I created two classes rect and ball which work fine when executed individually. Later I combined these two classes into a single class called game and added it to the frame. Following this change, I am not getting the output.
public class rect extends JPanel implements KeyListener{//to create a bat
int x=1,y=1;
int xa=1,ya=1;
int max=0,min=0;
public rect(){
addKeyListener(this);
}
public void paintComponent(Graphics g){
super.paintComponent(g);
g.setColor(Color.blue);
g.fillRect(x,440 , 125,20);
}
public void keyPressed(KeyEvent e) {
int c=e.getKeyCode();
if(c==KeyEvent.VK_LEFT){
if(min!=1){
xa=-10;
move();
}
}
if(c==KeyEvent.VK_RIGHT){
if(max!=1){
xa=10;
move();
}
}
}
public void keyReleased(KeyEvent e) {
xa=0;
}
public void keyTyped(KeyEvent e) {
}
public static void main(String c[]){
JFrame f =new JFrame();
f.setSize(800, 500);
f.setVisible(true);
f.setTitle("DX BALL");
f.setResizable(false);
f.setFocusable(false);
**i hav created the class and added but i am uncertain whether that gg object is added to the frame or not because i am getting a blank frame**
game gg=new game();
f.add(gg);
gg.rr.setFocusable(true);
while(true){
gg.repaint();
repaint is not calling its member object repaint function wats wrong
try {
Thread.sleep(15);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void move() {
x=x+xa;
if(x<1||x>664){
if(x>650){
max=1;
min=0;
}
else{
min=1;
max=0;
}
}
else{
max=0;min=0;
}
}
}
class ball extends JPanel{//to create a ball
int x,y;
private int xa=1;
private int ya=1;
public void paintComponent(Graphics g){
super.paintComponent(g);
g.fillOval(x, y,30,30);
}
public void update(Graphics g){
paint(g);
}
void move(){
if (x + xa < 0)
xa = 1;
if (x + xa > 760)
xa = -1;
if (y + ya < 0)
ya = 1;
if (y + ya >420)
ya = -1;
x=x+xa;
y=y+ya;
}
}
class game extends JPanel{//class that has both bat an ball
This is the class where problem arrises. I haev individually checked the ball and rect class it works
rect rr;
ball bb;
game(){
rr=new rect();
bb=new ball();
}
void paintComponent(Graphics g){
super.paintComponent(g);
*i am not getting even a single object being painted*
rr.repaint();
bb.repaint();
bb.move();
}
}