• Lenguaje

    Java usando AWT

  • Descripción

    Pide dos números y muestra su suma.

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import java.awt.*;
import java.awt.event.*;

public class SumaDeDosNumeros extends Frame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private TextField field_a, field_b;
    private Label label_suma;
    private Button button;

    public Algoritmo() {
        field_a = new TextField(4);
        field_b = new TextField(4);
        label_suma = new Label();
        button = new Button("Procesar");
        setLayout(new BorderLayout());
        Panel panel, subpanel;
        panel = new Panel(new BorderLayout());
        subpanel = new Panel(new GridLayout(2, 1));
        subpanel.add(new Label("Ingresa el valor de a:"));
        subpanel.add(new Label("Ingresa el valor de b:"));
        panel.add(subpanel, BorderLayout.WEST);
        subpanel = new Panel(new GridLayout(2, 1));
        subpanel.add(field_a);
        subpanel.add(field_b);
        panel.add(subpanel);
        add(panel, BorderLayout.NORTH);
        panel = new Panel(new FlowLayout());
        panel.add(button);
        add(panel);
        panel = new Panel(new BorderLayout());
        subpanel = new Panel(new GridLayout(1, 1));
        subpanel.add(new Label("Valor de suma:"));
        panel.add(subpanel, BorderLayout.WEST);
        subpanel = new Panel(new GridLayout(1, 1));
        subpanel.add(label_suma);
        panel.add(subpanel);
        add(panel, BorderLayout.SOUTH);
        button.addActionListener(this);
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        double a, b, suma;
        try {
            a = Double.parseDouble(field_a.getText());
            b = Double.parseDouble(field_b.getText());
        } catch (NumberFormatException numberFormatException) {
            return;
        }
        suma=a+b;
        label_suma.setText(String.valueOf(suma));
        pack();
    }

    public static void main(String[] args) {
        Algoritmo algoritmo = new Algoritmo();
        algoritmo.pack();
        algoritmo.setLocationRelativeTo(null);
        algoritmo.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        algoritmo.setVisible(true);
    }

}