just update, i have written in some extra lines which i have seen working on another example,
however it only bounces the ball back intermitently and only bounces back off the right paddle.
any ideas?
//sets up ball start and speed
float x = 250;
float y = 200;
float xspeed = 1;
float yspeed = 1;
int rightpaddle = 200;
int leftpaddle = 200;
boolean[] keys = new boolean[4]; //boolean array to allow multiple key presses
final int W = 0;
final int S = 1;
final int U = 2;
final int D = 3;

void setup() {
  size(500,400);
    smooth();
    for (int i = 0; i< 4; i++) {
   keys[i] = false;
 }
 //sets up play area size, anti aliasing and second part of boolean array
}

void draw(){
  background(155);
   stroke(255);
  line(250,0,250,400);
  fill(155);
  stroke(255);
  ellipse(250,200,80,80);
  move();
  ball();
  bounce();
  paddle(15,leftpaddle,70); //player 1
  paddle(485,rightpaddle,70); //player 2
 
  if (keys[W] == true){
      leftpaddle = max(35, leftpaddle - 4); // player 1 paddle up
    }
  
  if(keys[S] == true){
      leftpaddle = min (365, leftpaddle + 4); // player 1 paddle down
    }
   
  if(keys[U] == true){
      rightpaddle = max(35, rightpaddle - 4); //player 2 paddle up
    }
 
  if(keys[D] == true){
      rightpaddle = min(365, rightpaddle +4); //player 2 paddle down
    }
 
 
//sets up the background of play area classes, key presses for movment and constrains paddles to screen.
}
void keyPressed() {
 if(key == 'w') {
   keys[W] = true;
 } else if(key == 's') {
   keys[S] = true;
 } else if(keyCode == UP) {
   keys[U] = true;
 } else if (keyCode == DOWN) {
   keys[D] = true;
 }
}//creates key presses, when key is pressed action happens

void keyReleased() {
 if(key == 'w') {
   keys[W] = false;
 } else if(key == 's') {
   keys[S] = false;
 } else if(keyCode == UP) {
   keys[U] = false;
 } else if (keyCode == DOWN) {
   keys[D] = false;
 } // creates key releases, when key is released action stops
}

void move(){
  x = x + xspeed;
  y = y + yspeed;
  //movement class
}

void ball(){
  stroke(0);
  fill(0);
  ellipse(x,y,30,30);
  //ball class
}
 
void bounce(){
 
 if(x == 468 && y >= rightpaddle-50 && y <= rightpaddle+50) {    //Movements if ball touch right player.
 if(y < rightpaddle) {
   xspeed = xspeed *-1.1;
 }
 if(x == 32 && y >= leftpaddle-40 && y <= leftpaddle+40) {
   xspeed = xspeed * 1.1;
 }
 }
    if ((y>385) || (y < 15 )){
    yspeed = yspeed *-1;
  }
  //sets up bounce off of edges and needs editing for paddles
     
}

void paddle(int x, int y, int Size) {
  rectMode(CENTER);
  stroke(0);
  fill(0);
  rect(x,y,Size/4,Size);
  //Paddle Class
}

Thanks

Hmm...