Making my enemies drop bombs in space invaders

Hi all,
I'm in the process of learning flash just now and am
completing an online tutorial on Space Invaders. Thing is, the
bombs drop from a random location on the screen. I want them to
drop from a random enemy (I'm not too bothered just now about
making it one on the bottom row or one with no other enemies before
them).
At the moment, here is the AS that makes them drop (the
frequency is determined elsewhere):
eval("_root.alienBomb" + alienBombNum)._x =random(700);
eval("_root.alienBomb" + alienBombNum)._y =
300*Math.random();
An I can modify it to get a certain one to drop:
eval("_root.alienBomb" + alienBombNum)._x
=_root.alienClip2_2._x;
eval("_root.alienBomb" + alienBombNum)._y =
_root.alienClip2_2._y;
I can' t get it to randomly choose one - I know I have to use
the random function, but don't know how to implement this.
Can anyone help?
regards,
g

The code you're using is really old...back to Flash 5, I'd
guess, which makes this rather more complicated than it need be.
Since you seem to be in AS1, I'll keep it that way. Try
using:
xGridNum = Math.round(Math.random() * 7);
yGridNum = Math.round(Math.random() * 7);
var bomb = _root["alienBomb"+alienBombNum];
var alien = _root["alien"+xGridNum+"_"+yGridNum];
bomb._x = alien._x;
bomb._y = alien._y;
The above isn't the best way to do this, but it's simple and
not far from what you've referenced. The sevens above assume 8 rows
and 8 columns of aliens (numbered alien0_0 to alien7_7).
Hope that helps.

Similar Messages

Help with KeyDown (space invaders game)

I'm making a space invaders type game for school using Greenfoot (new Java IDE). Whenever I press space, a bullet will fire. However, multiple bullets are being created when I press space once, and when I hold space, a long stream of bullets are being made. I want one bullet to be created when I press space. Tried using KeyPress, but apparently Greenfoot does not recognize java.awt? Thanks in advance.
public class Ship extends Vehicle {
     * Constructor for objects of class Shuttle
    public Bullet B;
    boolean canFire = false;
    public Ship() {
        GreenfootImage ship = new GreenfootImage("spaceship.gif");
        this.setImage(ship);
    //Create a bullet
    public void fire(){
        B = new Bullet();
        getWorld().addObject(B,getX(),getY()-60);
    public boolean collision(){
        Actor enemy = getOneIntersectingObject(null);
        return (enemy!=null) ? true : false;
    public void act(){
        // move with keys
        if (this.canMove())
             move();
        if(Greenfoot.isKeyDown("space")){
                fire();
        else if(collision()){
            getWorld().removeObject(this);
}

Make a Class Variable to use as a flag indicating that a key was pressed... check to see if the flag is set, and if it is not, then fire a bullet and then set the flag. Reset the flag when they keyReleased action fires.
This way only one bullet can be fired for each time a key is pressed, provided your act() is being polled, but if a keyPressed fires act(), but not a keyRelease too, then it will not work. If it does not work, then you'll need to go to a regular KeyListener.
//Your code make these changes
public class Ship extends Vehicle {
      * Constructor for objects of class Shuttle
     public Bullet B;
     boolean canFire = false;
     public Ship() {
         GreenfootImage ship = new GreenfootImage("spaceship.gif");
         this.setImage(ship);
     //Create a bullet
     public void fire(){
         B = new Bullet();
         getWorld().addObject(B,getX(),getY()-60);
     public boolean collision(){
         Actor enemy = getOneIntersectingObject(null);
         return (enemy!=null) ? true : false;
     public void act(){
         // move with keys
         if (this.canMove())
              move();
        if(!GreenFoot.isKeyDown("space")) canFire = true; //add this
         if(Greenfoot.isKeyDown("space") and canFire){
                 fire();
                 canFire = false; //add this
         else if(collision()){
             getWorld().removeObject(this);
}

Space invaders! I need some help...!

