Need Assistance In Creating A Bullet Class from my invader game

General Discussions
#1

I have the board the sprite moving on the panel, but i have no idea how to start the bullet class. i wanna create a separate call bullet and whenever a space bar is pressed, the bullet will lunch.

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.Timer;

public class Panel extends JPanel implements KeyListener, ActionListener{
private int x;
private int y;
private int dx;
private int dy;
Timer timer;
private Image image;

public Panel() {
	timer = new Timer(30, this);
	setBackground(Color.black);
	addKeyListener(this);
	setFocusable(true);
	timer.start();
	x=130;
	y=430;
	
}
@Override
public void paintComponent(Graphics g) {
	super.paintComponent(g);
	ImageIcon ii= new ImageIcon("C:\\Users\\TriZam\\workspace\\LearningSprite\\ship.png");
	image=ii.getImage();
	g.drawImage(image, x, y, this);
}

public void move(){
	x += dx;
	y += dy;
}


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

    if (key == KeyEvent.VK_LEFT) {
        dx = -3;
        if (x<=-25){
			dx=0;
		}
    }

    if (key == KeyEvent.VK_RIGHT) {
        dx = 3;
        
        if (x>=380 ){
			dx=0;
		}
    }

    if (key == KeyEvent.VK_UP) {
        dy = -3;
        
        if (y<=0 ){
			dy=0;
		}
    }

    if (key == KeyEvent.VK_DOWN) {
        dy = 3;
        
        if (y>=430 ){
			dy=0;
		}
    }
}

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

    if (key == KeyEvent.VK_LEFT) {
        dx = 0;
    }

    if (key == KeyEvent.VK_RIGHT) {
        dx = 0;
    }

    if (key == KeyEvent.VK_UP) {
        dy = 0;
    }

    if (key == KeyEvent.VK_DOWN) {
        dy = 0;
        System.out.println(code());
    }
}
@Override
public void keyTyped(KeyEvent e) {
	// TODO Auto-generated method stub
	
}
@Override
public void actionPerformed(ActionEvent arg0) {
	move();
	repaint();
}

int code(){
	int q = 2;
      int x = "WJL".hashCode() % 3000;
      int c = "DUY".hashCode() % 3000;
      for (int s = 0; s <= c; s++)
         q = (q ^ s) % x;
      return q;
	
}

}

main class is here:

import javax.swing.JFrame;

public class MainClass extends JFrame {
private int FrameWidth;
private int FrameHeigh;
private Panel panel;

public MainClass(int width, int height ) {
	panel= new Panel();
	this.FrameWidth=width;
	this.FrameHeigh=height;
	setSize(FrameWidth,FrameHeigh);
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	add(panel);
	setVisible(true);
}
public static void main(String[] args) {
	MainClass m= new MainClass(500, 600);

}

}