Shape.java

package hellojava;

public class Shape {

    public void leftTriangle(int n) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println("");
        }
    }

    public void rightTriangle(int n) {
        int i, j, k;
        for (i = 1; i <= n; i++) {
            for (j = 1; j <= (n - i); j++) {
                System.out.print(" ");
            }
            for (k = j; k <= n; k++) {
                System.out.print("*");
            }
            System.out.println("");
        }
    }

    public void pyramid(int n) {
        int i, j, k;
        for (i = 1; i <= n; i++) {
            for (j = 1; j <= (n - i); j++) {
                System.out.print(" ");
            }

            for (k = 1; k <= i; k++) {
                System.out.print("* ");
            }

            System.out.println("");
        }
    }

    public void numPyramid(int n) {
        int counter = 1;
        int i, j, k;

        for (i = 1; i <= n; i++) {
            for (j = 1; j <= (n - i); j++) {
                System.out.print(" ");
            }

            int t = counter;

            for (k = 1; k <= i; k++) {
                System.out.print(counter);
                counter++;
            }


            for (int l = counter - 2; l >= t; l--) {
                System.out.print(l);
            }

            counter = k;

            System.out.println("");
        }
    }

}