Hello,
i'm trying to program a very simple version of space invaders. I'm drawing my moving objects (spaceship, rockets, aliens) with drawstring but I'm getting these compiling error: illegal start of expression.
Also I want to move the spaceship with translate is this OK to do so!?
Can somebody help me? Thanks for your help!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.Graphics2D;
//in deze klasse teken ik het ruimteschip en kan het links/rechts bewegen
public class Ruimteschip
     //ruimteschip
     Ruimteschip roderikschip = new Ruimteschip();
     public void paint(Graphics ruimteschip)
{      //Ruimteschip weergeven
     Graphics2D ruimteschip2D = (Graphics2D)ruimteschip;
String ruimteschip = "ruimteschip";
ruimteschip2D.drawString("ruimteschip", x, y,);
     //beweegmethod
     public void beweegRechts()
     {     //teken opnieuw 1 coordinaat rechts
          roderikschip.translate(1, 0);
          ruimteschip2D.drawString("ruimteschip", x, y);
//beweegmethod
     public void beweegLinks()
     {     //teken opnieuw 1 coordinaat links
          roderikschip.translate(-1, 0);
          ruimteschip2D.drawString("ruimteschip", x, y);
}

Hi and thanks for your replies.
I know drawString isn't the most beautiful way, but I'm making this game for an assignment, and I have to use drawString.
Still i'm getting "illegal start of expression" in my paint method...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.Graphics2D;
//in deze klasse teken ik het ruimteschip en kan het links/rechts bewegen
public class Ruimteschip
     //ruimteschip
        Ruimteschip ruimteschip = new Ruimteschip();
     public void paint(Graphics ruimteschip)
    {      //Ruimteschip weergeven
         Graphics2D ruimteschip2D = (Graphics2D)ruimteschip;
        String s = "ruimteschip";
        *ruimteschip2D.drawString(s, x, y,);*
     //beweegmethod
     public void beweegRechts()
     {     //teken opnieuw 1 coordinaat rechts
          s.translate(1, 0);
          ruimteschip.drawString(s, x, y);
    //beweegmethod
     public void beweegLinks()
     {     //teken opnieuw 1 coordinaat links
          s.translate(-1, 0);
          ruimteschip.drawString(s, x, y);
} Edited by: Roddy on May 1, 2008 8:28 AM

How do i remove an Object (aliens/ bullets) from my Space Invaders game??

Creating Space Invaders game and im getting confused on removing objects from my game. How do you actually remove an object (i.e bullets and aliens).
I know this isnt the right way to do it, but for the bullets i had an array of the Objects bullets[] and set the x and y coordinates off screen so u cant see then wen they are painted you cant see them, then wen the player fires them, the x and y coordinates change so they come from the players ship till it hits an alien or goes off screen, then i reset the coordinates so they are pasted off screen again. Im relatively new to this so i would appreciate any help. Im going to have to do the same with aliens wen a collision is detected. Is there a way of actually removing an object?
Here is sum code incase you need to see it:
public void checkCollision()
          Rectangle playerRec = new Rectangle(player1.getBoundingBox());
          for(int i=0; i<alienRow; i++)
               for(int j=0; j<alienCol; j++){
                    if(playerRec.intersects(aliens[i][j].getBoundingBox()))
                         collisionDetected();
                    for(int k=0; k<bulletNum; k++){
                         Rectangle bulletRec = new Rectangle(bullets[k].getBoundingBox());
                         if(bulletRec.intersects(aliens[i][j].getBoundingBox()))
                              removeBullet(bullets[k]);
                              collisionDetected();
     public static void collisionDetected()
          System.out.println("COLLISION");
private void removeBullet(Bullets bullet){
          bullet.fired=false;
          bullet.setX(-10);
          bullet.setY(-10);
     }Edited by: deathwings on Nov 25, 2009 8:20 AM

deathwings wrote:
I was thinking bout that arraylist angle before, but it makes sense now so i think that will work ok. Thx kevin.Not a problem.
Taking the List idea one step further, you could have a parent Object/Interface that all of your game objects extend/implement. Let's call it GameObject.
A GameObject would have a draw(Graphics g) function that you call from your paintComponent( ) method, and for example an act( ) function as well.
You'd have a single List of GameObjects that you add everything in your game into. Now painting is simply a matter of looping over a single List. And in your game logic loop, you could do a similar thing with the act( ) function: your bullet's act( ) would simply move it forward and check for collisions and going off screen. An alien's act( ) function would move it around and maybe shoot a weapon every so often.
Just an idea.

