Задача решена. Но есть ли более лаконичное решение?

public static void main(String[] args) throws InterruptedException {

    final int HEIGHT = 10, WEIGHT = 20;
    final int COUNT = 100_000;
    Date dateStart;
    Date dateStop;

    // Вариант 1
    char[][] fieldS = new char[HEIGHT][WEIGHT];
    dateStart = new Date();
    for (int k = 0; k < COUNT; k++) {
        for (int i = 0; i < HEIGHT; i++) {
            for (int j = 0; j < WEIGHT; j++) {
                boolean isEdge = (i == 0 || i == HEIGHT - 1 || j == 0 || j == WEIGHT - 1);
                fieldS[i][j] = (isEdge ? 'Б' : ' ');
            }
        }
    }
    dateStop = new Date();
    System.out.println(dateStop.getTime() - dateStart.getTime());

//Вариант 2
    char[][] fieldC = new char[HEIGHT][WEIGHT];
    dateStart = new Date();
    for (int k = 0; k < COUNT; k++) {
        for (int i = 0; i < WEIGHT; i++) {
            fieldC[0][i] = 'Б';
        }
        for (int i = 1; i < HEIGHT - 1; i++) {
            fieldC[i][0] = 'Б';
            for (int j = 1; j < WEIGHT - 1; j++) {
                fieldC[i][j] = ' ';
            }
            fieldC[i][WEIGHT - 1] = 'Б';
        }
        for (int i = 0; i < WEIGHT; i++) {
            fieldC[HEIGHT - 1][i] = 'Б';
        }
    }
    dateStop = new Date();
    System.out.println(dateStop.getTime() - dateStart.getTime());

    // Вариант 3
    char[][] fieldX = new char[HEIGHT][WEIGHT];
    dateStart = new Date();
    for (int k = 0; k < COUNT; k++) {
        int c = 20;
        while (c > 0) {
            fieldX[0][c - 1] = 'Б';
            c--;
        }
        int b = 8;
        while (b > 0) {
            int a = 20;
            while (a > 0) {
                if (a == 1 || a == 20) fieldX[b - 1][a - 1] = 'Б';
                else fieldX[b - 1][a - 1] = ' ';
                a--;
            }
            b--;
        }
        int d = 20;
        while (d > 0) {
            fieldX[0][d - 1] = 'Б';
            d--;
        }
    }
    dateStop = new Date();
    System.out.println(dateStop.getTime() - dateStart.getTime());

}