1-) Java - YUKARDAKİNİN AYNISI LABELDE DİNAMİK //DİNAMİK COMBOBOX OLUŞTUR VE FRAMEDEKİ LABELİ ONUNLA YÖNET

public class label {

public static JFrame pen;

public label() {

pen = new JFrame();

pen.setLayout(new FlowLayout());

JComboBox combo = new JComboBox();

for (int i = 1; i <= 10; i++) {

combo.addItem(i); }

pen.add(combo);

JLabel label = new JLabel();

label.setText("Label");

pen.add(label);

combo.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

label.setText(combo.getSelectedItem().toString()); } });

pen.setBounds(0, 0, 640, 480);

pen.validate();

pen.setVisible(true);

}

public static void main(String[] args) {

new label(); }}