Question

Complete the following coding in java

Create a class Circle that represents a round moving dot. A circle object needs to contain double variables to store the: Current X location of the circle's center Current Y location of the circle's center Radius of the circle Direction of the circle's movement in radians Speed of the circle's movement . . The Circle class must contain a constructor Circle double x, double y, double radius) that initializes the circles center x, y and radius. The Circle class must provide the following methods public double getY ) public void sety( double vert) public double getX () public void setx( double horz public double getSpeed ) public void setSpeed ( double fast ) /(#Set the speed of the circle*/ public double getDir ) public void setDir double compass Set the direction of the circle in radians/ public double getRadius) public void move( double time) Update the x coordinate to x +cos( direction)speedtime Update the y coordinate to y +sin( direction)speed time Returns the y coordinate of the center of circle. set the y coordinate Returns the x coordinate of the center of circle./ set the x coordinate/ Returns the speed ofthe circle Returnms the direction of movement Returms the radius of this circle./ Updates the x and y coordinates after the time / public boolean touches(Circle otherTrue if the other circle touches this circle/ True if the distance between the centers of the two circles, (-y2) is less than the sum of the two circles radii. Your Circle class must contain the following main method: public static void main (String[ unused) Box.animate () You will need to download the BounceFX.jar file and te jGRASP in Settings/ Classpath/ workspace/ Classpaths. Upload your completed Circle java file to Blackboard.

Answer 1

public class Circle {
    double x, y, r;
    double dir, speed;

    public Circle(double x, double y, double radius) {
        this.x = x;
        this.y = y;
        this.r = radius;
    }

    public double getX() {
        return x;
    }

    public void setX(double x) {
        this.x = x;
    }

    public double getY() {
        return y;
    }

    public void setY(double y) {
        this.y = y;
    }

    public double getRadius() {
        return r;
    }

    public double getDir() {
        return dir;
    }

    public void setDir(double compass) {
        this.dir = compass;
    }

    public double getSpeed() {
        return speed;
    }

    public void setSpeed(double speed) {
        this.speed = speed;
    }

    public void move(double time) {
        x = x + Math.cos(dir) * speed * time;
        y = y + Math.sin(dir) * speed * time;
    }

    public boolean touches(Circle other) {
        double d = Math.sqrt(Math.pow(x - other.x, 2) + Math.pow(y - other.y, 2));
        return (d < (other.r + r));
    }

}