Printing *s as triangles in Java?

Question

My assignment in my Java course is to make 3 triangles. One left aligned, one right aligned, and one centered. I have to make a menu for what type of triangle and then input

Answer 1

import java.util.Scanner;

public class A {

    public void triagle_center(int max){//max means maximum star having
        int n=max/2;
        for(int m=0;m<((2*n)-1);m++){//for upper star
            System.out.print(" ");
        }
        System.out.println("*");

        for(int j=1;j<=n;j++){
            for(int i=1;i<=n-j; i++){
                System.out.print("  ");
            }
            for(int k=1;k<=2*j;k++){
            System.out.print("* ");
            }

            System.out.println();
        }


    }

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

            System.out.println();
        }
    }

    public void triagle_left(int max){
        for(int j=1;j<=max;j++){
            for(int i=1;i<=max-j; i++){
                System.out.print("  ");
            }
            for(int k=1;k<=j; k++){
                System.out.print("* ");
            }

            System.out.println();
        }
    }

    public static void main(String args[]){
        A a=new A();
        Scanner input = new Scanner (System.in);
        System.out.println("Types of Triangles");
        System.out.println("\t1. Left");
        System.out.println("\t2. Right");
        System.out.println("\t3. Center");
        System.out.print("Enter a number: ");
        int menu = input.nextInt();
        Scanner input1 = new Scanner (System.in);
        System.out.print("maximum Stars in last row: ");
        int row = input1.nextInt();
        if (menu == 1)
            a.triagle_left(row);
        if (menu == 2)
            a.triagle_right(row);
        if (menu == 3)
            a.triagle_center(row);
    }
}