Programming Forums > Application Development > Java

thenewkid · Feb 17th, 2005, 12:34 AM

hey...
im was writing the code for the game of life..u prob have herd about that ..im almost done...i just need add the code which determines which gameboard the user wants to use...here i got stuck lol..at the very end...
im gettin .class expected error
here is the sample code with the identical error......

(Toggle Plain Text)

public class test
{
	public static void main(String[] args)
	{
		int sel = 2;

		int array[][] = null;
		
		if(sel == 2)
		    int array[][] = {{2,2},
				         {2,2}};
		else
		    int array[][] = {{0,0},
				         {0,0}};

		for(int i = 0; i < array.length; i++)
		{
			 System.out.println();
			 for(int j = 0; j < array[0].length; j++)
			  {
				System.out.print(array[i][j] + " ");
			  }
		}
	}
}

all i found on the net was that this error is commonly caused by extra, or missing bracket...please help!!
thanx

Cup O' Java · Feb 17th, 2005, 12:44 AM

are you missing packages or dont you need them for this program?

xavier · Feb 17th, 2005, 12:58 AM

You could do it this way:

(Toggle Plain Text)

	 public class test
{
	public static void main(String[] args)
	{
		int sel = 2;

		int array[][] =new int[2][2];

		if(sel == 2)
		for(int i=0;i<2;i++)
		   for(int j=0;j<2;j++){
		    array[i][j] =2;
		    }
		else
		for(int i=0;i<2;i++)
		   for(int j=0;j<2;j++){
		    array[i][j] =0;
		    }

		for(int i = 0; i < array.length; i++)
		{
			 System.out.println();
			 for(int j = 0; j < array[0].length; j++)
			  {
				System.out.print(array[i][j] + " ");
			  }

		}
			 System.out.println();
	}
}

thenewkid · Feb 17th, 2005, 9:39 AM

im sorry i didnt state my question right....im gonna tell u what i want to do...
if the user presses 1 for example i want to initilize the array with certain values...then if user presses 2 i want to initilize the same array with different values...i want to use the same array name in both cases, and i want the case to determine what values this array will be initialized with....i hope this will help u to figure this out...
thanks again!!

Infinite Recursion · Feb 17th, 2005, 9:48 AM

u can put a file of set grid size and values for each data set, plus a blank grid for random population. read the values from the file into the array to populate the "grid".

thenewkid · Feb 17th, 2005, 10:33 AM

good idea...but the problem is im not allowed to use file input

Berto · Feb 17th, 2005, 10:52 AM

these are the 2 ways of initilising an array in java:

arrayType arrayName[][] = {{row 1},{row2}};

or for a fixed lenght one

arrayType arrayName[][] = new arrayType[x][y];

you cant add values in teh {{},{}} way after you have created the initial arry by the looks of things (looked in book), so either use 2 arrays and just use an if statement on the sel so

(Toggle Plain Text)

if (sel ==2){
        print array1;
}else{
       print array2;
}

or use xaviars way.

thenewkid · Feb 17th, 2005, 5:17 PM

oki ..i got it ...i hadda use different names for arrays in different cases...i just wonder why it didnt work the way i wanted...anyways, thanks for your help...i really appreciate it...

Feb 17th, 2005, 12:34 AM	#1
thenewkid Programmer Join Date: Sep 2004 Location: New Jersey Posts: 36 Rep Power: 0	lost hey... im was writing the code for the game of life..u prob have herd about that ..im almost done...i just need add the code which determines which gameboard the user wants to use...here i got stuck lol..at the very end... im gettin .class expected error here is the sample code with the identical error...... (Toggle Plain Text) public class test { public static void main(String[] args) { int sel = 2; int array[][] = null; if(sel == 2) int array[][] = {{2,2}, {2,2}}; else int array[][] = {{0,0}, {0,0}}; for(int i = 0; i < array.length; i++) { System.out.println(); for(int j = 0; j < array[0].length; j++) { System.out.print(array[i][j] + " "); } } } } public class test { public static void main(String[] args) { int sel = 2; int array[][] = null; if(sel == 2) int array[][] = {{2,2}, {2,2}}; else int array[][] = {{0,0}, {0,0}}; for(int i = 0; i < array.length; i++) { System.out.println(); for(int j = 0; j < array[0].length; j++) { System.out.print(array[i][j] + " "); } } } } all i found on the net was that this error is commonly caused by extra, or missing bracket...please help!! thanx