Need Help with Java Space Invaders Game!

Hi, im new to these forums so forgive if i dont follow the right way on laying things out. Im trying to create space invaders game but im stuck when im trying to create multiple aliens/ invaders. I have a class called Aliens (which is the invaders), and i can create an instance of an Alien. But when I try to create multiple instances they are not showing up on screen. I am not getting any error message though (which im hoping is a good sign, lol).
GamePanel is where all the action is and Alien is the alien (invaders) class.
Here is the code:
import java.awt.; import javax.swing.; import java.awt.Image; import java.awt.event.KeyListener; import java.awt.event.KeyEvent;
public class GamePanel extends JComponent implements KeyListener { SpaceInvaders game; static Player player1; Aliens alien1; static public Image spaceship2R; static public Image spaceship2L;
public GamePanel(SpaceInvaders game)
     this.game = game;
     player1 = new Player(this);
     player1.start();
               ///// trying to create multiple instances of aliens here
     for(int i=0; i<4; i++)
          alien1 = new Aliens(this);
          alien1.setX(i*100);
          alien1.start();
    this.setFocusable(true);
    this.addKeyListener(this);
public void paintComponent(Graphics g)
     Image pic1 = player1.getImage();
     Image pic2 = alien1.getImage();
     super.paintComponent(g);
     g.drawImage(pic1, player1.getX(), player1.getY(), 50, 50,this);
     g.drawImage(pic2, alien1.getX(), alien1.getY(), 50, 50,this);
}//end class
import java.awt.Image; import java.awt.*;
class Aliens extends Thread { //variables GamePanel parent; private boolean isRunning; private int xPos = 0, yPos = 0; Thread thread; static char direction = 'r'; Aliens alien; static public Image alien1; static public Image alien2;
public Aliens(GamePanel parent)
     this.parent = parent;
     isRunning = true;
public void run()
     while(isRunning)
          Toolkit kit = Toolkit.getDefaultToolkit();
          alien1 = kit.getImage("alien1.gif");
          alien2 = kit.getImage("alien2.gif");
          try
                  thread.sleep(100);
             catch(InterruptedException e)
                  System.err.println(e);
             updateAliens();
             parent.repaint();
public static Image getImage()
     Image alienImage = alien1;
    switch(direction){
         case('l'):
              alienImage = alien1;
              break;
         case('r'):
              alienImage = alien1;
              break;
    return alienImage;
public void updateAliens()
     if(direction=='r')
          xPos+=20;
          if(xPos >= SpaceInvaders.WIDTH-50||xPos < 0)
               yPos+=50;
               xPos-=20;
               direction='l';
     else
          xPos-=20;
          if(xPos >= SpaceInvaders.WIDTH-50||xPos < 0)
               yPos+=50;
               xPos+=20;
               direction='r';
public void setDirection(char c){ direction = c; }
public void setX(int x){ xPos = x; }
public void setY(int y){ yPos = y; }
public int getX(){ return xPos; }
public int getY(){ return yPos; }
}//end classEdited by: deathwings on Oct 19, 2009 9:47 AM
Edited by: deathwings on Oct 19, 2009 9:53 AM

