Java Swing - 如何創(chuàng)建區(qū)分大小寫的JComboBox
我們想知道如何創(chuàng)建區(qū)分大小寫的JComboBox。
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Main {
public static void main(String[] args) {
String items[] = { "Item1", "item1" };
JFrame f = new JFrame();
JPanel panel = new JPanel();
JComboBox<String> combo = new JComboBox<>(items);
combo.setEditable(true);
JTextField txt = new JTextField(10);
panel.add(combo);
panel.add(txt);
f.add(panel);
combo.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent ie) {
String str = (String) combo.getSelectedItem();
txt.setText(str);
}
});
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(400, 100);
f.setVisible(true);
}
}
【jcombobox】
