Thread: Mario Type Game Code, Gravity Does not work, error is in "jumping" method

//imports following packages from java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Image.*;
//extends the JFrame and allows the program to listen to keyboard input
public class RectangleandMovement extends JFrame implements KeyListener{
//creates an array of rectangles for the character
//jump counter
int jc=10;
Rectangle imageAr[];
//rectangles for bounds of player and fireball
Rectangle playerHitbox,fireballHitbox;
//Rectangle rect1;
//creates a true/false value to check if the rectangle is being intersected
boolean intersectChecker = false;
//boolean variables for keyboard input
boolean up,left,right,shoot,shotTaken = false;
//creates an array for the running images
Image runPics[],shootPics[];
//creates images relating to the character
Image background1,background2,idle,run,jump,jump1,fireba ll;
//private variables so they are only visible in this class
private Image dbOffScreen;
private Graphics dbGraphics;
//sets counter as an int,used to switch between the different images
int counter,counter2;
//creakes xposition for background
int backgroundXpos;
//sets and initiallizes player x and y positions
int playerXpos, playerYpos;
int fireballXpos, fireballYpos;
//ENEMY VARIABLES//
//creates images for the enemy
Image skeleton[],skeletonIdle;
//creates variables for x and y position of the skeleton
int skeletonXpos, skeletonYpos;
//creates a rectangle around the skeleton
Rectangle skeletonHitbox;
//constructor
public RectangleandMovement(){
super("");
//sets the title
setTitle("Mage Runner");
//once again sets the value of the x and y coordinates
playerXpos = 50;
playerYpos = 250;

//creates 8 rectangles for the run animation
imageAr = new Rectangle [8];
//creats 8 images for run animation
runPics = new Image [8];
shootPics = new Image [8];
//sets the background to an image
background1 = new ImageIcon("mrss.png").getImage();
background2 = new ImageIcon("mrss1.png").getImage();
//sets the image for the idle picture
idle = new ImageIcon("idle1.png").getImage();
//this is the initial picture, where run is equal to the idle picture
run = idle;
fireball = new ImageIcon("fireball1.png").getImage();
playerHitbox = new Rectangle();
playerHitbox.setSize(75,100);
//creates a loop for the run animation so the array can hold the 8 pictures
for (int i=0; i < imageAr.length;i++){
// int h,w;
// h = runPics[i].getHeight();
// w = runPics[i].getWidth();
imageAr[i] = new Rectangle(50,250,80,100);
runPics[i] = new ImageIcon("run"+i+".png").getImage();
shootPics[i] = new ImageIcon("attack"+i+"png").getImage();
}
//sizes the array of the skeleton image
skeleton = new Image [6];
//creates loop to add skeleton images
for (int i = 0; i < skeleton.length; i++){
skeleton[i] = new ImageIcon("skeleRun" + i + ".png").getImage();
}
skeletonIdle = new ImageIcon("skeleIdle1.png").getImage();
skeletonXpos = 300;
skeletonYpos = 250;
skeletonHitbox = new Rectangle();
skeletonHitbox.setSize(58,100);
//checks for intersection (will be implemented later)
intersectChecker = false;
//adds key listener
addKeyListener(this);
//sets screen size
setSize(700,400);

//sets visible to true
setVisible(true);
}



//double buffered to reduce lag
public void paint(Graphics g){
dbOffScreen = createImage(700,400);
dbGraphics = dbOffScreen.getGraphics();
paintComponent(dbGraphics);
g.drawImage(dbOffScreen,0,0,this);
}



//this method paints the images on the jframe
public void paintComponent(Graphics g){
super.paint(g);
//calls graphics 2d
Graphics2D g2D = (Graphics2D)g;
//rectangle for character
playerHitbox.setLocation(playerXpos,playerYpos);
skeletonHitbox.setLocation(skeletonXpos,skeletonYp os);

