10 replies to this topic

[johnmcgrady]

am new to java we just started it about a month ago in our oracle class. our instructor gave us a tetris game to do and i guess he must have printed it wrong because i keep getting this error.

symbol : method moveLines (int)
moveLines(y);
^
.. i have no idea what i have done wrong.. i have looked over this 6 page assignment and everything he has i have typed in correctly. if anyone knows anything would greatly appreciate it. thanks

here is more of the project if this helps

public void checkLines(){
int y=15;
boolean filled;
while(y>1){
filled=true;
for(int x=1;x<16;x++)
if(gameboard[x][y]==0) {filled=false;break;}
if(filled)
moveLines(y);
else
y--;}
}

[jeef]

do you have moveLines() defined in the same class?

[johnmcgrady]

do you have moveLines() defined in the same class?

symbol  : method moveLines  (int)
location: class tetris
Note: C:\Program Files\Xinox Software\JCreator LE\MyProjects\tetris.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.
1 error

thats pretty much my error report. sorry if this is a dumb question. like i said we have been only doing this for about a month now, and my instructor hasn't really explained this stuff to us. and since its now spring break i have to have this done when i get back and what he left us to do seems to have an error. anything that could help i would greatly appreciate.

[jeef]

hmm, it looks like you are using some depreciated methods... but that wont cause it to not work.

do you have the definition for the 'moveLines()' method? or, is your class extending anything?

ie, your whole progrm might look like:

CODE

public class tetris {
 public void checkLines() {
   //this is your checkLines() method
 }

 public void moveLines() {
   //is your moveLines() method here??
 }
}

you will need the moveLines() method in there for it to find it. Also, may I may come code tidying suggestions:

CODE

public class tetris {
 public void checkLines() {
   int y=15;
   boolean filled;

   while(y>1) {
     filled=true;
     for(int x=1;x<16;x++) {
       if(gameboard[x][y]==0) {
         filled=false;
         break;
       }

   if(filled)
    moveLines(y);
   else
     y--;
   }
 }
}

[johnmcgrady]

hmm, it looks like you are using some depreciated methods... but that wont cause it to not work.

do you have the definition for the 'moveLines()' method? or, is your class extending anything?

ie, your whole progrm might look like:

CODE

public class tetris {
 public void checkLines() {
   //this is your checkLines() method
 }

 public void moveLines() {
   //is your moveLines() method here??
 }
}

you will need the moveLines() method in there for it to find it. Also, may I may come code tidying suggestions:

CODE

public class tetris {
 public void checkLines() {
   int y=15;
   boolean filled;

   while(y>1) {
     filled=true;
     for(int x=1;x<16;x++) {
       if(gameboard[x][y]==0) {
         filled=false;
         break;
       }

   if(filled)
    moveLines(y);
   else
     y--;
   }
 }
}

no i dont have a public void movelines method.. its all in the public void checkLines ... from the code i showed u do i need to put it in there?

[Lee]

yeah you'll definately need to have it defined somewhere in your tetris class.  just follow jeef's little block of code there for defining the moveLines(int) method.  the only other explaination i can think of would be if you have some other thread/object to take care of moving stuff, but i highly doubt that your instructor would start you out on threads a month into the language.

[johnmcgrady]

got the moveLines method in .. no errors .. thanks all


now when i try to run the program i get an error on the command prompt

Exception in thread "main" java.lang.NoSuchMethodError: main

Press any key to continue...


i have the code up on my site.. if someone could tell me what i'm missing here i would be very greatful. once again thanks


http://mysite.verizon.net/johnmcgrady/tetris.html

[E-E-R]

the code is OK, but since you have created an Applet, it needs to be run from a browser or AppletViewer.

add the file tetris.html to your project and put this code in:

CODE

<HTML>
<HEAD>
</HEAD>
<BODY BGCOLOR="000000">
<CENTER>
<APPLET
code = "tetris.class"
width = "500"
height = "300"
>
</APPLET>
</CENTER>
</BODY>
</HTML>

make sure the code = "tetris.class" points to the right dir/file and it should work (tested it here).

the game works by the way.

[johnmcgrady]

thanks that worked..

just wanna thank everyone who replied to my questions, you guys helped me out big time

once again thanks!

[Lee]

glad your program came together for ya.  i don't know how many programs i've started off well and then end with me opening up my case and punching the motherboard...

[jeef]

i didnt realise it was an applet?

if you want to run from the command line you will need the main() method like this:

CODE

//must be defined like this
public static void main(String args[]) {

//fire up a new object of your class
new tetris();
}

theres some other bits that you should have in their to "schedule" the start of the app but that should work like that. If you add that you wont get the error you got