eclipes tomcat 404 error could not find java file - java

can anyone help me please. I'm using eclipse IDE and apache tomcat 9.0.12. I'm trying to do my assigment where we have to create html and java file. My html file works just fine but the problem occurs when im trying to get the data from java file. I already watch youtube and google but their problem is different than mine. I dont have typo or any simple problem .. I think it is a path problem but i don't know how. it seems like eclipes coudlnt find where my java file located.[[enter image description here](https://i.stack.imgur.com/RJ7Ed.png)](https://i.stack.imgur.com/cbOZl.png)
i trie to check typo, change localhost path , no different

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