//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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