Feb 17th, 2005, 12:58 AM	#3
xavier Professional Programmer Join Date: Oct 2004 Location: .ro Posts: 398 Rep Power: 5	You could do it this way: (Toggle Plain Text) public class test { public static void main(String[] args) { int sel = 2; int array[][] =new int[2][2]; if(sel == 2) for(int i=0;i<2;i++) for(int j=0;j<2;j++){ array[i][j] =2; } else for(int i=0;i<2;i++) for(int j=0;j<2;j++){ array[i][j] =0; } for(int i = 0; i < array.length; i++) { System.out.println(); for(int j = 0; j < array[0].length; j++) { System.out.print(array[i][j] + " "); } } System.out.println(); } } public class test { public static void main(String[] args) { int sel = 2; int array[][] =new int[2][2]; if(sel == 2) for(int i=0;i<2;i++) for(int j=0;j<2;j++){ array[i][j] =2; } else for(int i=0;i<2;i++) for(int j=0;j<2;j++){ array[i][j] =0; } for(int i = 0; i < array.length; i++) { System.out.println(); for(int j = 0; j < array[0].length; j++) { System.out.print(array[i][j] + " "); } } System.out.println(); } } __________________ Don't take life too seriously, it's not permanent !

Feb 17th, 2005, 9:48 AM	#5
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	u can put a file of set grid size and values for each data set, plus a blank grid for random population. read the values from the file into the array to populate the "grid". __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Feb 17th, 2005, 10:52 AM	#7
Berto Programming Guru Join Date: Aug 2004 Posts: 1,022 Rep Power: 6	these are the 2 ways of initilising an array in java: arrayType arrayName[][] = {{row 1},{row2}}; or for a fixed lenght one arrayType arrayName[][] = new arrayType[x][y]; you cant add values in teh {{},{}} way after you have created the initial arry by the looks of things (looked in book), so either use 2 arrays and just use an if statement on the sel so (Toggle Plain Text) if (sel ==2){ print array1; }else{ print array2; } if (sel ==2){ print array1; }else{ print array2; } or use xaviars way.

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Feb 17th, 2005, 12:44 AM	#2
Cup O' Java Newbie Join Date: Dec 2004 Posts: 18 Rep Power: 0	are you missing packages or dont you need them for this program?

Feb 17th, 2005, 9:39 AM	#4
thenewkid Programmer Join Date: Sep 2004 Location: New Jersey Posts: 36 Rep Power: 0	im sorry i didnt state my question right....im gonna tell u what i want to do... if the user presses 1 for example i want to initilize the array with certain values...then if user presses 2 i want to initilize the same array with different values...i want to use the same array name in both cases, and i want the case to determine what values this array will be initialized with....i hope this will help u to figure this out... thanks again!!

Feb 17th, 2005, 10:33 AM	#6
thenewkid Programmer Join Date: Sep 2004 Location: New Jersey Posts: 36 Rep Power: 0	good idea...but the problem is im not allowed to use file input

Feb 17th, 2005, 5:17 PM	#8
thenewkid Programmer Join Date: Sep 2004 Location: New Jersey Posts: 36 Rep Power: 0	oki ..i got it ...i hadda use different names for arrays in different cases...i just wonder why it didnt work the way i wanted...anyways, thanks for your help...i really appreciate it...

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Programming Forums > Application Development > Java

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