Thread: GUI won't load up on repl.it

//When I have the GUI in a separate file it works, but having it with this entire code it won't work. Any help is great!

import java.lang.Math; // headers MUST be above the first class
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JLabel;
 
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
import java.awt.BorderLayout;
import java.awt.GridLayout;
 class Screen implements ActionListener {
  public Screen(){
    JFrame frame=new JFrame(); //adds jframe 
 
    JButton button=new JButton("Deposit");  //creates a button
    button.addActionListener(this);  //makes button clickable
 
    JLabel label = new JLabel("Select deposit amount");  //sets title
 
    JPanel panel = new JPanel(); // screen for program
    panel.setBorder(BorderFactory.createEmptyBorder(100, 100, 100, 100));//size of screen
    panel.setLayout(new GridLayout(0,1));//layout for screen
    panel.add(button);//adds button
    panel.add(label);//adds label
 
    frame.add(panel, BorderLayout.CENTER);//sets screen to center
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// exits screen
    frame.setTitle("Deposits");//sets tile
    frame.pack();//
    frame.setVisible(true);    //set screen to visible
 
  }
  public static void Screen(String[] args){
    new Screen();
  }
  public void actionPerformed(ActionEvent e){
 
  }
}
class Main
{
 public static void main (String []args)
 {
    Sweringen_BankAccount BankAccountOne = new Sweringen_BankAccount();  //Settinge up account 1
 
    Sweringen_BankAccount BankAccountTwo = new Sweringen_BankAccount();  //Setting up account 2
 
    BankAccountOne.setAccountNumber("1");                   //setting up account number
    BankAccountOne.setAccountType("Savings");               //setting up account type
 
    BankAccountTwo.setAccountNumber("2");                                    //setting up account number
    BankAccountOne.setAccountType("Savings");               //setting up account type
    BankAccountTwo.setAccountType("Checkings");
 
     System.out.println( BankAccountOne.getAccountType()+ " is account  " + BankAccountOne.getAccountNumber()  +
                       " owned by " + BankAccountOne.getAccountHolder());  //printing account type, holder, and balance
    System.out.println(BankAccountTwo.getAccountType() + " is account " + BankAccountTwo.getAccountNumber() +
                       " owned by " + BankAccountTwo.getAccountHolder() );//printing account type, holder, and balance
    System.out.println("Savings account withholds " +  BankAccountOne.getAccountBalance() + " dollars");//printing account type, holder, and balance
    System.out.println("Savings account withholds " +  BankAccountTwo.getAccountBalance() + " dollars");//printing account type, holder, and balance
 
 
 }
}
class Sweringen_BankAccount
{
 private String AccountNumber;           //variable for account number
 private String AccountType;//variable for account type
 private String AccountHolder; //variable for account holder
 static private int AccountBalance=0;  // variable for account balance
 
 /******************* Mutator Methods ****************/
 public void setAccountNumber (String AccountNumber)
 {
    this.AccountNumber= AccountNumber;//
    AccountHolder = "Max"; //naming account holder
 }
 public void setAccountType (String AccountType)
 {
    this.AccountType= AccountType;
    AccountBalance++;
 } 
 
 /******************* Accessor Methods ****************/  
 public String getAccountNumber()  
 {
    return AccountNumber;
 }
 public String getAccountType()
 {
    return AccountType;
 }
 public String getAccountHolder()
 {
    return AccountHolder;
 }
 static public int getAccountBalance()
 {
    return AccountBalance;
 }
}

 javac -classpath .:/run_dir/junit-4.12.jar:target/dependency/* -d . Main.java
 java -classpath .:/run_dir/junit-4.12.jar:target/dependency/* Main
Savings is account 1 owned by Max
Checkings is account 2 owned by Max
Savings account withholds 3 dollars
Savings account withholds 3 dollars

it won't work.

Please explain what happens when you try to compile and execute the code.
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