无法在 IntelliJ 中制作小程序 [英] Unable to make an applet work in IntelliJ

问题描述

我是个十足的菜鸟.我只是在学习使用 java 编程.我按照教程在我弟弟的电脑上用IntelliJ Idea创建了以下小程序:

I am a complete noob. I am just learning to program using java. I followed a tutorial and created the following applet in IntelliJ Idea in my brother's computer:

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:

When i try to run this , the IDE shows:

"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

但是它在我朋友的 eclipse 计算机上运行良好.请帮忙.

However it runs well in my friend's computer in eclipse. Please help.

更新:有一个帐户，那就是我兄弟的帐户.如果我没记错的话，我正在使用它并且是它应该拥有管理员权限的唯一帐户.

UPDATE: There is a single account and that is my brother's acoount. I am using that and being the only account it should have admiistrator rights if I am not wrong.

推荐答案

您需要使用小程序策略文件，该文件授予作为本地小程序运行的权限，并在策略文件"字段的运行/调试配置中进行设置.

You need to use an applet policy file which grants permission to run as a local applet and set it in your Run/Debug configuration in the "Policy File" field.

它至少应具有以下内容:

It should have at minimum the following:

grant {
    permission java.security.AllPermission;
}

或者你可以使用 IntelliJ 在应用程序 bin 目录中提供的默认一个名为 appletviewer.policy

Or you can use the default one provided by IntelliJ in the application bin directory called appletviewer.policy

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