📁 Java Tutorial 046 - Code Viewer

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class JB_046_NullLayoutJComboBox extends JFrame implements ActionListener { String[] liste = {"Bir", "Iki", "Uç"}; JComboBox comboListe = new JComboBox(liste); JLabel label = new JLabel("Bos label"); public static void main (String[] args) { new JB_046_NullLayoutJComboBox(); } public JB_046_NullLayoutJComboBox() { comboListe.setSelectedIndex(1); comboListe.addActionListener(this); comboListe.setBounds(100, 100, 80, 30); label.setBounds(200, 100, 80, 30); add(comboListe); add(label); setLayout(null); setSize(400, 400); setTitle("Combo List Ornek 046"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLocationRelativeTo(null); // Ekranin ortasina hizalasin istiyoruz. setVisible(true); } public void actionPerformed(ActionEvent e) { if(e.getSource() == comboListe) { JComboBox cb = (JComboBox) e.getSource(); String msg = (String) cb.getSelectedItem(); switch (msg) { case "Bir": label.setText("1 seçildi."); break; case "Iki": label.setText("2 seçildi."); break; case "Uç": label.setText("3 seçildi."); break; default : label.setText("Seçilen yok."); break; } } } }