//draws the background and moves it backwords as the player moves forward
backgroundXpos = 50-playerXpos;
g2D.drawImage(background1,backgroundXpos,0,null);
g2D.drawImage(background2,600-playerXpos,0,null);
//draws characters
g2D.drawImage(run,playerXpos,playerYpos,null);
if (shotTaken){
g2D.drawImage(fireball, fireballXpos, fireballYpos, null);
}
g2D.drawImage(skeletonIdle, skeletonXpos, skeletonYpos, null);
if (intersectChecker == true){
System.out.println("BOOM");
}
//repaints
repaint();
}


public boolean checkCollision(){
if(playerHitbox.intersects(skeletonHitbox)){
intersectChecker = true;
}
return intersectChecker;
}



public static void main(String[] args) {
new Main();
}



//this method recieves boolean variables and then changes the x and y coordinates accordingly and is supposed to create animations based on user input
public void run(){
//if user presses right arrow the following code executes
if (right == true){
for (int i = 0; i<8; i++){
run = new ImageIcon("run" + counter + ".png").getImage();
if (counter2 == 50){
counter++;
counter2 = 0;
}
counter2++;
if (counter == 8){
counter = 1;
}
}
}
if (left == true){
for (int i = 0; i<8; i++){
run = new ImageIcon("Lrun" + counter + ".png").getImage();
if (counter2 == 50){
counter++;
counter2 = 0;
}
counter2++;
if (counter == 8){
counter = 1;
}
}
}
if (playerXpos<20){
playerXpos = playerXpos + 5;
}
if(playerXpos>650){
playerXpos = playerXpos -5;
}
if (left == true){
playerXpos = playerXpos - 2;
}
if (right == true){
playerXpos = playerXpos + 2;
}
if (up == true){

}
/*
boolean posY = false;
if (right = true){
jump = new ImageIcon("jump1.png").getImage();
run = jump;
///when up is true//
for (int i=0;i<16;i++){
playerYpos -= (int)(5+ (-0.3 *i));
if (playerYpos > 250){
posY = true;
up=false;
}
}

}

if (posY == true){
while ((playerYpos != 250) && (up =! true)){
playerYpos +=1;
}
}
*/
// if (left = true){
// jump1 = new ImageIcon("jump2.png").getImage();
// run = jump1;
// }
repaint();

}
//if (down == true){
// playerYpos = playerYpos + 10;
//}




public void jumping(){
boolean posY = false;
if (up = true){
jump = new ImageIcon("jump1.png").getImage();
run = jump;
///when up is true//

if (jc>-10){
for (int i=0;i<20;i++){
playerYpos += (int)((jc *Math.abs(jc))*-0.5);
jc= jc - 1;//(int)(-5);//+ (0.3 *i));
repaint();
try{
Thread.sleep(10);
}
catch(InterruptedException ex){
Thread.currentThread().interrupt();
}
}
if (playerYpos > 350){
posY = true;
up=false;
}

if (posY == true){
while ((playerYpos != 350) && (up =! true)){
playerYpos -=1;
}
}
//repaint();
}
}
}




public void shootFire(){
if (shoot == true){

for (int i = 0; i<400; i++){
run = new ImageIcon("attack" + counter + ".png").getImage();
if (counter2 == 50){
counter++;
counter2 = 0;
}
counter2++;
if (counter == 8){
counter = 1;
}
}
}
if (shotTaken){
for (int i = 0; i < 50; i++){
fireballXpos=fireballXpos + 1 ;
repaint();
}
}
repaint();
}



public void keyPressed(KeyEvent ke){
if (ke.getKeyCode()==KeyEvent.VK_LEFT){
left = true;
}
if (ke.getKeyCode()==KeyEvent.VK_UP){
up = true;
jumping();
}
if (ke.getKeyCode()==KeyEvent.VK_RIGHT){
right = true;
}
if (ke.getKeyCode()==KeyEvent.VK_SHIFT){
if (fireballHitbox == null){
shoot = true;
if (shoot){
fireballXpos = (playerXpos + 75);
fireballYpos = (playerYpos + 20);
fireballHitbox = new Rectangle(fireballXpos, fireballYpos, 48,27);
shotTaken = true;
}
}
shootFire();
if(checkCollision()){
intersectChecker = true;
}
}

run();
}



public void keyReleased(KeyEvent ke){
if (ke.getKeyCode()==KeyEvent.VK_LEFT){
left = false;
run = idle;
}
if (ke.getKeyCode()==KeyEvent.VK_UP){
up = false;

}
if (ke.getKeyCode()==KeyEvent.VK_RIGHT){
right = false;
run = idle;
}
if (ke.getKeyCode()==KeyEvent.VK_SHIFT){
shoot = false;
if (fireballXpos >= 60){
fireballHitbox = new Rectangle(0,0,0,0);
shotTaken = false;
shoot = true;
repaint();
}
}
}



public void keyTyped(KeyEvent ke){
}

}