Maybe the array I have created is not being used in the paint method, or Im working with 2 different objects as you put it? Sorry, Im just learning and I appreciate your time and help. Here is my GamePanel Class and my Aliens class:
import java.awt.*;
import javax.swing.*;
import java.awt.Image;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;
import java.awt.image.BufferStrategy;
public class GamePanel extends JComponent implements KeyListener
     SpaceInvaders game;
     static Player player1;
     static Bullets bullet;
     //static public Image spaceship2R;
     //static public Image spaceship2L;
     private BufferStrategy strategy;
     static int alienNum =0;
     static Aliens[] aliens;
     public GamePanel(SpaceInvaders game)
          this.game = game;
          player1 = new Player(this);
          player1.start();
          Aliens[] aliens = new Aliens[10];
          for(int i=0; i<4; i++)
               aliens[i] = new Aliens(this);
               aliens.setX(i*100);
               aliens[i].start();
               alienNum++;
          initialiseGame();
          this.setFocusable(true);
this.addKeyListener(this);
     public void paintComponent(Graphics g)
          Image pic1 = player1.getImage();
          Image pic2 = aliens[0].getImage();
          Image bulletPic = bullet.getImage();
          super.paintComponent(g);
          g.drawImage(pic1, player1.getX(), player1.getY(), 50, 50,this);
          for ( int i = 0; i < alienNum; i++ )
               g.drawImage(pic1, aliens[0].getX(), aliens[0].getY(), 50, 50,this);
          //if (bullet.fired==true){
          //     g.drawImage(bulletPic, bullet.getX(), bullet.getY(), 20, 20,this);
     public void keyPressed(KeyEvent k)
          switch (k.getKeyCode()) {
          case (KeyEvent.VK_KP_DOWN):
          case (KeyEvent.VK_DOWN):
               player1.setDirection('d');
               break;
          case (KeyEvent.VK_KP_UP):
          case (KeyEvent.VK_UP):
               player1.setDirection('u');
          break;
          case (KeyEvent.VK_KP_RIGHT):
          case (KeyEvent.VK_RIGHT):
               player1.setDirection('r');
          break;
          case (KeyEvent.VK_KP_LEFT):
          case (KeyEvent.VK_LEFT):
               player1.setDirection('l');
          break;
          case (KeyEvent.VK_SPACE):
               fireBullet();
          break;
     public void keyTyped(KeyEvent k) {}//empty
     public void keyReleased(KeyEvent k)
          player1.setDirection('n');
     public void initialiseGame()
     public static void checkCollision()
          Rectangle playerRec = new Rectangle(player1.getBoundingBox());
          for(int i=0; i<alienNum; i++)
               //if(playerRec.intersects(aliens[i].getBoundingBox()))
                    //collisionDetected();
     public static void collisionDetected()
          System.out.println("COLLISION");
     public void fireBullet()
          Bullets bullet = new Bullets(player1.getX(),player1.getY());
          bullet.fired=true;
}//end GamePanelimport java.awt.Image;
import java.awt.*;
class Aliens extends Thread
     //variables
     GamePanel parent;
     private boolean isRunning;
     private int xPos = 0, yPos = 0;
     Thread thread;
     static char direction = 'r';
     Aliens alien;
     static public Image alien1;
     static public Image alien2;
     public Aliens(GamePanel parent)
          this.parent = parent;
          isRunning = true;
     public void run()
          while(isRunning)
               Toolkit kit = Toolkit.getDefaultToolkit();
               alien1 = kit.getImage("alien1.gif");
               //alien2 = kit.getImage("alien2.gif");
               try
          thread.sleep(100);
     catch(InterruptedException e)
          System.err.println(e);
          updateAliens();
          parent.repaint();
     public static Image getImage()
          Image alienImage = alien1;
     switch(direction){
          case('l'):
               alienImage = alien1;
               break;
          case('r'):
               alienImage = alien1;
               break;
     return alienImage;
     public void updateAliens()
          if(direction=='r')
               xPos+=20;
               if(xPos >= SpaceInvaders.WIDTH-50||xPos < 0)
                    yPos+=50;
                    xPos-=20;
                    direction='l';
          else
               xPos-=20;
               if(xPos >= SpaceInvaders.WIDTH-50||xPos < 0)
                    yPos+=50;
                    xPos+=20;
                    direction='r';
     public Rectangle getBoundingBox()
          return new Rectangle((int)xPos, (int)yPos, 50, 50);
     public void setDirection(char c){ direction = c; }
     public void setX(int x){ xPos = x; }
     public void setY(int y){ yPos = y; }
     public int getX(){ return xPos; }
     public int getY(){ return yPos; }
}//end class

