Two classes cannot be put in a .java file

Twoclassescannotbeputin a.java file.

Forexample :

publicclassFinalTest

{

String color="yellow";

 

publicvoidgetMes()

{

System.out.println("parent class variable of color: "+color);

}

 

}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////

publicclasstest extendsFinalTest

{

String color="blue";

publicvoidgetMes()

{

System.out.println("child class variable of color: "+color);

}

 

public staticvoidmain (String[] args)

{

test t=newtest();

 

t.getMes();

}

}

Thought it's a simply programming ,it took me nearly half an hour to check out where goes wrong.---I put them in a same .java file ,and hadn't create a test.java in the package folder.
PS:A function which is the type of final cannot be rewrite in its child class .