I'm not able to run a class file on the command line even though there are no problems with Java installation and path variables settings

I've been using Eclipse to practice programming Java for a while. Haven't got any problems so far, but today I just wanted to compile and run my code on the command line (I'm using Windows OS) and it's not working.

Suppose the compiled file name is 'Test.class'. After compiling, when I put 'java Test' on the command line then error message says, "couldn't find or load main class Test"

But I have set all the system variables like %JAVA_HOME%, Path, CLASSPATH and had no problems running that code on Eclipse.

Below are screenshots of my setting information on the command line. (Please ignore the Korean words)

system variables

when I entered 'java' on the command line

when I entered 'javac' on the command line

checking java version

No Problems, Right? But the error occurred, when I entered 'java Test' to run this code after compiling Test.java to Test.class (The letters you can't understand is Korean, ignore it, it says "couldn't find or load main class Test")

Help me Please!

------------------Below is additional screenshot----------------------- ... Can you see? I compiled TestClass.java and converted it into TestClass.class but when I executed "java TestClass", the error appears.

Below is my code..... I did almost nothing on the code, just wanted to test command line method....

TestClass.java

package test;

public class TestClass {

    public static void main(String[] args) {
        System.out.println("SOS");
    }

}