Code It

import java.util.concurrent.CountDownLatch; 

public class countdown 
{ 
    public static void main(String args[])  
                   throws InterruptedException 
    { 

//       Creating CountDownLatch , there are 3 task being executed 
        CountDownLatch cdl = new CountDownLatch(3); 
  
//       Naming tasks and setting delay times 
//        1 second delay
        Task Task_One = new Task(1000, cdl,  "task 1"); 
//        5 second delay
        Task Task_Two = new Task(5000, cdl,  "task 2"); 
//        3 second delay 
        Task Task_Three = new Task(3000, cdl,   "task 3"); 

//       Starting tasks
        Task_One.start(); 
        Task_Two.start(); 
        Task_Three.start(); 
      
  
        // The main task waits here
        cdl.await(); 
  
        // Main thread running 
        System.out.println(Thread.currentThread().getName() + 
                           " You have hacked the main frame!"); 
        
    } 
} 
  
// What main thread does while waiting  
class Task extends Thread 
{ 
    private int dt; 
    private CountDownLatch cdl; 
  
    public Task(int dt, CountDownLatch cdl, 
                                    String name) 
    { 
        super(name); 
        this.dt = dt; 
        this.cdl = cdl; 
    } 
  
    @Override
    public void run() 
    { 
        try
        { 
//           task ran complete print finished 
            Thread.sleep(dt); 
            cdl.countDown(); 
            System.out.println(Thread.currentThread().getName() 
                            + " finished"); 
        } 
//        if not throw exception 
        catch (InterruptedException e) 
        { 
            e.printStackTrace(); 
        } 
    } 
} 

task 1 finished
task 3 finished
task 2 finished
main You have hacked the main frame!

import qrcode

# Website link
url_link = "https://codeit.blog/"

#Generating Empty QR code
qr = qrcode.QRCode(
        # Editing Size of Qr image
        version=5,
        box_size=10,
        border=3)
# Adding the link to Qr
qr.add_data(url_link)
qr.make(fit=True)
img = qr.make_image()

# Saving Qr code to image file
img.save('qrLink.png')

    public static double coordinates (double LatOne, 
                     double LatTwo, double LonOne, 
                                  double LonTwo) 
    { 

        // toRadians function converts degrees to radians. 
        LonOne = Math.toRadians(LonOne); 
        LonTwo = Math.toRadians(LonTwo); 
        LatOne = Math.toRadians(LatOne); 
        LatTwo = Math.toRadians(LatTwo); 

        // Here the Haversine formula is being created 
        double deltaLon = LonTwo - LonOne;  
        double deltaLat = LatTwo - LatOne; 
        double formula = Math.pow(Math.sin(deltaLat / 2), 2) 
                 + Math.cos(LatOne) * Math.cos(LatTwo) 
                 * Math.pow(Math.sin(deltaLon / 2),2);      
        double fOutput = 2 * Math.asin(Math.sqrt(formula));

        // Earth's Radius multiplied by OP
        double r = 3956;  
        return(fOutput * r); 

    }  
    public static void main(String[] args) 

    { 

        // Input First destination Lon & Lat
        double LatOne =  -60.25901; 
        double LonOne = -12.82658;

       // Input Second destination Lon & Lat
        double LatTwo =  -47.01424; 
        double LonTwo = -148.97184; 

        //Printing output
        System.out.println("You are " + coordinates (LatOne, LatTwo, 
                           LonOne, LonTwo)+ " Miles Away"); 
    } 
} 

You are 4623.74 Miles Away

seconds = 0
def seconds_Timer(Timer):
    seconds = 0
    # Counting function
    def count():
        global seconds
        seconds += 1
        Timer.config(text=str(seconds))
        Timer.after(1000, count)
    count()

# Creating the frame
root = tk.Tk()
# Setting Label
root.title("Counter")
Timer = tk.Label(root, fg="blue")
Timer.pack()
# Calling the Timer Function
seconds_Timer(Timer)
# Stop Button
button_STP = tk.Button(root, text='Stop', fg="red" , width=40, command=root.destroy)
# Adding the button 
button_STP.pack()

root.mainloop()

// Create frame & title 
        JFrame frame= new JFrame(); 
        frame.setTitle("JFrame Check-In Demo");
         
