import javax.swing.JFrame;
import javax.swing.JTextField;
import java.awt.FlowLayout;
class Haromszog
{
	public static Double szamitKerulet(double a, double b, double c)
	{
		return a + b + c;
	}
	public static Double szamitTerulet(double a, double m)
	{
		return (a * m) / 2.0;
	}
	public static Double szamitTerulet(double a, double b, double c)
	{
		double s = (a + b + c) / 2.0;
		return Math.sqrt(s*(s-a)*(s-b)*(s-c));
	}
}

class Program04 extends JFrame
{
	JTextField keruletMezo;
	JTextField terulet1Mezo;
	JTextField terulet2Mezo;
	Program04()
	{
		keruletMezo = new JTextField(10);
		terulet1Mezo = new JTextField(10);
		terulet2Mezo = new JTextField(10);

		keruletMezo.setText(Haromszog.szamitKerulet(30, 35, 40).toString());
		terulet1Mezo.setText(Haromszog.szamitTerulet(30, 35).toString());
		terulet2Mezo.setText(Haromszog.szamitTerulet(30, 35, 40).toString());

		add(keruletMezo);
		add(terulet1Mezo);
		add(terulet2Mezo);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setTitle("Háromszög terület, kerület számító program");
		setLayout(new FlowLayout());
		pack();
		setVisible(true);
	}
	public static void main(String[] args)
	{
		new Program04();
	}
}