sudde gameeef

int x = r.nextInt(300); if(x > 0 && x < 100) System.out.println("random 1"); else if(x > 100 && x < 200) System.out.println("random 2"); else if(x > 200 && x < 300) System.out.println("random 3");

i am not sure if this is the right way.


int x = r.nextInt(2); if(x == 0) System.out.println("random 1"); else if(x == 1) System.out.println("random 2"); else if(x == 2) System.out.println("random 3");

i am making a game where i need to create object only onces randomly. <br/>
i can get random number by random object. but not sure how to put in if statment. <br/>





if()
System.out.println("random 1");
else if()
System.out.println("random 2");
else if()
System.out.println("random 3");

thanks. i almost got it to working. just one problem its print tree is always empty in if system. i am not sure why.

and by local vairbales you be change it to public right? than it will be local.

getting a error:
Exception in thread "main" java.lang.StackOverflowError
at D06_Binary_Tree$node.access$3(D06_Binary_Tree.java:22)
at D06_Binary_Tree.inOrderTraversal(D06_Binary_Tree.java:116)

andy idea how can i fix this problem?



public class D06_Binary_Tree { /*** CREATE NODE ***/ private class node { private String name; private int age; private node left_child; private node right_child; /*** Constructor ***/ public node() { name = ""; age = 07; left_child = null; right_child = null; } public node(String n, int a) { name = n; age = a; left_child = null; right_child = null; }/*** End of constructor ***/ }/*** End of Node class ***/ /*** Linked List Constructor ***/ private node root_node; private node current_node; private node parent_node; private node new_node; public D06_Binary_Tree() { // TODO Auto-generated constructor stub } /*** Insert Method ***/ public void insert(String n, int a) { current_node = root_node; parent_node = root_node; if(root_node == null) //if root is empty { root_node = new node(n, a); root_node.left_child = null; root_node.right_child = null; } else { while(true) { parent_node = current_node; //follow current_node in loop if(current_node.age > a) //LEFT HAND SIDE { current_node = current_node.left_child; //move current node if(current_node == null) //if empty { new_node = new node(n, a); //create new node parent_node.left_child = new_node; //parent is same as current cude break; } } else /*** RIGHT SIDE OF TREE ***/ { current_node = current_node.right_child; if(current_node == null) { new_node = new node(n, a); parent_node.right_child = new_node; break; } } } } }/*** End of Insert Method ***/ /*** IN ORDER TRAVERSAL METHOD ***/ //in order traversal - print all value lowest to heightest public void inOrderTraversal(node current_node) { current_node = root_node; if(current_node == null) { System.out.println("Binary Tree is empty!"); } else { inOrderTraversal(current_node.left_child); System.out.println(current_node); inOrderTraversal(current_node.right_child); } }/*** END OF IN ORDER TRAVERSAL METHOD ***/ /*** Main Method ***/ public static void main(String[] args) { D06_Binary_Tree m = new D06_Binary_Tree(); m.insert("a", 50); m.insert("b", 25); m.insert("c", 15); m.insert("d", 30); m.insert("5", 75); m.insert("4", 85); m.inOrderTraversal(m.current_node); } }

yeah.... that isnt working. so i want to try some thing else.


1st check for collision
if(this.getBounds_ball().intersects(this.getBounds_rect()))

now in side that if statment i can get the over laping x and y. so i know where did the ball collision

xOverlap = getBounds_ball().getX() - getBounds_rect().getX(); yOverlap = getBounds_ball().getY() - getBounds_rect().getY();

now any idea how can i use this information to test where did the ball collide from??

i was test collision between ball and box. i have a ball and long rect(platform) on screen. the collision part works fine. but i want to test where the ball is touch the platform. so if ball touch the ball from left or right or top or bottom. but when i run this. but it is not seem to be going in any of the inner if statments.

