本文实例讲述了java之swing下拉菜单实现方法。分享给大家供大家参考。具体如下：

import java.awt.*; import javax.swing.*; import java.awt.event.*; public class test extends JApplet implements ItemListener{ JLabel jtf; ImageIcon a1, a2, a3; public void init(){ Container contentPane = getContentPane(); contentPane.setLayout(new FlowLayout()); JComboBox jc = new JComboBox(); jc.addItem("6"); jc.addItem("7"); jc.addItem("8"); jc.addItemListener(this); contentPane.add(jc); jtf = new JLabel(new ImageIcon("D:/data/Images/6.gif")); contentPane.add(jtf); } public void itemStateChanged(ItemEvent ie){ String s = (String)ie.getItem(); jtf.setIcon(new ImageIcon("D:/data/Images/"+s+".gif")); } }

希望本文所述对大家的java程序设计有所帮助。