java.lang.IllegalArgumentException：不允许使用空白

Question

我正在尝试在网页上嵌入一个小程序。我已经将代码导出为IntelliJ中的压缩applet。现在，当我尝试运行它时，我得到以下堆栈跟踪：

java.lang.IllegalArgumentException: white space not allowed
    at java.net.URLPermission.normalizeHeaders(URLPermission.java:401)
    at java.net.URLPermission.init(URLPermission.java:189)
    at java.net.URLPermission.<init>(URLPermission.java:166)
    at sun.net.www.protocol.http.HttpURLConnection.URLtoSocketPermission(HttpURLConnection.java:1031)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1424)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at com.sun.deploy.net.HttpUtils.followRedirects(Unknown Source)
    at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
    at com.sun.deploy.net.BasicHttpRequest.doGetRequestEX(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.checkUpdateAvailable(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.isUpdateAvailable(Unknown Source)
    at com.sun.deploy.cache.DeployCacheHandler.get(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1048)
    at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:987)
    at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:985)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessController.doPrivileged(AccessController.java:713)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:984)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
    at sun.net.www.protocol.http.HttpURLConnection.followRedirect0(HttpURLConnection.java:2648)
    at sun.net.www.protocol.http.HttpURLConnection.access$300(HttpURLConnection.java:90)
    at sun.net.www.protocol.http.HttpURLConnection$12.run(HttpURLConnection.java:2565)
    at sun.net.www.protocol.http.HttpURLConnection$12.run(HttpURLConnection.java:2563)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessController.doPrivileged(AccessController.java:713)
    at sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2562)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1768)
    at sun.net.www.protocol.http.HttpURLConnection.access$200(HttpURLConnection.java:90)
    at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1431)
    at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1429)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessController.doPrivileged(AccessController.java:713)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1428)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at sun.plugin.PluginURLJarFileCallBack.downloadJAR(Unknown Source)
    at sun.plugin.PluginURLJarFileCallBack.access$000(Unknown Source)
    at sun.plugin.PluginURLJarFileCallBack$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.plugin.PluginURLJarFileCallBack.retrieve(Unknown Source)
    at sun.net.www.protocol.jar.URLJarFile.retrieve(URLJarFile.java:205)
    at sun.net.www.protocol.jar.URLJarFile.getJarFile(URLJarFile.java:71)
    at sun.net.www.protocol.jar.JarFileFactory.get(JarFileFactory.java:99)
    at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:122)
    at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
    at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFileInternal(Unknown Source)
    at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$1000(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.<init>(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
    at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:744)
Ignored exception: java.lang.IllegalArgumentException: white space not allowed

我相信该错误是由于试图使用applet类中的getImage()方法获取图像而导致的。这是代码：

try {
    image = new ImageIcon(main.getImage(main.getCodeBase(), imageName + ".png"));
} catch (Exception e) {
    e.printStackTrace();
}

下面是我在HTML中使用的标记以供参考：

如果您想亲自查看错误，只需访问http://nrubin29.github.io/freefall-applets/

谢谢！

Answer 1

如果您使用的是Java8，那么这个行为似乎存在一个开放的bug：

https://bugs.openjdk.java.net/browse/jdk-8042622？page=com.atlassian.jira.plugin.system.issueTabPanels：ChangeHistory-TabPanel

本质上，bug是Java中的一个核心bug，您所能做的任何事情都无法修复它。所以您必须等待Java8u40（如果修复程序实际达到目标版本）。