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import java.awt.*; import java.awt.event.*; import javax.swing.*; class Ventana extends JFrame { JLabel etiqueta = new JLabel("Numeros:"); JTextField datoA = new JTextField(5); JTextField datoB = new JTextField(5); JLabel resultado = new JLabel("= "); ActionListener accion = new ActionListener() { public void actionPerformed(ActionEvent e) { resultado.setText("= " + ( Integer.parseInt(datoA.getText()) + Integer.parseInt(datoB.getText()))); } }; JButton sumar = new JButton("SUMAR"); public Ventana() { Container cont = getContentPane(); cont.setLayout(new FlowLayout()); cont.add(etiqueta); cont.add(datoA); cont.add(datoB); cont.add(resultado); sumar.addActionListener(accion); cont.add(sumar); // ACCION PARA CUANDO SE PIDE EL CIERRE DE LA VENTANA addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { dispose(); } }); } } class SumaSwing { public static void main(String args[]) { Ventana captura = new Ventana(); captura.setSize(250, 200); captura.show(); } }
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