public class ColorPoint extends Point {
  public String[] cs = {
    "black", "red", "green", "yellow",
    "blue", "magenta", "cyan", "white"};
  public String color;

  @Override
  public void print() {
    System.out.printf("<font color='%s'>",
                      getColor());
    // 次の行は super.print(); でも可
    System.out.printf("(%d, %d)", x, y); 
    System.out.print("</font>");
  }

  public void setColor(String c) {
    int i;
    for (i = 0; i < cs.length; i++) {
      if (c.equals(cs[i])) {
        color = c; return;
      }
    }
    // 対応する色がなかったら何もしない。
  }

  public ColorPoint(int x, int y, String c) {
    super(x, y);
    setColor(c);
    if (color == null) color = "black";
  }

  public String getColor() {
    return color;
  }
}