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：
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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"));
}
}
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希望本文所述对大家的java程序设计有所帮助。