If statements not updating?

I am using key listeners to check if the user has the spacebar pressed. If it is pressed, the boolean spaceHeld sets to true, while when the key is released, it is set to false. If statements check to see the booleans value, and then does something with it. The only problem is that the if statements are only checking once, while i need the to check every time that the boolean is changed. My goal is to have a gravity value updated every time that the user presses and releases the spacebar. How can I update the if statements every time the value is changed? Here is my code, help is appreciated.

import java.awt.event.*;
import javax.swing.*;
import java.util.Timer;
import java.util.TimerTask;
import java.util.Calendar;



public class Game implements KeyListener {
    JFrame frame;
    JLabel player;

    boolean grounded = false;
    int velocity = 0;
    int finalY = 0;
    boolean spaceHeld = false;


    Action spaceAction;

    Game() {
         
        frame = new JFrame("Nicholas Seow-Xi Crouse");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(1920, 1080);
        frame.setLayout(null);
        
        frame.setFocusable(true);
        frame.addKeyListener(this);

        player = new JLabel();
        player.setBackground(Color.red);
        player.setBounds(10, 1800, 50, 50);
        player.setOpaque(true);

        frame.add(player);
        frame.setVisible(true);
        
         Timer flightTime = new Timer();
         TimerTask flight = new TimerTask() {
         
            public void run() {
                  if(velocity > -5) {
                  velocity -= 1;
                  }
                  else{
                  velocity = -5;
                  }
                  if (finalY < -61) {
                   finalY = finalY + velocity;
                   }
                   else{
                   finalY = -61;
                   }
                   player.setLocation(player.getX(), player.getY() + finalY);
                   if (player.getY() <= 0){
                   cancel();
                   velocity = 0;
                   finalY = 0;
                   player.setLocation(player.getX(), 0);
                    
                   }  
            }
      };
         

         Timer gravityTime = new Timer();
         TimerTask gravity = new TimerTask() {


            //creates a timer run method that simulates the falling gravity when not grounded
            public void run() {
                if(velocity < 5){
                velocity += 1;
                }
                else{
                velocity = 5;
                }
                //creates the variable the tells where the player is located
                if (finalY < 61) {
                finalY = finalY + velocity;
                }
                else{
                finalY = 61;
                }
                player.setLocation(player.getX(), player.getY() + finalY);
                if (player.getY() >= 1000){
                cancel();
                velocity = 0;
                finalY = 0;
                player.setLocation(player.getX(), 990); 
                }
                
            }
        };

        if (spaceHeld == false ) {
            gravityTime.scheduleAtFixedRate(gravity, 0, 33);
        }
        if (spaceHeld == true ) {
            flightTime.scheduleAtFixedRate(flight, 0 ,33);
    }
}

public void keyTyped(KeyEvent e) {
}

public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_SPACE){
spaceHeld = true;
//debug
System.out.println(spaceHeld);
}
}

public void keyReleased(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_SPACE){
spaceHeld = false;
//debug
System.out.println(spaceHeld);
}
}
}```