Controlling fire in Space Invaders game

Hi again,
still working through the tutorial on Space Invaders in Flash
MX 2004 (bit out of date, I know).
I've got the player craft under mouse control. What I don't
like about the game is that you can fire as rapidly as you wan't,
though the number of bullets is limited. You can change this limit
in the variable - I would rather have it though that you can only
have a set number of bullets in play at a time (at the moment, if
you go over the limit, the uppermost bullets just disapear).
Here is the code:
// when the mouse cliks
onClipEvent(mouseDown)
// duplicate the bullet mc
_root.bullet.duplicateMovieClip("bullet"+bulletNum,bulletNum);
// set the coords to the mouse clik
eval("_root.bullet" + bulletNum)._x = this._x;
eval("_root.bullet" + bulletNum)._y = this._y;
// increment the bullet number
bulletNum++;
// if more than 50 bullets , start again at 0
if(bulletNum>50)
bulletNum = 0;
What code could I use to have it so that you can only have,
say, 3 bullets in play at once, and you can't fire again until
they've hit / left the screen?
regards,
g

Hi again,
thanks for that. Another way would be to use code like the
following:
var enableInterval:Number;
var allowFire:Boolean;
function tempDisableFire():Void {
allowFire = false;
enableInterval = setInterval(enableFire, 500); // 500
millisecond delay
function enableFire():Void {
allowFire = true;
clearInterval(enableInterval);
I am unsure though whether to insert this within my existing
code, or to use this starting from scratch. If it was inside an
onClipEvent tag (the event being the mouse click), I could then use
it to control the fire. I'm not sure if I would do this with an "if
/ then" statement.
Any suggestions on this method? I know it may be asking a bit
much, but if you could even complete this piece of code that would
be magic!
cheers,
g

Firing bullets in space invaders game

hey guys,
I am trying to work out the logic and the code required for firing a bullet in a space invaders style game.
I have a space ship on a stage that moves around freely using the arrow keys and I want to use the space bar to release a bullet.
So far my thinking is as follows:
when the space bar is pressed a bullet is released from the players space ship.
so I need to think about:
- the speed of the bullet
- the position of the spaceship when the bullet is fired
- being able to fire multiple bullets one after the other
- the bullet should move from the bottom of the screen to the top of the screen
- the consequence of a bullet hitting a target
I do not know how many scripts I would need to tackle this? how many behaviours per script and more importantly the code required....
I am desperate for any help and support you can provide...
thank you

thank you for your support
at this current time it would be a waste of time to understand how things work that did not benefit my game, sure knowledge would give me power but at the moment Id rather concentrate on gaining the appropriate knowledge as per the mechanics of my game and not going off in the opposite direction
having had a look at your space invaders game and the code and logic you provided it is different to the game I am building because:
- you use the move for movement and fire whereas I use cursor keys and a space bar
- you have limited the amount of ammuntion, I have not
- there are no explosions or changing of cast members on intersection.
I understand the aim of you posting the guide however I am of the thinking it would be better to follow a tutorial that is in line with what I require rather then learning a particular style and then again having to work out how to amend it again to be used in my game...
So if anyone can help me understand or provide code as per my initial message , I would be so grateful
thank you

Dropping Rollback table space in export dump and use the undo table space

Hi,
I want to upgrade my DB which is on 9.2.0.1.0 to 10.2.0.1.
I have done an export.
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Thank you

Very briefly, these are the steps you will need to perform:
1) Create an UNDO tablespace the same size as the Rollback tablespace, e.g.:
CREATE UNDO TABLESPACE undo
DATAFILE ‘/ora/$ORACLE_SID/001/oradata/$ORACLE_SID/undo_01.dbf’ size 1000M;
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5) Drop the Rollback tablespace including contents and datafiles
Cheers,
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Help! trying to create 'space invaders'

hi. im a high school student with a little knowledge of java. im am currently working on a class assignment where each student has to create their own program. i decided to create the classic game of 'Space Invaders'. But i have a problem; i can't figure out how i will get the characters to move.
does anyone if there is a method that will allow the user to move a character? for example, in C++ there is a conio.h library that has a goto(x,y) function. is there one for java as well? thanks alot!

