Done!

part-1/Click.java

@@ -0,0 +1,30 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class Click extends JFrame implements ActionListener {
+    private JLabel label;
+    private JButton button;
+    private int count =0;
+    public Click() {
+        setTitle("Click Counter");
+        label = new JLabel("Clicks : 0" , SwingConstants.CENTER);
+        button = new JButton("Click Me");
+        button.addActionListener(this);
+        setLayout(new BorderLayout());
+        add(label, BorderLayout.CENTER);
+        add(button, BorderLayout.SOUTH);
+
+    }
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> new Click().setVisible(true));
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        count++;
+        label.setText("Clicks : " + count);
+    }
+}

part-2/GreetingFromApp.java

@@ -0,0 +1,40 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class GreetingFromApp extends JFrame implements ActionListener {
+    private JTextField nameFeild;
+    private JButton greetButton;
+    private JLabel messageLabel;
+    public GreetingFromApp() {
+        setTitle("Greeting From ");
+        nameFeild = new JTextField(15);
+        greetButton = new JButton("Greet");
+        messageLabel= new JLabel("Enter your name and press Greet", SwingConstants.CENTER);
+        greetButton.addActionListener(this);
+        JPanel panel = new JPanel();
+        panel.add(new JLabel("Name:"));
+        panel.add(nameFeild);
+        panel.add(greetButton);
+        setLayout(new BorderLayout());
+        add(panel, BorderLayout.NORTH);
+        add(messageLabel, BorderLayout.CENTER);
+    }
+
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> new GreetingFromApp().setVisible(true));
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        String name = nameFeild.getText().trim();
+        if (name.isEmpty()) {
+            messageLabel.setText("Please enter your name");
+        }else {
+            messageLabel.setText("Hello"+name + "!");
+        }
+
+    }
+}

part-3/ColorSelector.java

@@ -0,0 +1,66 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class ColorSelector extends JFrame implements ActionListener {
+    public JPanel main;
+    public JButton red;
+    public JButton green;
+    public JButton blue;
+    public JButton yellow;
+    public JButton orange;
+    public JButton cyan;
+    public ColorSelector() {
+        setTitle("Theme Color Selector");
+
+        main = new JPanel();
+
+        red = new JButton("Red");
+        green = new JButton("Green");
+        blue = new JButton("Blue");
+        yellow = new JButton("Yellow");
+        orange = new JButton("Orange");
+        cyan = new JButton("Cyan");
+
+        red.setActionCommand("RED");
+        green.setActionCommand("GREEN");
+        blue.setActionCommand("BLUE");
+        yellow.setActionCommand("YELLOW");
+        orange.setActionCommand("ORANGE");
+        cyan.setActionCommand("CYAN");
+
+        red.addActionListener(this);
+        green.addActionListener(this);
+        blue.addActionListener(this);
+        yellow.addActionListener(this);
+        orange.addActionListener(this);
+        cyan.addActionListener(this);
+
+        JPanel buttonPanel = new JPanel();
+        buttonPanel.add(red);
+        buttonPanel.add(green);
+        buttonPanel.add(blue);
+        buttonPanel.add(yellow);
+        buttonPanel.add(orange);
+        buttonPanel.add(cyan);
+
+        setLayout(new BorderLayout());
+        add(buttonPanel, BorderLayout.NORTH);
+        add(main, BorderLayout.CENTER);
+    }
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        switch (e.getActionCommand()) {
+            case "RED":   main.setBackground(Color.red);   break;
+            case "GREEN": main.setBackground(Color.green); break;
+            case "BLUE":  main.setBackground(Color.blue);  break;
+            case "YELLOW":  main.setBackground(Color.yellow); break;
+            case "ORANGE":  main.setBackground(Color.orange); break;
+            case "CYAN":  main.setBackground(Color.cyan); break;
+        }
+    }
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> new ColorSelector().setVisible(true));
+    }
+}

part-4/RegistrationFormApp.java

@@ -0,0 +1,93 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class RegistrationFormApp extends JFrame implements ActionListener {
+    private JTextField txtName;
+    private JTextField txtEmail;
+    private JPasswordField txtPassword;
+    private JRadioButton rbMale, rbFemale;
+    private JCheckBox cbJava, cbPython, cbCpp;
+    private JButton btnSubmit;
+    private GridBagConstraints gbc;
+    public RegistrationFormApp() {
+        setTitle("User Registration");
+        setSize(500, 350);
+        setDefaultCloseOperation(EXIT_ON_CLOSE);
+        setLocationRelativeTo(null);
+
+        JPanel panel = new JPanel(new GridBagLayout());
+        gbc = new GridBagConstraints();
+        gbc.insets = new Insets(5, 5, 5, 5);
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+
+
+        gbc.gridx = 0; gbc.gridy = 0;
+        panel.add(new JLabel("Name:"), gbc);
+        gbc.gridx = 1;
+        txtName = new JTextField(20);
+        panel.add(txtName, gbc);
+
+
+        gbc.gridx = 0; gbc.gridy = 1;
+        panel.add(new JLabel("Email:"), gbc);
+        gbc.gridx = 1;
+        txtEmail = new JTextField(20);
+        panel.add(txtEmail, gbc);
+
+
+        gbc.gridx = 0; gbc.gridy = 2;
+        panel.add(new JLabel("Password:"), gbc);
+        gbc.gridx = 1;
+        txtPassword = new JPasswordField(20);
+        panel.add(txtPassword, gbc);
+
+
+        gbc.gridx = 0; gbc.gridy = 3;
+        panel.add(new JLabel("Gender:"), gbc);
+        gbc.gridx = 1;
+        rbMale = new JRadioButton("Male"); rbFemale = new JRadioButton("Female");
+        ButtonGroup bg = new ButtonGroup(); bg.add(rbMale); bg.add(rbFemale);
+        JPanel genderPanel = new JPanel(); genderPanel.add(rbMale); genderPanel.add(rbFemale);
+        panel.add(genderPanel, gbc);
+
+
+        gbc.gridx = 0; gbc.gridy = 4;
+        panel.add(new JLabel("Interests:"), gbc);
+        gbc.gridx = 1;
+        cbJava = new JCheckBox("Java"); cbPython = new JCheckBox("Python"); cbCpp = new JCheckBox("C++");
+        JPanel interestPanel = new JPanel();
+        interestPanel.add(cbJava); interestPanel.add(cbPython); interestPanel.add(cbCpp);
+        panel.add(interestPanel, gbc);
+
+
+        gbc.gridx = 1; gbc.gridy = 5;
+        gbc.anchor = GridBagConstraints.CENTER;
+        btnSubmit = new JButton("Submit");
+        btnSubmit.addActionListener(this);
+        panel.add(btnSubmit, gbc);
+
+        add(panel);
+    }
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        String name = txtName.getText();
+        String email = txtEmail.getText();
+        String gender = rbMale.isSelected() ? "Male" : rbFemale.isSelected() ? "Female" : "Unspecified";
+        String interests = "";
+        if (cbJava.isSelected()) interests += "Java ";
+        if (cbPython.isSelected()) interests += "Python ";
+        if (cbCpp.isSelected()) interests += "C++ ";
+
+        JOptionPane.showMessageDialog(this,
+                "Name: " + name + "\n" +
+                        "Email: " + email + "\n" +
+                        "Gender: " + gender + "\n" +
+                        "Interests: " + interests,
+                "Registration Details", JOptionPane.INFORMATION_MESSAGE);
+    }
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> new RegistrationFormApp().setVisible(true));
+    }
+}