无法使applet在IntelliJ中工作

Question

我是一个完整的菜鸟.我只是学习使用java编程.我按照教程在我兄弟的计算机上的IntelliJ Idea中创建了以下applet:

import javax.swing.JApplet;
import java.awt.Graphics;
public class MyFirstApplet extends JApplet {
    public void paint(Graphics g) {
        g.drawString("To climb a ladder, start at the bottom rung.", 20, 90);
    }
}

当我尝试运行它时,IDE显示:

"Exception in thread "main" java.security.AccessControlException: access denied ("java.io.FilePermission" "C:\Users\Abhirup_2\AppData\Local\Temp\AppletPage6525114136327939228.html" "read")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:372)
    at java.security.AccessController.checkPermission(AccessController.java:559)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at java.lang.SecurityManager.checkRead(SecurityManager.java:888)
    at java.io.File.isDirectory(File.java:838)
    at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:82)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
    at sun.applet.AppletViewer.parse(AppletViewer.java:1103)
    at sun.applet.AppletViewer.parse(AppletViewer.java:1074)
    at sun.applet.Main.run(Main.java:156)
    at sun.applet.Main.main(Main.java:98)
    at sun.applet.AppletViewer.main(AppletViewer.java:1257)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Process finished with exit code 1

然而它在我的朋友的计算机上运行得很好.请帮忙.

更新:有一个帐户,这是我兄弟的帐户.如果我没有错的话,我正在使用它,并且是唯一一个应该拥有管理员权利的帐户.

Answer 1

您需要使用applet策略文件,该文件授予作为本地applet运行的权限,并在"策略文件"字段中的运行/调试配置中设置它.

它应至少具有以下内容:

grant {
    permission java.security.AllPermission;
}

或者,您可以使用IntelliJ在名为appletviewer.policy的应用程序bin目录中提供的默认值