x = ball x y = ball y radius = ball width and height rx = rect x ry = rect y rheight = rect height rwidth = rect width main game loop: x += dx; //keep the ball moving so i can test the collision y += dy; //collsion between ball and box if(x+radius > rx && x < rx+rwidth) { if(y+radius > ry && y < ry+rheight) { if(y+radius == ry) { System.out.println("top"); } else if(y == ry+rheight) { System.out.println("bottom"); } else if(x+radius == rx) { System.out.println("left"); } else if(x == rx+rwidth) { System.out.println("right"); } } }

i had a question but i am not sure what the problem is.
if user keep right key down. than camera should move left.and my player should fall down bc there are two empty(sky,'0') under player.

move camera.
2d map: (0=sky,1=ground,2=player) 0,0,0,0,0,0,0,0,0 0,0,0,0,0,0,0,0,0 2,0,0,1,0,0,0,0,0 1,1,0,0,1,0,1,1,1 int camera_pos_x = 0; int camera_pos_y = 0; int camera_speed = 4; int tile_size = 32; //width and height same if(left) //if user press left key { camera_pos_x += camera_speed; } if(right) { camera_pos_x -= camera_speed; }

now to move level iam doing doing this in paint method in level class.
for (...) { for (...) { if (map01[y][x] == 1) { g.fillRect(x * tile_size - camera_pos_x, y * tile_size - camera_pos_y, tile_size, tile_size);
above code will move the bottom floor when user moves left and right.


than i am setting a collision box around every where i see '1'(ground)
for(int y = 0; y < map01.length; y++){ for(int x = 0; x < map01[y].length; x++){ if(map01[y][x] == 1){ rect.add(new Rectangle(x*tile_size-camera_pos_x, y*tile_size, tile_size, tile_size));


not to check for collision i am doing:
for(int i = 0; i < rect.size(); i++){ if(p.getBounds().intersects(this.rect.get(i))){ System.out.println(this.rect.get(i)); on_ground = p.getY() - 4; //- speed i dont know why p.setY(on_ground); p.setJUMP(false); p.setFall(false);

if i print the this.rect.get(i) in if statment: i get
java.awt.Rectangle[x=0,y=20,width=5,height=5]

now if i move to right block: output is
java.awt.Rectangle[x=0,y=20,width=5,height=5]

should that be?
java.awt.Rectangle[x=5,y=20,width=5,height=5]


also my player jump method:

int x,dx,width,height; double dy = 6.0; //chage in y over time double gravity = 0.3; //0.2 pull down when jump int fall_speed = 4; boolean fall = true; //start the game player falling boolean jump = false; //start the game player not jumping if(up && !fall && !jump)//player has to be on ground { jump = true; fall = false; dy = 6.0; //reset } if(jump) //safe to jump. player is on ground and not falling. { dy -= gravity; //move player up y -= dy; if(y + height == og) //if on ground. so stop the jump { jump = false; fall = false; } } else if(!jump) //player is falling { fall = true; y += fall_speed; //player falling speed }

i just change some of the stuff.

tile_size = 32;

this code justt making a rectange where there is ground and storeing in arraylist
ArrayList<Rectangle> rect = new ...; public void store() { for(int y = 0; y < map01.length; y++) { for(int x = 0; x < map01[y].length; x++) { if(map01[y][x] == 1) { rect.add(new Rectangle( x*tile_size, y*tile_size, tile_size, tile_size)); } } } }

getter
public ArrayList<Rectangle> getRect(){ return rect; }


this code loop though arraylist and see is player is touching the rectanges in arraylist.
//p = player class for(int i = 0; i < rect.size(); i++) { if(p.getBounds().intersects(this.getRect().get(i))) //this will tell me if player is collision with map where there is '2' { on_ground = p.getY() + p.getHEIGHT(); //if player is touching the ground than set on_ground postion to player //y + player height. and that will give me ground postion } }


this code will find the ground no matter where is the player. bc i getting player y postion.

but the problem is that 1st player will be touch the ground(1) so it will get player y postion + height and thats the ground postion. if he moves right than there is another ground block on top. so he touchs that and moves the ground up. and so on...

now notic if player moves left than he is no ground under him and he is not touching any ground blocks. so he should fall down untill he touch another block. but this doesnt happed. he just stays there and no ground block under him.

i tried this but didnt worked i dont know why.

if(p.getBounds().intersects(this.getRect().get(i))) //touching ground so move up { on_ground = p.getY() + p.getHEIGHT(); } elset //not touching ground so move down { on_ground = p.getY() - p.getHEIGHT(); } it always goes in both if and else. i dont now why

how to get ground postion, no matter where your player is standing.

