Java Serial Processing

[prashbabu123]

Hey,
Im trying to work on java serial processing. Trying to get this code to work.. But im having issues.. IM trying to compile this from the terminal. I added serial.jar to the CLASSPATH..but i still get errors..

// This Processing example reads byte-values from the serial
// port at 9600 bits-per-second (bps). It uses these values
// to set the color of a square on the canvas.
// Also, if the mouse moved, its relative x-position (0..7)
// is sent over the serial port.


import processing.serial.*; // load serial library
Serial p; // declare serial port object


void setup()
{
size(200, 200);
noStroke();
framerate(10);

// open the port that the Wiring board is connected to (in my case 2)
// at the same speed that the board is transmitting (9600 bps).
p = new Serial(this, Serial.list()[2], 9600);
}


void draw()
{
background(102); // clear background to grey
if (p.available() > 0) { // if data is available to read
fill(p.read()); // read it and use as fill() color
}
rect(50, 50, 100, 100); // draw a square

if (mouseX != pmouseX) // if mouseX changed
{
int x = int(8*(mouseX/width)); // compute the relative x-position
p.write(x); // send it onto the serial line
delay(100);
}
}

.. All i need to do is send data to a specific serial port..the few errors im getting are


ard.java:9: class, interface, or enum expected
Serial p; // declare serial port object
^
ard.java:12: class, interface, or enum expected
void setup()
^
ard.java:15: class, interface, or enum expected
noStroke();


Thanks ...

[JosAH]

import processing.serial.*;         // load serial library
Serial p;                           // declare serial port object
...

This all has nothing to do with serial ports; Java uses the class notion as a compilation unit; everything has to be a member of a class (or interface). Your code violates this principle (see above). You have to define a class and methods and member variables in that class to make it legal Java. There are numerous tutorials that'll explain the details.

kind regards,

Jos