//PROGRAM 13-9
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class DemoComboBox implements ActionListener {
public JLabel labelNama, labelLahir,
labelTanggal, labelBulan, labelTahun;
public JTextField tfNama, tfInfo;
public JComboBox comboTanggal, comboBulan, comboTahun;
public JButton btnProses;
public DemoComboBox() {
String s1 = "Nama:";
labelNama = new JLabel(s1);
labelNama.setLocation(10, 10);
labelNama.setSize(labelNama.getPreferredSize());
tfNama = new JTextField(25);
tfNama.setLocation(10, 30);
tfNama.setSize(tfNama.getPreferredSize());
String s2 =
"Tanggal Lahir:";
labelLahir = new JLabel(s2);
labelLahir.setLocation(10, 55);
labelLahir.setSize(labelLahir.getPreferredSize());
labelTanggal = new JLabel("Hari ke-");
labelTanggal.setLocation(35, 75);
labelTanggal.setSize(labelTanggal.getPreferredSize());
comboTanggal = new JComboBox();
comboTanggal.setLocation(35, 93);
comboTanggal.setSize(labelTanggal.getPreferredSize());
for (int i=0; i<31; i++) {
comboTanggal.addItem(new String().valueOf(i+1));
}
labelBulan = new JLabel("Bulan");
labelBulan.setLocation(95, 75);
labelBulan.setSize(labelBulan.getPreferredSize());
comboBulan = new JComboBox();
comboBulan.setLocation(95, 93);
comboBulan.setSize(labelLahir.getPreferredSize());
String[] bulan = {"Januari","Februari","Maret","April",
"Mei","Juni","Juli","Agustus",
"September","Oktober","November","Desember"};
for (int i=0; i