//组合框的选项是对象,不一定是字符串,比如可以显示图象,但最好不要将字符串和图象混合了放在一个组合框里

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JComboBox;
import javax.swing.UIManager;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.ImageIcon;

public class JComboBoxDemo
{
 public static void main(String[] args)
 {
  try {UIManager.setLookAndFeel (UIManager.getSystemLookAndFeelClassName ());}catch(Exception e){}
  String[] names = {"孙中山", "袁世凯", "毛泽东", "蒋介石", "邓小平", "天安

门"};
  MyBox equals = new MyBox (names);
  equals.addItem ("游神");
  equals.addItem ("猪头");
  
  MyBox images = new MyBox ();
  images.addItem (new ImageIcon ("Image//QQ.png"));
  images.addItem (new ImageIcon ("Image//fairy.gif"));
  
  JPanel panel = new JPanel(new FlowLayout (FlowLayout.CENTER, 0, 1));
  panel.setPreferredSize (new Dimension (300,100));
  panel.add (equals);
  panel.add (images);
  
  JFrame frame = new JFrame("人名");
  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  
  frame.setContentPane (panel);
  frame.pack();
  frame.show();
 }
}

class MyBox extends JComboBox
{
 public MyBox(){}
 public MyBox(Object[] boj)
 {
  super(boj);
  setEditable (true);
  setAlignmentX (Component.LEFT_ALIGNMENT);
 }
}
 

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