Errors While Using WriteFile

Question

I am programming a pong game. The following code below:

import javax.swing.*;
import java.awt.event.*;
import java.io.FileWriter;
public class Launcher {
    public static void main(String[] args) {
        JFrame f = new JFrame("Title");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.addKeyListener(new KeyListener() {
            @Override
            public void keyTyped(KeyEvent e) {
                
            }
            @Override
            public void keyPressed(KeyEvent e) {
                FileWriter file = new FileWriter("io.txt");
                if(e.getKeyChar() == 's') {
                    file.write("s");
                }
                if(e.getKeyChar() == 'w') {
                    file.write("w");
                }
                file.close();
            }
            @Override
            public void keyReleased(KeyEvent e) {
                FileWriter file = new FileWriter("io.txt");
                if(e.getKeyChar() == 's') {
                    file.write("");
                }
                if(e.getKeyChar() == 'w') {
                    file.write("");
                }
                file.close();
            }
        });
        PongGame mainframe = new PongGame();
        f.add(mainframe);
        f.setSize(500,500);
        f.setVisible(true);
    }
}

gives me multiple errors:

Launcher.java:15: error: unreported exception IOException; must be caught or declared to be thrown
                FileWriter file = new FileWriter("io.txt");
                                  ^
Launcher.java:17: error: unreported exception IOException; must be caught or declared to be thrown
                    file.write("s");
                              ^
Launcher.java:20: error: unreported exception IOException; must be caught or declared to be thrown
                    file.write("w");
                              ^
Launcher.java:22: error: unreported exception IOException; must be caught or declared to be thrown
                file.close();
                          ^
Launcher.java:26: error: unreported exception IOException; must be caught or declared to be thrown
                FileWriter file = new FileWriter("io.txt");
                                  ^
Launcher.java:28: error: unreported exception IOException; must be caught or declared to be thrown
                    file.write("");
                              ^
Launcher.java:31: error: unreported exception IOException; must be caught or declared to be thrown
                    file.write("");
                              ^
Launcher.java:33: error: unreported exception IOException; must be caught or declared to be thrown
                file.close();
                          ^
8 errors

I want to be able to write to the file. I don't know what the problem could possibly be. I have tried defining the file variable outside of the main method and defining it inside of each if statement. Any help is appreciated. Thanks!