Why can't be Java Swing code run in Windows command line?

Question

Here is the Java I try to run from command line:

package my;

import javax.swing.*;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
class Login extends JFrame{
    JLabel l1,l2,l3;
    JTextField t1;
    JPasswordField t2;
    JButton b1;
    Login(){
        Font f=new Font("Arial",Font.BOLD,24);
        l1=new JLabel("my.Login Page");
        l1.setFont(f);
        l2=new JLabel("UserName");
        t1=new JTextField();
        l3=new JLabel("Password");
        t2=new JPasswordField();
        b1=new JButton("my.Login");
        l1.setBounds(70,40,200,40);
        l2.setBounds(70,100,100,20);
        t1.setBounds(70,120,200,30); 
        l3.setBounds(70,170,100,20);
        t2.setBounds(70,190,200,30);
        b1.setBounds(170,240,100,30);
        add(l1);
        add(l2);
        add(t1);
        add(l3);
        add(t2);
        add(b1);
        setLayout(null);
        setVisible(true);
        setSize(400,400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        b1.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent ae){
                System.out.println(t1.getText());
                System.out.println(String.valueOf(t2.getPassword()));
            }
        });
    }
    public static void main(String[] args){
        Login login=new Login();
    }
}

with the following commands:

javac my\Login.java

java my.Login

Earlier I was able to run it when I wrote Java code in IntellIJ even in IDE and in command line, too. However, now I only can run swing Java code in IntellIJ.

When I try to run it in command line, I get the following:

Error: Could not find or load main class my.Login

Is there any mode to be able run swing codes from command line? Why do I get error when I try to run this code in command line? I have Java 8 in my computer, Java is added to PATH.

Answer 1

The issue is the line of code:

package my;

When running your program, you probably didn't specify the filepath of the package root. Assuming your filepath to the package is: \folder\my\Login.java , you need to change directory to \folder in the terminal before running the compiling and executing commands.