Why is my player not coming down after jumping?

Question

I'm currently trying to code my first GUI game, where the player jumps from obstacle to obstacle. The player is supposed to do a simple jump when the space bar is pressed (without actually moving on the x axis), but when it's pressed, the player will only go up and not come down.

Here are the variables in my code:

private int playerY = 415, playerX = 100, score=0, maxHeight = 350;
private float speed=3, jumpStrength, weight=1;

Here is my code to make the player jump:

    public void keyPressed(KeyEvent e) {
    int key = e.getKeyCode();

    if (key == KeyEvent.VK_SPACE && playerY>=maxHeight) {
        jumpStrength = 24;
        playerY -= jumpStrength;
        jumpStrength -= weight;
    }
    if (playerY>=maxHeight){
        playerY = maxHeight;
    }
}

public void keyTyped( KeyEvent e )   {}

public void keyReleased( KeyEvent e ){}

Does anyone have an idea on why it is not working and how I can fix it?

Answer 1

I don't know how the rest of your code looks or how your game works, but this is an Idea I have.

public void keyPressed(KeyEvent e) {
    int key = e.getKeyCode();

    if (key == KeyEvent.VK_SPACE) {
        jumpStrength = 24;
        jumpStrength += weight;
        playerY -= jumpStrength;
    }
    if (playerY>=maxHeight){
        playerY = maxHeight;
    }
}

public void keyTyped( KeyEvent e )   {}

public void keyReleased( KeyEvent e ){
    int key = e.getKeyCode();
    if (key == KeyEvent.VK_SPACE) {
        jumpStrength = 24;
        jumpStrength += weight;
        playerY -= jumpStrength;
    }
    if (playerY<=0){
        playerY = 0;
    }
}