TemperatureGridRunner (2014 FRQ 3)

import java.util.Arrays;

class TemperatureGrid {
    private double[][] temps;

    public TemperatureGrid(double[][] temps) {
        this.temps = new double[temps.length][temps[0].length];
        for (int i = 0; i < temps.length; i++) {
            System.arraycopy(temps[i], 0, this.temps[i], 0, temps[0].length);
        }
    }

    private double computeTemp(int row, int col) {
        if (row == 0 || col == 0 || row == temps.length - 1 || col == temps[0].length - 1)
            return temps[row][col];
        return ((temps[row - 1][col] + temps[row + 1][col] + temps[row][col - 1] + temps[row][col + 1]) / 4);
    }

    public boolean updateAllTemps(double tolerance) {
        boolean flag = true;
        double[][] updated = new double[temps.length][temps[0].length];

        for (int row = 0; row < temps.length; row++)
            for (int col = 0; col < temps[0].length; col++) {
                updated[row][col] = computeTemp(row, col);
                if ((Math.abs(temps[row][col] - updated[row][col])) > tolerance)
                    flag = false;
            }

        for (int r = 0; r < temps.length; r++)
            for (int c = 0; c < temps[0].length; c++)
                temps[r][c] = updated[r][c];

        return flag;
    }

    public String toString() {
        String output = "";
        for (double[] temp : temps)
            output += Arrays.toString(temp) + "\n";
        return output;
    }
}

public class TemperatureGridRunner {
    public static void main(String[] args) {
        double[][] arr = new double[][]{
                {95.5, 100, 100, 100, 100, 110.3},
                {0, 50, 50, 50, 50, 0},
                {0, 40, 40, 40, 40, 0},
                {0, 20, 20, 20, 20, 0},
                {0, 0, 0, 0, 0, 0},
        };
        TemperatureGrid runner = new TemperatureGrid(arr);
        System.out.println(runner);
        boolean test = runner.updateAllTemps(15);
        System.out.println(runner);
        System.out.println(test);
    }
}