Syntax error on tokens, Resources expected insteadJava(1610612973)

trying to use Integer.parseInt() for a class project but for some reason it just isnt working and comes up with Syntax error on tokens, Resources expected insteadJava(1610612973)

Integer issue is at the top in checkInt() boolean

 import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.Integer;

public class RentalApp{

    public static boolean checkInt(String s)
    {
        try(Integer.parseInt(s))
        {

        }
        catch (Exception e)
        {

        }
    }
    public static void main(String[] args)
    {
        final int WINDOW_WIDTH = 700;
        final int WINDOW_HEIGHT = 450;
        
        // Create JFrame Window
        JFrame window = new JFrame();
        window.setTitle("Vehicle Rental System");
        window.setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Create and add text
        JLabel text = new JLabel("Select Vehicle Type:");
        window.add(text);

        // Create and add dropdown menu
        String[] choices = {"Car", "Truck", "Bike"};
        final JComboBox c1 = new JComboBox(choices);
        c1.setPreferredSize(new Dimension (80, 25));
        window.add(c1);

        // Create and add more text
        JLabel text2 = new JLabel("Enter Number of Rental Days:");
        window.add(text2);

        // Create and add text field
        final JTextField dayInput = new JTextField(5);
        window.add(dayInput);

        // Create and add button
        JButton button = new JButton("Calculate Rent");
        window.add(button);
        button.addActionListener(new ActionListener() { 
            public void actionPerformed(ActionEvent e) { 
                switch (new String((String) c1.getSelectedItem())){
                    case ("Car"):
                        //car code
                        break;
                    case ("Truck"):
                        //truck code
                        break;
                    case ("Bike"):
                        //bike code
                        break;
                }
            } 
          });

        window.setLayout(new FlowLayout());
        window.setVisible(true);


    }
}

I tried importing java.lang.Integer but that doesn't help, this is all of the code, not finished obviously