JRadioButton

gistfile1.java

import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

public class JRadioButtonExample extends JFrame {
    private JRadioButton botao1RadioButton;
    private JRadioButton botao2RadioButton;
    private JPanel rootContainer;
    private JTextField exampleTextField;

    public JRadioButtonExample() {
        super("JRadioButtonExample");
        setContentPane(rootContainer);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        exampleTextField.getDocument().addDocumentListener(new DocumentListener() {
            @Override
            public void insertUpdate(DocumentEvent documentEvent) {
                System.out.println("Inseriu texto");
            }

            @Override
            public void removeUpdate(DocumentEvent documentEvent) {
                System.out.println("Removeu texto");
            }

            @Override
            public void changedUpdate(DocumentEvent documentEvent) {
                System.out.println("Modificou o texto");
            }
        });


        ItemListener itemListener = new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent itemEvent) {
                if (itemEvent.getStateChange() == ItemEvent.SELECTED) {
                    if (botao1RadioButton.isSelected()) {
                        System.out.println("botao1RadioButton foi selecionado");
                    }

                    if (botao2RadioButton.isSelected()) {
                        System.out.println("botao2RadioButton foi selecionado");
                    }
                }
            }
        };

        botao1RadioButton.addItemListener(itemListener);
        botao2RadioButton.addItemListener(itemListener);

        pack();
    }

    public void showMe() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                setVisible(true);
            }
        });
    }

    public static void main(String[] args) {
        (new JRadioButtonExample()).showMe();
    }
}

gistfile2.txt

private double celsiusToFahrenheit(long temperature) {
   return (temperature * 9/5) + 32;
}

private double fahrenheitToCelsius(long temperature) {
   return (temperature - 32) * 5/9;
}

gistfile3.txt

Integer.parseInt(text);