Can you convert this program from JOptionpane to System.out.print? please import

Question

Can you convert this program from JOptionpane to System.out.print? please

import javax.swing.JOptionPane;
import java.util.Scanner;
import java.io.*;

class Validator
{
//Array of valid numbers
private int[] valid;
public Validator() throws IOException
{
valid = new int[20];
String inputfile;
  
// Get a file name
  
inputfile = JOptionPane.showInputDialog("Enter Your File Name");
  
File file = new File(inputfile);
Scanner input = new Scanner(file);
int i=0;
while (input.hasNext())
{
// Read a value from the file
  
valid[i] = input.nextInt();
i++;
}
  
// close the file
  
input.close();
  
}
/**
* isValid method
* This method uses a sequential search to
* determine whether the argument appears in
* in the array of valid numbers.
*/

public boolean isValid(int number)
{
boolean found = false; // Flag
int index = 0; // Array index
  
while (!found && index < valid.length)
{
if (valid[index] == number)
found = true;
else
index++;
}
  
return found;
}
}

import javax.swing.JOptionPane;
import java.io.IOException;

public class ValidatorDemo
{
public static void main(String [] arg)
throws IOException
{
String input;
int accountNumber; // Account number to validate
  
Validator val = new Validator ();
  
// Get a Charge account number
  
input = JOptionPane.showInputDialog("Enter your charge account Number: ");
accountNumber=Integer.parseInt(input);
  
// Determine whether it is valid
  
if(val.isValid(accountNumber))
JOptionPane.showMessageDialog(null, "That's a valid account Number.");
else
JOptionPane.showMessageDialog(null, " That's an INVALID account Number.");
System.exit(0);
}
}

Explanation / Answer

The below code replaced JOptionPane with System.out.println();

Also used Scanner class with method next() to read String

// Changed Program

import java.util.Scanner;
import java.io.*;
class Validator
{
//Array of valid numbers
private int[] valid;
public Validator() throws IOException
{
valid = new int[20];
String inputfile;
  
// Get a file name
System.out.println("Enter File Name:");
inputfile = new Scanner(System.in).next();
  
File file = new File(inputfile);
Scanner input = new Scanner(file);
int i=0;
while (input.hasNext())
{
// Read a value from the file
  
valid[i] = input.nextInt();
i++;
}
  
// close the file
  
input.close();
  
}
/**
* isValid method
* This method uses a sequential search to
* determine whether the argument appears in
* in the array of valid numbers.
*/

public boolean isValid(int number)
{
boolean found = false; // Flag
int index = 0; // Array index
  
while (!found && index < valid.length)
{
if (valid[index] == number)
found = true;
else
index++;
}
  
return found;
}
}

public class Sample
{
public static void main(String [] arg)throws IOException
{
String input;
int accountNumber; // Account number to validate
  
Validator val = new Validator ();
  
// Get a Charge account number
System.out.println("Enter your charge account Number: ");
input = new Scanner(System.in).next();
accountNumber=Integer.parseInt(input);
  
// Determine whether it is valid
  
if(val.isValid(accountNumber))
System.out.println("That's a valid account Number.");
else
System.out.println(" That's an INVALID account Number.");
System.exit(0);
}
}

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