My code compiles in Eclipse but I get a ClassNotFound at runtime how can I fix it?

Question

What would cause a jar to be added successfully to an Eclipse Java project but then at runtime some of the classes from that jar are not found with ClassNotFound exceptions?

Answer 1

运行时的CLASSPATH变量设置可能不正确，或者您错过了向jar文件中添加某些类的操作。