uni

Circle.java (1704B)

---

 import java.awt.*;
 import java.awt.geom.*;
 import java.util.Random;
 
 public class Circle {
 	private int diamiter;
 	private int x, y;
 	private int dx, dy;
 	private String color;
 	private boolean isVisible;
 
 	public Circle() {
 		Random rand = new Random();
 		diamiter = 30;
 		x = rand.nextInt(500);
 		y = rand.nextInt(500);
 		dx = 3;
 		dy = 3;
 		color = "blue";
 		isVisible = true;
 	}
 
 	public int getDiamiter() {
 		return diamiter;
 	}
 
 	public int getX() {
 		return x;
 	}
 
 	public int getY() {
 		return y;
 	}
 
 	public int getDx() {
 		return dx;
 	}
 
 	public int getDy() {
 		return dy;
 	}
 
 	public String getColor() {
 		return color;
 	}
 	
 	public boolean getisVisible() {
 		return isVisible;
 	}
 
 	public String toString() {
 		return "diamiter: " + diamiter +
 			", x: " + x +
 			", y: " + y +
 			", color: " + color +
 			", visible: " + isVisible;
 	}
 
 	public void draw() {
 		if (isVisible) {
 			Canvas canv = Canvas.getCanvas();
 			canv.draw(this, color, new Ellipse2D.Double(x, y, diamiter, diamiter));
 			canv.wait(10);
 		}
 	}
 
 	private void erase() {
 		if (isVisible) {
 			Canvas canv = Canvas.getCanvas();
 			canv.erase(this);
 		}
 	}
 
 	public void move() {
 		erase();
 		x += dx;
 		y += dy;
 		draw();
 	}
 
 	public void makeVisible() {
 		isVisible = true;
 		draw();
 	}
 
 	public void makeInvisible() {
 		erase();
 		isVisible = false;
 	}
 
 	public void changeColor(String newColor) {
 		color = newColor;
 		draw();
 	}
 
 	public void changeSize(int newDiamiter) {
 		erase();
 		diamiter = newDiamiter;
 		draw();
 	}
 	
 	public void setDx(int newDx) {
 		dx = newDx;
 	}
 
 	public void setDy(int newDy) {
 		dy = newDy;
 	}
 
 	public void setX(int newx) {
 		x = newx;
 	}
 
 	public void setY(int newy) {
 		y = newy;
 	}
 
 };