import java.awt.*;
public abstract class Sprite {
  protected boolean visible;		// is sprite visible
  protected boolean active;		// is sprite updateable

  // abstract methods:
  abstract void paint (Graphics g);
  abstract void update();

  // accessor methods:
  public boolean isVisible() {
    return visible;
  }

  public void setVisible(boolean b) {
    visible = b;
  }

  public boolean isActive() {
    return active;
  }

  public void setActive(boolean b) {
    active = b;
  }

  // suspend the sprite
  public void suspend() {
    setVisible(false);
    setActive(false);
  }

  // restor the sprite
  public void restore() {
    setVisible(true);
    setActive(true);
  }

}