📁 Java Tutorial 059 - Code Viewer

import java.awt.event.*; import javax.swing.*; public class BaglantiliCombo { public BaglantiliCombo() { JFrame frame = new JFrame("Baglantili JComboBox Ornegi Java Blackboard 059"); frame.setLayout(null); String[] diziSehir = { "Şehir Seçiniz", "İstanbul", "Ankara", "Antalya", "Muğla"}; JLabel labelBaslik = new JLabel("Bağlantılı ComboBox ÖRNEK"); labelBaslik.setBounds(100, 50, 200, 30); JLabel labelSehir = new JLabel("Şehir : "); labelSehir.setBounds(100, 100, 50, 30); JComboBox comboSehir = new JComboBox(diziSehir); comboSehir.setBounds(150, 100, 150,30); JLabel labelIlce = new JLabel("İlçe : "); labelIlce.setBounds(100, 150, 50, 30); JComboBox comboIlce = new JComboBox(); comboIlce.setBounds(150, 150, 150,30); JButton butonGoster = new JButton("Göster"); butonGoster.setBounds(100, 200, 200, 30); JTextArea areaSecilenler = new JTextArea(); areaSecilenler.setBounds(100, 250, 200, 200); JScrollPane areaPane = new JScrollPane(areaSecilenler); areaPane.setBounds(100, 250, 200, 200); comboSehir.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (comboSehir.getSelectedItem().equals("İstanbul")) { comboIlce.removeAllItems(); comboIlce.setSelectedItem(0); comboIlce.addItem("İlçe seçiniz."); // 0 comboIlce.addItem("Kadıköy"); // 1 comboIlce.addItem("Üsküdar"); comboIlce.addItem("Eminönü"); comboIlce.addItem("Beşiktaş"); } else if ( comboSehir.getSelectedItem().equals("Ankara")) { comboIlce.removeAllItems(); comboIlce.setSelectedItem(0); comboIlce.addItem("İlçe seçiniz."); comboIlce.addItem("Gölbaşi"); comboIlce.addItem("Altındağ"); comboIlce.addItem("Beypazarı"); comboIlce.addItem("Keçiören"); } else if ( comboSehir.getSelectedItem().equals("Antalya")) { comboIlce.removeAllItems(); comboIlce.setSelectedItem(0); comboIlce.addItem("İlçe seçiniz."); comboIlce.addItem("Kemer"); comboIlce.addItem("Manavgat"); comboIlce.addItem("Muratpaşa"); comboIlce.addItem("Konyaaltı"); } else if ( comboSehir.getSelectedItem().equals("Muğla")) { comboIlce.removeAllItems(); comboIlce.setSelectedItem(0); comboIlce.addItem("İlçe seçiniz."); comboIlce.addItem("Bodrum"); comboIlce.addItem("Datça"); comboIlce.addItem("Dalaman"); comboIlce.addItem("Fethiye"); comboIlce.addItem("Milas"); } } }); butonGoster.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String sehirAdi = (String) comboSehir.getSelectedItem(); comboSehir.setSelectedIndex(0); String ilceAdi = (String) comboIlce.getSelectedItem(); comboIlce.setSelectedIndex(0); // String squareSymbol = new String(Character.toChars(0x25A0)); // ■ -> https://unicode-table.com/en/25A0/ String squareSymbol = "\u25A0"; // ■ -> https://unicode-table.com/en/25A0/ areaSecilenler.append(squareSymbol+squareSymbol+squareSymbol+"\nSeçilen şehir ve ilçe bilgisi:\nŞehir : "+ sehirAdi + "\nİlçe : " + ilceAdi + "\n"); } }); frame.add(labelBaslik); frame.add(labelSehir); frame.add(comboSehir); frame.add(labelIlce); frame.add(comboIlce); frame.add(butonGoster); frame.add(areaPane); frame.setSize(400, 500); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }