How can I implement objects with colliders?

Processing Coding Questions
1

I have to do a program where the player moves an object with the keyboard and there are obstacles that collide with the player. I have the movement part and it works really well but I really dont know how to print objects with hitbox that interact with the player.

There is the movement code, its really simple but works.

float x = 100; 
float y = 100; 

float xSpeed = 0;
float ySpeed = 0;

boolean keyLeft, keyRight, keyUp, keyDown;

void setup() {
  size(1500, 1000);
}

void draw() {
  background(255);
  

 ellipse(x, y, 50, 50);
  fill(255,0,100);
  
  
  pSpeed();   
  changePos(); 
  
  xSpeed *= 0.9; 
  ySpeed *= 0.9;
  
}
void pSpeed(){
  if(keyLeft) xSpeed-= 0.5;
  if(keyRight) xSpeed+= 0.5;
  if(keyUp) ySpeed-= 0.5;
  if(keyDown) ySpeed+= 0.5;
}

void changePos(){
  x+=xSpeed;
  y+=ySpeed;
}



void keyPressed() {
//  if (key == CODED) {
    if (keyCode == UP) {
      keyUp = true;
    }
    if (keyCode == DOWN) {
      keyDown = true;
    }
    if (keyCode == LEFT) {
      keyLeft = true;
    }
    if (keyCode == RIGHT) {
      keyRight = true;
    }
  }

void keyReleased() {
{
    if (keyCode == UP) {
      keyUp = false;
    }
    if (keyCode == DOWN) {
      keyDown = false;
    }
    if (keyCode == LEFT) {
      keyLeft = false;
    }
    if (keyCode == RIGHT) {
      keyRight = false;
    }
  }
}
2

I have edited your post and formatted the code with the </> button – please do this in the future.

For overviews of collision detection in Processing, see: