[英]Run java applet offline: Exception in thread “main” java.lang.NoClassDefFoundError
I just downloaded some java applets from this site: http://www.surendranath.org/Apps.html to run them offline on my laptop. 我刚刚从此站点下载了一些Java applet: http : //www.surendranath.org/Apps.html ,可在笔记本电脑上离线运行它们。 Take for example this one: http://www.surendranath.org/Applets/Oscillations/Lissajous/Lissajous.html 以这个为例: http : //www.surendranath.org/Applets/Oscillations/Lissajous/Lissajous.html
By inspecting the source code I downloaded the file: wget http://www.surendranath.org/Applets/Oscillations/Lissajous/LissajousApplet.class
通过检查源代码,我下载了文件: wget http://www.surendranath.org/Applets/Oscillations/Lissajous/LissajousApplet.class
Then I tried it to run it on my ubuntu box via gappletviewer-4.8 -code LissayousApplet.class
然后我尝试通过gappletviewer-4.8 -code LissayousApplet.class
在我的Ubuntu盒子上运行它
However I got the following error message: 但是我收到以下错误消息:
Exception in thfully qualifiedread "main" java.lang.NoClassDefFoundError: loaded class LissajousApplet was in fact named Applets.Oscillations.Lissajous.LissajousApplet
at java.lang.VMClassLoader.defineClass(libgcj.so.14)
at java.lang.ClassLoader.defineClass(libgcj.so.14)
at java.security.SecureClassLoader.defineClass(libgcj.so.14)
at java.net.URLClassLoader.findClass(libgcj.so.14)
at java.lang.ClassLoader.loadClass(libgcj.so.14)
at java.lang.ClassLoader.loadClass(libgcj.so.14)
at java.lang.ClassLoader.loadClass(libgcj.so.14)
at gnu.classpath.tools.appletviewer.Main.createApplet(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.StandaloneAppletWindow.<init>(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.StandaloneAppletViewer.createWindows(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.StandaloneAppletViewer.<init>(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.Main.main(libgcj-tools.so.14)
So what is the correct way to run this applet offline ? 那么, 离线运行此applet的正确方法是什么? Running it online within my browser and the icetea plugin works. 在我的浏览器中在线运行它,icetea插件可以运行。 However I need a way to run it offline. 但是我需要一种脱机运行它的方法。
Edit 编辑
Trying the fully qualified class-name results in: 尝试完全限定的类名会导致:
gappletviewer-4.8 -code Applets.Oscillations.Lissajous.LissajousApplet.class -codebase codebase="../../../"
WARNING: CURRENTLY GAPPLETVIEWER RUNS WITH NOSECURITY MANAGER.
THIS MEANS THAT APPLETS YOU LOAD CAN DO ANYTHING A JAVA APPLICATION
THAT YOU DOWNLOAD AND RUN CAN DO. BE *VERY* CAREFUL WHICH APPLETS YOU RUN.
DO NOT USE GAPPLETVIEWER ON YOUR SYSTEM IF YOUR SYSTEM STORES IMPORTANTDATA.
THIS DATA CAN BE DESTROYED OR STOLEN IF YOU LOAD A MALICIOUS APPLET.
[press 'c' or 'C' to continue or anything else to quit]
c
java.lang.ClassNotFoundException: Applets.Oscillations.Lissajous.LissajousApplet not found in gnu.classpath.tools.appletviewer.AppletClassLoader{urls=[file:/home/null,file:/home/], parent=gnu.gcj.runtime.SystemClassLoader{urls=[file:./], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}}
at java.net.URLClassLoader.findClass(libgcj.so.14)
at gnu.classpath.tools.appletviewer.AppletClassLoader.findClass(libgcj-tools.so.14)
at java.lang.ClassLoader.loadClass(libgcj.so.14)
at java.lang.ClassLoader.loadClass(libgcj.so.14)
at gnu.classpath.tools.appletviewer.Main.createApplet(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.StandaloneAppletWindow.<init>(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.StandaloneAppletViewer.createWindows(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.StandaloneAppletViewer.<init>(libgcj-tools.so.14)
at gnu.classpath.tools.appletviewer.Main.main(libgcj-tools.so.14)
Try using the fully qualified classname 尝试使用完全限定的类名
gappletviewer-4.8 -code Applets.Oscillations.Lissajous.LissajousApplet.class -codebase codebase="http://www.surendranath.org/"
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