• Lenguaje

    Java usando Swing

  • Descripción

    Calcular la potencia de un número.

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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PotenciaDeUnNumero extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private JTextField field_base, field_exponente;
    private JLabel label_potencia;
    private JButton button;

    public Algoritmo() {
        field_base = new JTextField(4);
        field_exponente = new JTextField(4);
        label_potencia = new JLabel("", JLabel.RIGHT);
        button = new JButton("Procesar");
        Container pane = getContentPane();
        pane.setLayout(new BorderLayout());
        JPanel panel, subpanel;
        panel = new JPanel(new BorderLayout());
        subpanel = new JPanel(new GridLayout(2, 1));
        subpanel.add(new JLabel("Ingresa el valor de base:"));
        subpanel.add(new JLabel("Ingresa el valor de exponente:"));
        panel.add(subpanel, BorderLayout.WEST);
        subpanel = new JPanel(new GridLayout(2, 1));
        subpanel.add(field_base);
        subpanel.add(field_exponente);
        panel.add(subpanel);
        pane.add(panel, BorderLayout.NORTH);
        panel = new JPanel(new FlowLayout());
        panel.add(button);
        pane.add(panel);
        panel = new JPanel(new BorderLayout());
        subpanel = new JPanel(new GridLayout(1, 1));
        subpanel.add(new JLabel("Valor de potencia:"));
        panel.add(subpanel, BorderLayout.WEST);
        subpanel = new JPanel(new GridLayout(1, 1));
        subpanel.add(label_potencia);
        panel.add(subpanel);
        pane.add(panel, BorderLayout.SOUTH);
        button.addActionListener(this);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setLocationRelativeTo(null);
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        double base, exponente, potencia;
        try {
            base = Double.parseDouble(field_base.getText());
            exponente = Double.parseDouble(field_exponente.getText());
        } catch (NumberFormatException numberFormatException) {
            return;
        }
        potencia=Math.pow(base,exponente);
        label_potencia.setText(String.valueOf(potencia));
        pack();
    }

    public static void main(String[] args) {
        new Algoritmo().setVisible(true);
    }

}