Lỗi khi dùng exception NoSuchMethod trong Java

[forevercode (Học hỏi)]

Mình đang tìm hiểu Try cath throw exception trong Java
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Rồi mình try catch cái NoSuchMethodException e
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Thanks

[Joe (Schwarz)]

First, don’t post screenshots of code. It looks bad, is hard to read, and is rude.
Second, you misunderstand reflection in Java. The NoSuchMethodException is thrown when you try to call a method via reflection with an unknown method name. What you have done here is calling an UNKNOWN method. This has nothing to do with calling via reflection. That is why you get the message “The method ren() is undefined”

[forevercode (Học hỏi)]

@Joe

First, don’t post screenshots of code. It looks bad, is hard to read, and is rude.

Thank you for your opinion