cmdでJavaプログラムを実行する方法

小さなアプリを完成させました。だから今私はコマンドプロンプトで結果を見たいと思います。（Eclipseではうまく機能します）。

私が（確かに）コマンドプロンプトでコンパイルすることを決めた最初のステップは、私のプログラムです：

javac appNegozio.java

私はエラーなしでコンパイルしましたが、実際にはファイル.classがあります（すべてのプログラムには1つのクラスしかありませんが、いくつかの内部クラスがあるため、複数の.classファイルがあります）

プログラムを実行しようとすると、次のようになります。

java appNegozio

プロンプトでこの問題が発生しました：

Exception in thread "main" java.lang.NoClassDefFoundError: appNegozio (wrong nam
    e: prgStore/appNegozio)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$100(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

しかし、私はなぜ...そして私がしなければならないことを理解していません...

これは私のコードです：>

package prgStore;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.SpringLayout;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class appNegozio extends JFrame {

private JPanel contentPane;
private JTextField textField;
private JTextField textField_1;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    appNegozio frame = new appNegozio();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public appNegozio() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        SpringLayout sl_contentPane = new SpringLayout();
        contentPane.setLayout(sl_contentPane);

        textField = new JTextField();
        sl_contentPane.putConstraint(SpringLayout.NORTH, textField, 10, SpringLayout.NORTH, contentPane);
        sl_contentPane.putConstraint(SpringLayout.WEST, textField, 62, SpringLayout.WEST, contentPane);
        contentPane.add(textField);
        textField.setColumns(10);

        textField_1 = new JTextField();
        sl_contentPane.putConstraint(SpringLayout.NORTH, textField_1, 16, SpringLayout.SOUTH, textField);
        sl_contentPane.putConstraint(SpringLayout.WEST, textField_1, 0, SpringLayout.WEST, textField);
        contentPane.add(textField_1);
        textField_1.setColumns(10);

        JLabel lblNome = new JLabel("Nome");
        sl_contentPane.putConstraint(SpringLayout.NORTH, lblNome, 10, SpringLayout.NORTH, contentPane);
        sl_contentPane.putConstraint(SpringLayout.EAST, lblNome, -7, SpringLayout.WEST, textField);
        contentPane.add(lblNome);

        JLabel lblCognome = new JLabel("Cognome");
        sl_contentPane.putConstraint(SpringLayout.NORTH, lblCognome, 0, SpringLayout.NORTH, textField_1);
        sl_contentPane.putConstraint(SpringLayout.EAST, lblCognome, -6, SpringLayout.WEST, textField_1);
        contentPane.add(lblCognome);

        JButton btnSubmit = new JButton("Submit");
        btnSubmit.addActionListener(new ActionListener() {
            int a, b;
            public void actionPerformed(ActionEvent e) {
                System.out.println();
            }
        });
        sl_contentPane.putConstraint(SpringLayout.NORTH, btnSubmit, 24, SpringLayout.SOUTH, textField_1);
        sl_contentPane.putConstraint(SpringLayout.WEST, btnSubmit, 10, SpringLayout.WEST, contentPane);
        contentPane.add(btnSubmit);
    }
}

    package prgStore;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.SpringLayout;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class appNegozio extends JFrame {

    private JPanel contentPane;
    private JTextField textField;
    private JTextField textField_1;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    appNegozio frame = new appNegozio();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public appNegozio() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        SpringLayout sl_contentPane = new SpringLayout();
        contentPane.setLayout(sl_contentPane);

        textField = new JTextField();
        sl_contentPane.putConstraint(SpringLayout.NORTH, textField, 10, SpringLayout.NORTH, contentPane);
        sl_contentPane.putConstraint(SpringLayout.WEST, textField, 62, SpringLayout.WEST, contentPane);
        contentPane.add(textField);
        textField.setColumns(10);

        textField_1 = new JTextField();
        sl_contentPane.putConstraint(SpringLayout.NORTH, textField_1, 16, SpringLayout.SOUTH, textField);
        sl_contentPane.putConstraint(SpringLayout.WEST, textField_1, 0, SpringLayout.WEST, textField);
        contentPane.add(textField_1);
        textField_1.setColumns(10);

        JLabel lblNome = new JLabel("Nome");
        sl_contentPane.putConstraint(SpringLayout.NORTH, lblNome, 10, SpringLayout.NORTH, contentPane);
        sl_contentPane.putConstraint(SpringLayout.EAST, lblNome, -7, SpringLayout.WEST, textField);
        contentPane.add(lblNome);

        JLabel lblCognome = new JLabel("Cognome");
        sl_contentPane.putConstraint(SpringLayout.NORTH, lblCognome, 0, SpringLayout.NORTH, textField_1);
        sl_contentPane.putConstraint(SpringLayout.EAST, lblCognome, -6, SpringLayout.WEST, textField_1);
        contentPane.add(lblCognome);

        JButton btnSubmit = new JButton("Submit");
        btnSubmit.addActionListener(new ActionListener() {
            int a, b;
            public void actionPerformed(ActionEvent e) {
                System.out.println();
            }
        });
        sl_contentPane.putConstraint(SpringLayout.NORTH, btnSubmit, 24, SpringLayout.SOUTH, textField_1);
        sl_contentPane.putConstraint(SpringLayout.WEST, btnSubmit, 10, SpringLayout.WEST, contentPane);
        contentPane.add(btnSubmit);
    }
}

ありがとうございました