Java组合框

package swimg;

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class ComboBox {
public JPanel create(){
JPanel panel=new JPanel();
String items[]={"请从下拉列表中选择","星期一","星期二","星期三","星期四","星期五","星期六","星期日"};
JComboBox cb=new JComboBox(items);
cb.setEditable(true);
panel.add(new JLabel("可编辑组合框："));
panel.add(cb);

panel.setVisible(true);
return panel;
}
public static void main(String[] args) {
JFrame frame=new JFrame("组合框");
frame.setBounds(200,200,400,400);
frame.setResizable(true);
frame.setLayout(new BorderLayout());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.getContentPane().add(new ComboBox().create());
//frame.pack();
}

}