Linux 下 Error: Could not find or load main class Hello

Problem description: upload the java file on the machine to linux,

javac Test.java
ls
Test.class  Test.java  

But java Test has an error and the file cannot be found

java Test
Error: Could not find or load main class Test

Environment variables can determine no problem
Environment Variables View

How to solve?
Open the Test.java file and find that it starts with package test;! ! ! !
Just log out
//package test;