import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.net.URL;
import java.io.*;public class Web extends JApplet{
private JEditorPane jep=new JEditorPane();
public void init(){
try{
URL url=new URL("http://www.sun.com/index.html");
getContentPane().add(new JScrollPane(jep));
jep.setPage(url);
}catch(IOException ex){
System.out.println(ex);
}
}
}为什么运行以后显示不出结果而且报错、、
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.net.URL;
import java.io.*;public class Web extends JApplet{
private JEditorPane jep=new JEditorPane();
public void init(){
try{
URL url=new URL("http://www.sun.com/index.html");
getContentPane().add(new JScrollPane(jep));
jep.setPage(url);
}catch(IOException ex){
System.out.println(ex);
}
}
}为什么运行以后显示不出结果而且报错、、
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最好用ex.pringStackTrace()来输出错误.
(java.net.SocketPermission www.sun.com:80 connect,resolve)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLCon
nection.java:883)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLCon
nection.java:1904)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:376
)
at javax.swing.JEditorPane.getStream(JEditorPane.java:689)
at javax.swing.JEditorPane.setPage(JEditorPane.java:406)
at Web.init(Web.java:16)
at sun.applet.AppletPanel.run(AppletPanel.java:378)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.security.AccessControlException: access denied (java.net.SocketP
ermission www.sun.com:80 connect,resolve)
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:264)
at java.security.AccessController.checkPermission(AccessController.java:
427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1034)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:459)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:214)
at sun.net.www.http.HttpClient.New(HttpClient.java:287)
at sun.net.www.http.HttpClient.New(HttpClient.java:299)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLC
onnection.java:792)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConne
ction.java:744)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection
.java:669)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLCon
nection.java:913)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:367
)
... 5 more
这是所有的错误信息、、