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Editorial Team
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Asked: 2026-06-11T08:03:35+00:00

When I run a Java program with a command line option -DsocksProxyHost 10.123.76.20 ,

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When I run a Java program with a command line option -DsocksProxyHost 10.123.76.20, I got an error : 

java.lang.NoClassDefFoundError: 10/123/76/20
Caused by: java.lang.ClassNotFoundException: 10.123.76.20
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: 10.123.76.20.  Program will exit.
Exception in thread "main"
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1 Answer

  1. Editorial Team

    -D should be used as follows:

    -DsocksProxyHost=10.123.76.20
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