Hey i am trying to hook up processing with an arduino ping sensor so i can control a  the movement of ball within processing. I have the code from a tutorial site modified slightly and have no compiling errors.Both parts work fine on thier own but they will communicate with each other.
http://webzone.k3.mah.se/projects/arduino-workshop/projects/arduino_meets_processing/instructions/ultrasound.html

Arduino code

int ultraSoundSignal = 7; // Ultrasound signal pin
int val = 0;
int ultrasoundValue = 0;
int timecount = 0; // Echo counter
int ledPin = 13; // LED connected to digital pin 13
int prntInteger;

void setup() {
 beginSerial(9600);                  // Sets the baud rate to 9600
 pinMode(ledPin, OUTPUT);            // Sets the digital pin as output
}

void loop() {
timecount = 0;
val = 0;
pinMode(ultraSoundSignal, OUTPUT); // Switch signalpin to output

/* Send low-high-low pulse to activate the trigger pulse of the sensor
* -------------------------------------------------------------------
*/

digitalWrite(ultraSoundSignal, LOW); // Send low pulse
delayMicroseconds(2); // Wait for 2 microseconds
digitalWrite(ultraSoundSignal, HIGH); // Send high pulse
delayMicroseconds(5); // Wait for 5 microseconds
digitalWrite(ultraSoundSignal, LOW); // Holdoff

/* Listening for echo pulse
* -------------------------------------------------------------------
*/

pinMode(ultraSoundSignal, INPUT); // Switch signalpin to input
val = digitalRead(ultraSoundSignal); // Append signal value to val
while(val == LOW) { // Loop until pin reads a high value
 val = digitalRead(ultraSoundSignal);
}

while(val == HIGH) { // Loop until pin reads a high value
 val = digitalRead(ultraSoundSignal);
 timecount = timecount +1;            // Count echo pulse time
}

/* Writing out values to the serial port
* -------------------------------------------------------------------
*/

ultrasoundValue = timecount; // Append echo pulse time to ultrasoundValue

serialWrite('A'); // Example identifier for the sensor
Serial.print(ultrasoundValue);
serialWrite(10);
serialWrite(13);

/* Lite up LED if any value is passed by the echo pulse
* -------------------------------------------------------------------
*/

if(timecount > 0){
 digitalWrite(ledPin, HIGH);
}

/* Delay of program
* -------------------------------------------------------------------
*/

delay(100);
}


Processing code

import processing.serial.*;

 DisplayItems di;  // backgroundcolor, grid, etc. are controlled in the DisplayItems object
 // width and height should be set here
 int xWidth = 600;
 int yHeight = 600;

 // set framerate
 int fr = 24;
 
 // set up the display items you want by choosing true
 boolean bck = true;
 boolean grid = true;
 boolean g_vert = true;
 boolean g_horiz = true;
 boolean g_values = true;
 boolean output = true;
 
 // these variables are for the serial port connection object
 Serial port;
 String portname = "COM5";  // find the name of your serial port in your system setup!
 int baudrate = 9600;  //  set baudrate here
 int value;  // variables used to store value from serial port
 String buf=""; // String buffer to store serial values
 int value1;  // value1 is the read value


// pressing these keys you can toogle on/off display items
void keyPressed(){
     if (key == 'b' || key == 'B') bck=!bck;
     if (key == 'g' || key == 'G') grid=!grid;
     if (key == 'v' || key == 'V') g_values=!g_values;
     if (key == 'o' || key == 'O') output=!output;
}

// the serial event function takes the value of the event and store it in the corresponding variable
void serialEvent(int serial){

   if(serial!=10) {        
         buf += char(serial);          
         } else {
         //extract the value from the string 'buf'
         buf = buf.substring(1,buf.length());
         //cast the value to an integer
         value1 = int(buf);
         buf="";
     }
    }
// setup initializes displayItems and serial port objects
void setup(){
 
     size(xWidth, yHeight);
     frameRate(fr);

     di = new DisplayItems();

     port = new Serial(this, portname, baudrate);
     println(port);
}
void createCircle(){

 
  //Adding constraints to keep the circle within the framesize
  if(value1 > width){
      value1 = width;
  }
    //Draw the circle
    ellipse(width/2, height/2, value1, value1);

     
}

// draw listens to serial port, draw
void draw(){
 
 while(port.available() > 0){
       value = port.read();
       serialEvent(value);
   }

   di.drawBack();

   noStroke();
   fill(0, 0, 255);
   
   createCircle();
   
   di.drawItems();  
   
   
   if(output) println("Distance: "+value1);
   delay(100);
}

Left out the display class but you can find all the code up on that site. Any help would be much appriciated