prozor1

import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

public class Prozor1 extends JFrame {
    private JPanel m; //contentPane
    private JLabel lblTemp, lblRez;
    private JTextField txtTemp, txtRez;
    private JButton btnConvert;
    private JRadioButton btnrdCF,btnrdFC;

    public class Klik implements ActionListener
    {

        @Override
        public void actionPerformed(ActionEvent arg0) {
            // TODO Auto-generated method stub

            String t = txtTemp.getText();
            double temp = Double.parseDouble(t);
            if(btnrdCF.isSelected())
            {
                temp=(9.0/5.0)*temp + 32.0;
            }

            temp= (5.0/9.0)*(temp - 32.0);
            t = Double.toString(temp);
            txtRez.setText(t);

        }

    }

    public static void main(String [] args){

        Prozor1 frame = new Prozor1();
        frame.setVisible(true);

    }

    public Prozor1 () //konstruktor
    {
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setBounds(100, 100, 350, 450);
        //setLayout(new FlowLayout());
        m = new JPanel();
        m.setBorder(new EmptyBorder(5,5,5,5));
        //m.setLayout(new FlowLayout());
        m.setLayout(new GridLayout(4,2,10,10));
        lblTemp = new JLabel("Temperatura:");
        lblRez = new JLabel("Rezultat:");
        txtTemp = new JTextField(5);
        txtRez = new JTextField(5);
        btnConvert = new JButton("Konverzija");

        m.add(lblTemp);
        m.add(txtTemp);
        m.add(lblRez);
        m.add(txtRez);
        btnrdCF = new JRadioButton("C->F");
        btnrdFC = new JRadioButton("F->C");
        ButtonGroup b = new ButtonGroup();
        b.add(btnrdCF);
        b.add(btnrdFC);
        btnrdCF.setSelected(true);
        m.add(btnrdCF);
        m.add(btnrdFC);
        btnConvert.addActionListener(new Klik());
        m.add(btnConvert);


        setContentPane(m);
    }

    /* @Override
    public void actionPerformed(ActionEvent arg0) {
        // TODO Auto-generated method stub
        String t = txtTemp.getText();
        double temp = Double.parseDouble(t);
        temp= (9.0/5.0)*temp + 32.0;
        t = Double.toString(temp);
        txtRez.setText(t);
    }
    */



}