Cannot find symbol error

[dan0]

Can anyone tell me how to resolve the following compile-time error?

TestUserInterface.java:5: cannot find symbol
symbol: class UserInterface
location: class projects.web.TestUserInterface
UserInterface ui = new UserInterface();

I have two classes: UserInterface and TestUserInterface. Both are in the same package.

To compile and run them I use the following cmds respectively:

javac -d ..\classes projects\web\TestUserInterface.java

java -cp ..\classes projects.web.TestUserInterface

Following is the code for both classes:

package projects.web;
 
import java.awt.*;
import javax.swing.*;
 
public class UserInterface extends JFrame{
	
	JPanel menuPanel = new JPanel();
	JPanel contentPanel = new JPanel();
	JPanel selectionPanel = new JPanel();
	
	JButton save = new JButton("Save");
	JButton addFiles = new JButton("Add");
	
	public UserInterface(){
	super("File Upload");
	setSize(500, 500);
	
	menuPanel.add(addFiles);
	selectionPanel.add(save);
	
	setLayout(new BorderLayout());
	add(menuPanel, BorderLayout.NORTH);
	add(contentPanel, BorderLayout.CENTER);
	add(selectionPanel, BorderLayout.SOUTH);
	
	} // end constructor
    
} // end UserInterface clas

package projects.web;
 
public class TestUserInterface{
	public static void main(String[] args){
		UserInterface ui = new UserInterface();
	}
} // end TestUserInterface class

[dan0]

Problem was the code; it was creating the interface, but not displaying it. To resolve problem needed to add:

setVisible(true);

in UserInterface constructor.