Pascal Triangle in Java

PascalTriangle.java

public class PascalTriangle {
    public static final int LINES = 10;

    public static void main(String[] args) {
        int[][] a = new int[LINES][];
        for (int i = 0, j = 1; i < LINES; i++, j++) {
            a[i] = new int[j];
            for (int k = 0; k < j; k++) {
                a[i][k] = (i == 0 || k == 0 || k == j - 1) ? 1 : a[i - 1][k - 1] + a[i - 1][k];
            }
        }
        for (int i = 0; i < LINES; i++) {
            for (int j = 0; j <= i; j++) {
                System.out.print(a[i][j] + " ");
            }
            System.out.println();
        }
    }
}