This is another way
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Si extends JFrame
     Timer ta;
     myView view = new myView();
public Si()
     setBounds(3,10,765,350);
     addWindowListener(new WindowAdapter()
     {     public void windowClosing(WindowEvent ev)
          {     dispose();
               System.exit(0);
     getContentPane().add("Center",view);
     setVisible(true);
     ta = new Timer(45, new ActionListener()
     {     public void actionPerformed(ActionEvent e)
               view.move();
     ta.start();
public class myView extends JComponent
     Point invs[]   = new Point[15];
     Color invc[]   = new Color[15];
     Color color[] = new Color[]{
                    Color.blue,   Color.cyan, Color.green, Color.magenta,
                Color.orange, Color.pink, Color.red,   Color.yellow};
public myView()
     for (int p=0; p < invs.length; p++)
          int x = (int)(Math.random()*600)+33;
          int y = (int)(Math.random()*200)+33;
          invs[p] = new Point(x,y);
          int c = (int)(Math.random()*8);
           invc[p] = color[c];
public void move()
     for (int p=0; p < invs.length; p++)
          repaint(invs[p].x-1,invs[p].y-1,20,18);
          int x = (int)(Math.random()*3)-1;
          int y = (int)(Math.random()*3)-1;
          invs[p].translate(x,y);
          repaint(invs[p].x-1,invs[p].y-1,20,18);
public void paintComponent(Graphics g)
     super.paintComponent(g);
     Graphics2D g2 = (Graphics2D)g;
     g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
     for (int p=0; p < invs.length; p++)
          g.setColor(invc[p]);
          g.fillOval(invs[p].x,invs[p].y,17,13);
public static void main (String[] args)
     new Si();
}      Noah

[FLMX] ayuda con tutorial space invaders

Hola a todos.
estoy tratando de hacer una modificación de un FLA del
space invaders
que me bajé en:
http://www.flashkit.com/movies/Games/Full_Game_Source/Space_In-Paul_Nea-8765/index.php
Este jueguecillo incluye un PHP que guarda los records en
unos txt.
La cuestión es que no tengo mucha idea de
programación y no me funcionan
los records.
¿alguien podria ayudarme?
gracias mil
Juan

Space Invaders.

Hi, could you please try my game Space Invaders, to see if you can find any bugs etc? Let me know...
http://www.geocities.com/ajbasic/SpaceInvaders.html

the ability to die should definitely be the last thing you code ;) It's so cool to play an early staged game without ever being able to die.
OK, so my comments:
The pictures, if you're going to allow them to overlap, as you do now, give them some transparency.
Also, right now, the ships will go all the way to the bottom and through the bottom of the screen.... that's bad.
Anything else I'd think would be immediately obvious. Keep going with it and I hope to see some origional twists that you come up with

Can't drag and drop files between spaces in lion osx

since upgrading to lion osx, i've noticed that i can't drag a pic, for example, from safari and drop it into a chat box in ichat. used to drag pics, web addresses, text, etc across spaces all the time in snow leopard but i don't seem to be able to do it in lion. does anyone else have this problem or am i missing something?

You have many issues with your and your wife's machine(s). Everything you've posted works here. Reinstall Snow Leopard, repair permissions, and see if that fixes things.

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I used to be able to drag a file, let say out of "my documents" and drag it to the upper left hand corner of my desktop, where my spaces would show up, I could then drag it to another space and the screen would flash and jump to that space. When I do this now it does not work, I have restarted and still not working now for a couple of weeks. This was nice to take a mp3 file (for example) and drag it on my external drive which was in another space.
Any answers on this one?? Please email me at [email protected]
Thanks!

It is, that is not the problem. The problem is once I drag a file to the upper left corner and then I see my 8 spaces, I cannot drag the file over the space I want to drop it in to. Before, when I would hover over the space I wanted to drop a file over to, it would make a quick flash and then open that space/window. Now it does not and this is what I want resolved.
Thanks
Casey

Compare time slot in dates while making drag and drop..