2d array: (0=sky, 1=ground, 2=player)

0001 2011 1111

so to get ground position i do this.

int map_height = a.length * tile_size; int on_ground = map_height - tile_size;

problem with above code is that it will only get me the last row postion and thats the ground postion. it wont take in count the ground above it.

so i did this in a loop. i am not sure what to do in if statment so it will give me ground postion, no matter where is player is standing.

for(int y = 0; y < a.length; y++) { for(int x = 0; x < a[y].length; x++) { if(a[y][x] == 1) { on_ground = map_height - (tile_size * ) } } } }

how do i move to another form? do i just post it again?

i was trying to make animation using sprite but i ran in to a problem. i want to make animation if user hit right key and different animation if user hit left key. and different animation if user hit up key etc....

the problem is that righ tnow this code below only makes one animation. in player class i want change code lil bit so i can create different animation.

this way this code works is that in player class i have arraylist which stores different images. than i can call animation class to create animation.


public class player { private int x; //current x private int y; //current y private int width = 32; private int height = 92; ArrayList<BufferedImage> player_walk_right_sprites = new ArrayList<BufferedImage>(); //store images for animation ArrayList<BufferedImage> player_stand_right_sprites = new ArrayList<BufferedImage>(); //store images for animation animation animation_class; //to start animation public player(int ix, int iy, int iwidth, int iheight, main m) { x = ix; y = iy; width = iwidth; height = iheight; /*** create 1st animation ***/ sprite_sheet ss = new sprite_sheet(m.getSpriteSheet()); player_walk_right_sprites.add(ss.grabSprite(6, 530, 34, 44)); //create animation - x, y, width, height of cut image player_walk_right_sprites.add(ss.grabSprite(47, 530, 34, 44)); //create animation - x, y, width, height of cut image player_walk_right_sprites.add(ss.grabSprite(88, 530, 36, 44)); player_walk_right_sprites.add(ss.grabSprite(130, 530, 34, 44)); player_walk_right_sprites.add(ss.grabSprite(167, 530, 34, 44)); player_walk_right_sprites.add(ss.grabSprite(204, 530, 34, 44)); player_walk_right_sprites.add(ss.grabSprite(246, 530, 34, 44)); player_walk_right_sprites.add(ss.grabSprite(288, 530, 35, 44)); player_walk_right_sprites.add(ss.grabSprite(328, 530, 39, 44)); player_walk_right_sprites.add(ss.grabSprite(374, 530, 35, 44)); player_walk_right_sprites.add(ss.grabSprite(414, 530, 35, 44)); player_walk_right_sprites.add(ss.grabSprite(453, 530, 35, 44)); //create 2nd animation player_stand_right_sprites.add(ss.grabSprite(228, 7, 32, 39)); player_stand_right_sprites.add(ss.grabSprite(268, 7, 32, 39)); player_stand_right_sprites.add(ss.grabSprite(309, 7, 32, 39)); player_stand_right_sprites.add(ss.grabSprite(349, 7, 32, 39)); //animation animation_class = new animation(player_walk_right_sprites); animation_class.setSPEED(150); animation_class.play(); } //########################################################################################################### public void PLAYER_KEYS(main m, levels level_class) { ... //-----------update animation if(animation_class != null) { animation_class.update(System.currentTimeMillis()); } } //########################################################################################################### public void paint(Graphics g, main m) { if(right == true) //walk right animation { g.drawImage(animation_class.sprite, x, y, width, height, null); } else if(stand == true) //stand animation { }




