Sudoku Java - Efficient way

Question

I am programming a sudoku puzzle with each cell represented by a JTextField , for 81 JTextField objects in total. This arrangement leaves me wondering about how to efficiently clear the puzzle.

Right now I have this:

void clear() {
    t1.setText("");
    t2.setText("");
    t3.setText("");
    t4.setText("");
    t5.setText("");
    t6.setText("");
    t7.setText("");
    t8.setText("");
    t9.setText("");
    t10.setText("");
    t11.setText("");
    t12.setText("");
    t13.setText("");
    t14.setText("");
    t15.setText("");
         .
         .
    t81.setText("");
}

That's 81 .setText() calls. Is there a better way to clear my puzzle?

Answer 1

Instead of t1 ... t81 declare them like this:

JTextField[][] textField = new JTextField[9][9];

Refer to them like textField[2][2] where this is the third row and third column ( [0] is the first, remember!). Because this is a JTextField I assume you are making UI, so for textField[i][j] i and j could be rows/columns depending on how you put them on the screen.

To clear them all use a for loop. This is easy, so instead of answering this part I prepared a Google search for you.