test.htm<html>
<head><title>Java Applet Example</title></head>
<body>
<center>
<applet archive="test.jar" code="Hello.class" height=200 width=300></applet>
</center>
</body>
</html>其中test.jar包含fox.gif和那个辅助类WindowEventHandler
<head><title>Java Applet Example</title></head>
<body>
<center>
<applet archive="test.jar" code="Hello.class" height=200 width=300></applet>
</center>
</body>
</html>其中test.jar包含fox.gif和那个辅助类WindowEventHandler
又是JApplet又是JFrame
如果你直接把JLabel加入到JFrame还出现类似问题,再提问吧.....
你太教条了
applet和application的确可以混合编写但是这是不可取的
getContentPane().add(new JLabel("Hello!Swing World",new ImageIcon("fox.gif"),JLabel.CENTER));提示错误:java.security.AccessControlException: access denied (java.io.FilePermission fox.gif read) at java.security.AccessControlContext.checkPermission(Unknown Source) at java.security.AccessController.checkPermission(Unknown Source) at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at sun.awt.SunToolkit.getImageFromHash(Unknown Source)
at sun.awt.SunToolkit.getImage(Unknown Source)
at javax.swing.ImageIcon.<init>(Unknown Source)
at javax.swing.ImageIcon.<init>(Unknown Source)
at Hello.init(Hello.java:10)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)用这个:getContentPane().add(new JLabel("Hello!Swing World",null,JLabel.CENTER));
正常显示。
建议学习一下给applet签名以及怎样用ClassLoader里用通过URL获取资源的方法
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;
import javax.swing.*;public class JListDemo extends Frame {
Panel panelShow = new Panel();
JList dataList;
BorderLayout bordL = new BorderLayout();
JTextField textField; public JListDemo() {
try {
textField=new JTextField("first");
String[] data = {"one", "two", "free", "four"};
JList dataList = new JList(data);
panelShow.setLayout(bordL);
dataList.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(MouseEvent e) {
textField.setText("change");
}
});
dataList.setVisibleRowCount(12); // Add list to a scrollpane
JScrollPane scrollPane = new JScrollPane(dataList);
panelShow.add(scrollPane);
String str="c:/csdn.gif";
JButton butt=new JButton(createImageIcon("csdn.gif", "Splash.accessible_description"));
// Button1 = new JButton(new ImageIcon("tray1.gif"));
butt.addKeyListener(new java.awt.event.KeyAdapter(){
public void keyPressed(KeyEvent e)
{
if(e.getKeyCode()==KeyEvent.VK_ENTER)
textField.setText("wwwwww");
}
});
panelShow.add(textField, BorderLayout.SOUTH);
panelShow.add(butt, BorderLayout.EAST);
this.add(panelShow, BorderLayout.CENTER);
}
catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
JListDemo JListDemo = new JListDemo(); JListDemo.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
});
JListDemo.setBounds (120,120,300,300);
JListDemo.show ();
}
public ImageIcon createImageIcon(String filename, String description) {
String path = "/images/" + filename;
return new ImageIcon(getClass().getResource(path));
}}