java中两个图像之间的碰撞检测

Question

I need to know when the rocket hit the meteor, img2 is the meteor and img is the rocket

g.drawImage(img, posX - img.getWidth(this)/2, posY - img.getHeight(this), this);
        g.drawImage(img2,posX1 - img2.getWidth(this), posY1 - img2.getHeight(this),this);
        System.out.println(posY-img.getWidth(this));
        System.out.println(posY1);
      }
      public void colid (){
        if (posY1+img.getWidth(this)>= posY-img2.getWidth(this) ){

            System.out.println("teste");
        }

Answer 1

You can create a Rectangle for every object like for a rocket or meteor

and there is a Rectangle method you can use

boolean intersects(Rectangle r)
Determines whether or not this Rectangle and the specified Rectangle intersect.

so you could check

if (rectangleA.intersects(rectangleB){
 System.out.println("Colliosion!!")
}

Answer 2

This should do it

        Rectangle r1 = new Rectangle(posX - img.getWidth(this)/2, posY - img.getHeight(this), img.getWidth(this), img.getHeight(this));
        Rectangle r2 = new Rectangle(posX1 - img2.getWidth(this), posY1 - img2.getHeight(this), img2.getWidth(this), img2.getHeight(this));

        boolean collision = r1.intersects(r2);

Note: You are dividing the width with 2 in the first image and not the second. Maybe it is as it should be but just want to let you know if it is not.