Add login frame class.

JTankTrouble.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+

src/LoginFrame.java

+import javax.swing.*;
+import javax.swing.border.LineBorder;
+import javax.swing.border.TitledBorder;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.util.Scanner;
+
+public class LoginFrame extends JFrame {
+
+    private JTextField userName;
+    private JPasswordField passwordField;
+    private JCheckBox remindMe;
+    private JPanel informationPanel;
+    private JPanel buttonPanel;
+    private JButton signIn;
+    private JButton signUp;
+    private ImageIcon tankPhoto;
+
+
+    public LoginFrame() {
+
+        setBackground(Color.WHITE);
+        setResizable(false);
+        setLayout(new BorderLayout());
+        setBounds(700, 250, 320, 515);
+
+//        initLoginFrame();
+//        initRemindMe();
+//        initInformationPanel();
+        setVisible(true);
+
+    }
+}

src/Main.java

+public class Main {
+
+    public static void main(String[] args) {
+        System.out.println("Hello World!");
+    }
+}