               // Main Panel Frame
        JPanel mainPanel = new JPanel();
        mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
 
        JPanel headingPanel = new JPanel();
//Heading title
        JLabel headingLabel = new JLabel("Welcome, Please fill out form to Check-In");
        headingPanel.add(headingLabel);
         
// Panel to define the layout
        JPanel panel = new JPanel(new GridBagLayout());
        GridBagConstraints constr = new GridBagConstraints();
        constr.insets = new Insets(5, 5, 5, 5);     
        constr.anchor = GridBagConstraints.WEST;
 
 // Set the initial grid values to 0,0
        constr.gridx=0;
        constr.gridy=0;

        // Text  
        JLabel LabelOne  = new JLabel("Enter your name :");
        JLabel LabelTwo = new JLabel("Last 4 SSN :");
        JLabel LabelThree = new JLabel("Enter Phone # :");
         
        //  Edit Text  
        JTextField ClientName = new JTextField(20);
        JPasswordField Last = new JPasswordField(20);
        JTextField Phone  = new JTextField(20);
         
        panel.add(LabelOne , constr);
        constr.gridx=1;
        panel.add(ClientName, constr);
        constr.gridx=0; constr.gridy=1;
         
        panel.add(LabelTwo, constr);
        constr.gridx=1;
        panel.add(Last, constr);
        constr.gridx=0; constr.gridy=2;
         
        panel.add(LabelThree, constr);
        constr.gridx=1;
        panel.add(Phone , constr);
        constr.gridy=3;
         
        constr.gridwidth = 2;
        constr.anchor = GridBagConstraints.CENTER;

        // "Check-In Button"
        JButton button = new JButton("Check-In");
        // add ActionListener to button
        button.addActionListener(new ActionListener()
        {
          public void actionPerformed(ActionEvent e)
          {
        	  
        	//Reset edit Text and thank client   
            headingLabel.setText("Thanks for you for Checking-In");
            ClientName.setText("");
            Last.setText("");
            Phone .setText("");
            
            //Pop up Message 
            JOptionPane.showMessageDialog(frame,"Check-In confirmed,we will notify you.");  
            
          }
        });

 // Add label and button to panel
        panel.add(button, constr);
  
        mainPanel.add(headingPanel);
        mainPanel.add(panel);
 
// Add panel to frame
        frame.add(mainPanel);
        frame.pack();
                frame.setSize(400, 400);
                frame.setLocationRelativeTo(null);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

import javax.swing.*;  
public class op {  
JFrame f;  
op(){  
    f=new JFrame();  
    JOptionPane.showMessageDialog(f,"www.codeit.blog");  
}  
public static void main(String[] args) {  
    new op();  
}  
}  

import javax.swing.*;  
import java.awt.event.*;  
public class op extends WindowAdapter{  
JFrame f;  
op(){  
    f=new JFrame();   
    f.addWindowListener(this);  
    f.setSize(300, 300);  
    f.setLayout(null);  
    f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);  
    f.setVisible(true);  
}  
public void windowClosing(WindowEvent e) {  
    int i=JOptionPane.showConfirmDialog(f,"Confirm Payment");  
if(i==JOptionPane.YES_OPTION){  
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
}else {
	System.out.print("Nope this is not cool");
}
}  
public static void main(String[] args) {  
    new  op();  
}     
}

import javax.swing.*;  
public class op {  
JFrame f;  
op(){  
    f=new JFrame();   
    String Code=JOptionPane.showInputDialog(f,"Enter Verification Code");      
}  
public static void main(String[] args) {  
    new op();  
}  
}

import javax.swing.*;  
public class op {  
JFrame f;  
op(){  
    f=new JFrame();  
    JOptionPane.showMessageDialog(f,"Uh Oh something may be wrong","Warning",JOptionPane.WARNING_MESSAGE);     
}  
public static void main(String[] args) {  
    new op();  
}  
}  

import javax.swing.*;  
public class op {  
JFrame f;  
op(){  
    f=new JFrame();  
    JOptionPane.showMessageDialog(f,"Something is fucked up!","Error",JOptionPane.ERROR_MESSAGE);     
}  
public static void main(String[] args) {  
    new op();  
}  
}