This is my java code:
class soduku
{
int[][] board ={
{8, 0, 0, 0, 0, 0, 0, 0, 0},
{0, 0, 3, 6, 0, 0, 0, 0, 0},
{0, 7, 0, 0, 9, 0, 2, 0, 0},
{0, 5, 0, 0, 0, 7, 0, 0, 0},
{0, 0, 0, 0, 4, 5, 7, 0, 0},
{0, 0, 0, 1, 0, 0, 0, 3, 0},
{0, 0, 1, 0, 0, 0, 0, 6, 8},
{0, 0, 8, 5, 0, 0, 0, 1, 0},
{0, 9, 0, 0, 0, 0, 4, 0, 0}};
int[][] mutable = mutable();
int[][] mutable()
{
int i,j;
int count = 0;
for(i=0;i<board.length;i++)
{
for(j=0; j<board[i].length;j++)
if (board[i][j] == 0)
count++;
}
int [][] mutable = new int[count][2];
int k = 0;
for(i=0;i<board.length;i++)
{
for(j=0; j<board[i].length; j++)
{
if(board[i][j]==0)
{
mutable[k][0]=i;
mutable[k][1]=j;
k++;
}
}
}
return mutable;
}
}
As you can see I have to count the number of zeroes so that I can declare the array mutable. I want to know if there's a better way so that could do the same thing. I am new to Java and only know about arrays and some basic data type.
