How to optimize if-statements

this sounds like a quite stupid question, but I have the problem, that a actions, depending on a boolean value, which is a parameter should be executed for every element in a data structure like an array. Now i am asking for this value at every pass in the loop, which is very inefficient, because this value doesn't change in that method and I need a better solution. I actually tried to combine to methods, because I was teached that a code is better, when it has few lines. But I think that also the performance is important (i measured the time that was needed to execute all methods and the combined methode took more than 100 times longer).

Combined:

public int[][] copyGrid(boolean g1ToT1) {
        int[][] g = new int[9][9];
        int[][] g1 = s.getGrid();
        for(int i=0; i<t.length; i++) {
            for(int j=0; j<t.length; j++) {
                if(g1ToT1) t[i][j].setText(Integer.toString(g1[i][j]));
                else {
                    try {
                        g[i][j] = Integer.parseInt(t[i][j].getText());
                    } catch(Exception e) {}
                }
            }
        }
        return g;

    }

Method1:

public int[][] gridToSudoku() {
        int[][] g = new int[9][9];
        for(int i=0; i<t.length; i++) {
            for(int j=0; j<t.length; j++) {
                try {
                g[i][j] = Integer.parseInt(t[i][j].getText());
                } catch(Exception e) {}
            }
        }
        return g;
    }

Method2:

public void sudokuToGrid(int[][] g) {
        for(int i=0; i<9; i++) {
            for(int j=0; j<9; j++) {
                t[i][j].setText(g[i][j] == 0 ? "" : Integer.toString(g[i][j]));
            }
        }
    }