Pong - problems with boundary check

Processing Coding Questions
2 
class Ball {
  float xPos;
  float yPos;
  
  float xSpeed = 2.8;
  float ySpeed = 2.2;
  
  int xDirection = 1;
  int yDirection = 1;
  
  int rad = 16;
  
  final float speed = 5;
  
  Paddle paddle;
  
  public Ball(Paddle paddle){
    paddle = paddle;
    
    // set starting position of the ball, start in center of screen
    xPos = width / 2;
    yPos = height / 2;
  }
  
  
  public void move() {
    // update the ball's position
    //xPos += (xSpeed) + (xSpeed * xDirection);
    yPos += (ySpeed) + (ySpeed * yDirection);
 
  }
  
  public void draw() {
    ellipse(xPos, yPos, rad, rad);
    checkBoundaries();
  }
  
  public void checkBoundaries() {
    if(xPos > width - rad ) {
      xSpeed -= 2.2;
    }
    if(xPos <rad ) {
      xSpeed = 2.2;
    }
    
    if(yPos > height) {
     ySpeed = -2.2*yDirection;
     println("yDirection: " + yDirection + "yPos: " + yPos);
    }
    if(yPos<rad) {
     ySpeed = 2.2*yDirection;
     println("yDirection: " + yDirection + "yPos: " + yPos);
    }
  }
  
  public void checkCollision() {
    
  }
}