java (net beans)

 

package thonbadawi.aji;

import javax.swing.JOptionPane;

public class sakit extends javax.swing.JFrame {

String no,ruang;

int total,anak,dewasa,lama;

    /** Creates new form sakit */

    public sakit() {

        initComponents();

    }

    private void bkeluarActionPerformed(java.awt.event.ActionEvent evt) {                                       

        // TODO add your handling code here:

int a=JOptionPane.showConfirmDialog(null,"Ingin Keluar","informasi",JOptionPane.OK_CANCEL_OPTION);

if (a==JOptionPane.OK_OPTION)

    System.exit(0);

else

    return;

    }