Question

判断 jcombobox 是否选中 的方法

Answer 1

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JComboBox;
import javax.swing.JFrame;

public class Myjcombobox extends JFrame {
private JComboBox com;
private String[] str = new String[] { "Item1", "Item2" };

public Myjcombobox() {
init();
}

private void init() {
// TODO Auto-generated method stub
com = new JComboBox(str);
add(com);
com.addItemListener(new ItemListener() {

public void itemStateChanged(ItemEvent arg0) {
// TODO Auto-generated method stub
// 打印选择项
System.out.println(com.getSelectedItem());
}

});
}

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Myjcombobox mian = new Myjcombobox();
mian.setVisible(true);
mian.setSize(200, 50);
}

}