public class pixel { class Pixel extends point { public Pixel() { super(); } public Pixel(int x, int y, String tenMau, String maMau) { super(x, y, tenMau, maMau); } public boolean kiemtra() { return ktCheoChinh()&&gettenMau().equals("Xanh"); } } }

public class pixel {
    class Pixel extends point {
    public Pixel() {
        super();
    }
    public Pixel(int x, int y, String tenMau, String maMau) {
        super(x, y, tenMau, maMau);
    }
    public boolean kiemtra() {
        return ktCheoChinh()&&gettenMau().equals("Xanh");
    }
  }
}