ysize); // Processing screen size
oscP5 = new OscP5(this,8000); // Start oscP5, listening for incoming messages at port 8000
udp = new UDP( this, 6000 ); // create a new datagram connection on port 6000
//udp.log( true ); // <-- printout the connection activity
udp.listen( true ); // and wait for incoming message
}
void oscEvent(OscMessage theOscMessage)
{
addr = theOscMessage.addrPattern();
if(addr.indexOf("/1/fader") !=-1)
{ // Filters out any toggle buttons
i = int((addr.charAt(8) )) - 49;
fader[i] = theOscMessage.get(0).floatValue();
x[i] = int(map(fader[i], 0, 1, 0, 255)); //a value from 0-255 #####This is the value I want to concatenate ########characters labeled above as 'handshake', ' command', and 'pin' number
if (toggle[j] == 1)
{
//udp.send("!A12000@", ip, port); //this is an example of what needs to be sent from this program with the value of "200" being the integer of x[i]
}
if (toggle[j] == 0)
{
//udp.send("A06255@", ip, port); //this is an example of what needs to be sent from this program with the value of "255" being the integer of x[i]
}
}
if(addr.indexOf("/1/toggle") !=-1)
{
j = int((addr.charAt(9) )) - 49;
toggle[j] = int(theOscMessage.get(0).floatValue());
println(toggle[j]);
}
}
void draw()
{
background(255);
if (toggle[0] == 1)
{
fill(x[0],x[1],x[2]);
ellipse((xsize/2-xsize/4), ysize/2, xsize/4,ysize);
}
else if(toggle[1] == 1)
{
fill(x[3],x[4],x[5]);
ellipse((xsize/2+xsize/4), ysize/2, xsize/4, ysize);
}
else
{
for(i=0; i<6; i=i+1)
{
m[i]=0;
}
}
}
/*void receive( byte[] data )
{ // <-- default handler
//void receive( byte[] data, String ip, int port ) { // <-- extended handler
for(int i=0; i < data.length; i++)
print(char(data[i]));
println();
}*/

Replies(9)

Chrisir

Re: noobie question to create a string from other strings

7 months ago

a slow easy idea:

String[] x = {
"ggs", "jkh", "kj"
};
String result="";
//
for (int i=0; i<x.length; i++) {
result+=x[i];
}
println (result);
//

Chrisir

Re: noobie question to create a string from other strings

7 months ago

or see
http://www.processing.org/reference/join_.html

Chrisir

Re: noobie question to create a string from other strings

7 months ago

or quoting benja

The class String has a own concat-function, so you can call it on every String-variable.

newString = oneString.concat(otherString);

PhiLho

Re: noobie question to create a string from other strings

7 months ago

Note: I moved the topic from Programming Questions, because we cannot run your code unless we have the proper libraries.
If you have a simple Java question, make a simple program just isolating the specific problem you have.

" i am having a simple data conversion problem with conversion between strings, and string arrays."
The request is vague, and we don't where in your program you have such problem.

Perhaps the solution can be as simple as:
int x = 25;
String s = "foo";
String r = s + x;
println(r);

Or perhaps it is more complex...

phinsil6

Re: noobie question to create a string from other strings

7 months ago

I would really appreciate it if you could stop moving my questions to other forums.

The problem really is a simple one, I have an integer, say a number 255 that I would like to convert to a string and concatenate with other characters, to form one giant string. it has nothing to do with other contributed libraries.

i have tried both concat and join functions with no success.

PhiLho

Re: Re: noobie question to create a string from other strings

7 months ago

" I would really appreciate it if you could stop moving my questions to other forums."
Just follow the rules, I wouldn't need to move them!

Avoid to hide simple problems with complex code requiring unneeded libraries (for this specific problem), you would get quick and accurate answers...

And, well, it looks like I answered your question, no?

Chrisir

Re: noobie question to create a string from other strings

7 months ago

here...

//
int i = 3;
char c = 'c';
String s = "hello";
//
String result = "";
//
result += str(i);
result += str(c);
result += s;
//
println (result );
//

phinsil6

Re: noobie question to create a string from other strings

7 months ago

both of the methods you have posted seem to work, thank you very much :)

Chrisir

Re: noobie question to create a string from other strings

7 months ago

That's good to hear!

Top Reply