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The drag and drop is working fine without conditions, but I have to check the time slots between two dates. If the time of both date are same it should not dropped else it can drag and drop. I use the code below, but not getting executed according to condition.. Please provide suggestion and ideas to get it executed..
declare
l_date_value varchar2(150) := apex_application.g_x01;
l_primary_key_value varchar2(150) := apex_application.g_x02;
l_full_time varchar2(150);
l_time_a varchar2(150);
l_time_b varchar2(150);
begin
select
ltrim(replace(to_char(resv_start_date,'hhmiAM'),'00',' '),'0')||','|| ltrim(replace(to_char(l_date_value ,'hhmiAM'),'00',' '),'0')
into l_full_time
from reservation
where resv_no=l_primary_key_value;
select SUBSTR(l_full_time, 1 ,INSTR(l_full_time, ',', 1, 1)-1) into l_time_a from dual;
select SUBSTR(l_full_time, INSTR(l_full_time,',', 1, 1)+1)into l_time_b from dual;
begin
if l_time_a<> l_time_b then
update reservation set RESV_START_DATE = to_date(l_date_value,'RRRRMMDDHH24MISS') where Resv_no= l_primary_key_value;
end if;
exception when others then
Raise_application_error(-20001,'Error'||SQLERRM);
end;
end;
Thanks..

First 3 .as are the component
source. in the last test.mxml file i have written the drag and drop functionality.
can any help me?? please

Writing a Class for making the 'enemies' follow the 'player'...

Greetings;
I'm an actionscript beginner and trying to write a class to make the 'enemies' follow the 'player' (shown below). I'm trying to write it such that it takes two MovieClips as arguments, and moves the first one toward the second one. When I import the Class try to use it in Main.as by typing " var followPlayer:FollowPlayer = new FollowPlayer(fishMov0, player);", I get the following error:
"ArgumentError: Error #1063: Argument count mismatch on jab.enemy::FollowPlayer/followPlayer(). Expected 2, got 1."
Any ideas/suggestions would be appreciated.
Thanks,
Jeremy
package jab.enemy
    import flash.display.MovieClip;
    import flash.events.Event;
    public class FollowPlayer
        private var _clip1:MovieClip
        private var _clip2:MovieClip
        private var speed:uint = 1.5;
        public function FollowPlayer(clip1:MovieClip, clip2:MovieClip): void
        // clip1 is the enemy, clip2 the player being followed.
            _clip1 = clip1;
            _clip2 = clip2;
            _clip1.stage.addEventListener(Event.ENTER_FRAME, followPlayer);
            _clip2.stage.addEventListener(Event.ENTER_FRAME, followPlayer);
        private function followPlayer(_clip1:MovieClip, _clip2:MovieClip)
                if (_clip1.y > _clip2.y)
                    _clip1.y -= speed;
                if (_clip1.y < _clip2.y)
                    _clip1.y += speed;
                if (_clip1.x > _clip2.x)
                    _clip1.x -= speed;
                if (_clip1.x > _clip2.x)
                    _clip1.x -= speed;

Thanks guys! My code was seriously flawed, but I ended up getting it to work. For anyone else that might be interested, see 'FollowPlayer' below, an extremely simple class which takes two MovieClips as arguments, and moves the first one slowly (at 24fps) toward the second one:
package jab.enemy
    import flash.display.MovieClip;
    import flash.events.Event;
    public class FollowPlayer
        private var _clip1:MovieClip
        private var _clip2:MovieClip
        private var speed = 1 + Math.random();
        public function FollowPlayer(clip1:MovieClip, clip2:MovieClip): void
        // clip1 is the enemy, clip2 the player being followed.
            _clip1 = clip1;
            _clip2 = clip2;
            _clip1.stage.addEventListener(Event.ENTER_FRAME, onEnterFrame)
            function onEnterFrame(event:Event):void
                if (_clip1.y > _clip2.y)
                    _clip1.y -= speed;
                if (_clip1.y < _clip2.y)
                    _clip1.y += speed;
                if (_clip1.x > _clip2.x)
                    _clip1.x -= speed;
                if (_clip1.x < _clip2.x)
                    _clip1.x += speed;

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