animatin.java
public class animation { private ArrayList<BufferedImage> frames; public BufferedImage sprite; private volatile boolean running = false; private long previous_time; private int current_frame; private long speed; private int frame_pause; public animation(ArrayList<BufferedImage> iframes) { this.frames = iframes; } public void setSPEED(long value) { this.speed = value; } //crete animation public void update(long time) { if(running) { if(time - previous_time >= speed) { //update the animation current_frame++; //go to next frame try { sprite = frames.get(current_frame); //set the sprite to current frame } catch(IndexOutOfBoundsException e) //if sprite cant go to next frame { current_frame = 0; //reset current frame sprite = frames.get(current_frame); //set sprite to that current frame } previous_time = time; //allow to loop } }//end of while loop } public void play() { running = true; previous_time = 0; frame_pause = 0; current_frame = 0; } public void stop() { running = false; previous_time = 0; frame_pause = 0; current_frame = 0; } public void pause() { frame_pause = current_frame; running = false; } public void resume() { current_frame = frame_pause; running = true; } }

i create a player and i want him to shoot bullet. i understand the logic but i need some help with it. my bullet will just be rect in paint method.

logic:
create bullet class
store in arraylist
print in paint method

in bullet class i set the variables:
Bullet.java
x //x postion y //y postion width //width of bullet height = 10; //height of bullet dx = 5; //speed of bullet boolean hitSpace = false; //if user hit space buttom boolean visable = false; //cant see the bullet int bullet_limit = 50; //set bullet limit. so after 50 no more bullets int bullet_range = 200; //how far can bullet go private ArrayList<Bullet> store_bullets = new ArrayList<Bullet>(); //store bullets


//if user hit space bar than set variables (calling this method in key method in main.) public void hitSPACE() { hitSpace = true; dead = false; } public void MOVE() { if(hitSpace == true) //if user hit space bar { Bullet b = new shoot(x, y); //create bullet store_bullets.add(b); //store in arraylist x+= dx; //change speed if(x > bullet_range) //if it goes above range than dont viable { visable = false; //cant see the bullet } } } //draw bullets from arraylist public void paint(Graphics g) { if(visable == true) //if its visable { for(int w = 0; w < store_bullets.size(); w++) // print from array list { g.fillRect(x, y, width, height); } } }//end of paint method





this is the code where i need help. how to print bullets from arraylist.
for(int w = 0; w < store_bullets.size(); w++) // print from array list { g.fillRect(x, y, width, height); }

sudde gameeef wrote:i remove the 1 also in main i have Player p lower case.
and two line were

player_class.paint(g, this);
and

public void paint(Graphics g, main m)

also in main i have Player p lower case.
and two line were

player_class.paint(g, this);
and

public void paint(Graphics g, main m)

i c. this seem to be working now but if i paint in different class than it doesnt work. for ex. below player_class paint doesnt work. any idea?

error on: player_class.paintComponent(g);


public class mainextends JApplet { Timer timer; Display display_class; Player player_class; /*** init method ***/ public void init() { setSize(800, 400); display_class = new Display(); setContentPane(display_class); }/*** end of init method ***/ /*** stat method ***/ public void start() { timer = new Timer(30, this); timer.start(); }/*** end of start method ***/ /*** game loop ***/ public void actionPerformed(ActionEvent e) { repaint(); }/*** end of run method ***/ /*** paint method ***/ public class Display extends JPanel { public void paintComponent(Graphics g) { super.paintComponent(g); player_class.paint(g); //draw from different class }/** end of paint component method ***/ }/*** end of display class ***/ }/*** end of main class ***/


player.java
public class player { /*** PLAYER VARIABLES ***/ private int x = 10; private int y = 200; private int width = 15; private int height = 100; /*** CONSTRUCTOR METHOD ***/ public player1() { } public void paint(Graphics g) { g.setColor(Color.red); g.fillRect(x, y, width, height); } }


error:
The method paint(Graphics, main) in the type main_menu is not applicable for the arguments (Graphics, main.Display)