Getting a constructor error in processing - constructor

Question

I'm playing with processing from some days, but I encountered an error that i didn't understand. I declared the class and the constructor with the proper arguments, maybe you can help me. This is the code:
Cell[][] grid;
int rnc = 5;
int side = 5;
void setup(){
size(rnc*side,rnc*side);
grid = new Cell[rnc][rnc];
for(int i = 0; i < rnc; i++){
for(int j = 0; j < rnc; j++){
grid[i][j] = new Cell(i,j);
rect(grid[i][j].row*side,grid[i][j].column*side,side,side);
}
}
}
void draw(){}
class Cell
{
boolean isChecked;
int row,column;
int side;
void Cell(int trow, int tcolumn){
row=trow;
column=tcolumn;
}
void toggleCheck(){
if(isChecked == true){
isChecked = false;
}else{
isChecked = true;
}
}
}
The error I got after i tried to ran the program is : The constructor sketch.Cell(int,int) is undefined.
Thank you in advance.

Answer 1

I'm assuming this is Java, although you haven't specified a language. If so, this is the problem:
void Cell(int trow, int tcolumn){
row=trow;
column=tcolumn;
}
That's not a constructor. That's a method called Cell, with a void return type. You meant:
Cell(int trow, int tcolumn){
row=trow;
column=tcolumn;
}
(Or possibly public Cell(...).)
At that point, you should be okay. Note that this would have been a compile-time error - not an execution-time error. Don't try to run your code until it compiles.
Also, it's not clear why you've made your constructor parameters trow and tcolumn - what's the t meant to be for? I'd also make your variables private, and final if possible, and simplify your toggleCheck method. For example:
public final class Cell {
private final int row, column;
private boolean checked;
// It's not clear what side was for
public Cell(int row, int column) {
this.row = row;
this.column = column;
}
public void toggleChecked() {
checked = !checked;
}
public boolean isChecked() {
return checked;
}
}