[JAVA] 별찍기

@챈챈/#Other
[JAVA] 별찍기

자바장인 2020. 2. 20. 14:58
안녕하세요 자바 악개입니다. 지금은 조건문과 반복문을 처음 접하기 딱 좋은 별찍기입니다.
삼각형, 역삼각형, 피라미드, 다이아몬드를 찍겠습니다.
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import java.util.Scanner;
 
class figure
{
    public void menu()
    {
        System.out.println("1. 삼각형 만들기");
        System.out.println("2. 역삼각형 만들기");
        System.out.println("3. 피라미드 만들기");
        System.out.println("4. 다이아몬드 만들기");
        System.out.print("입력 : ");
    }
 
    public void choiceMenu()
    {
        while(true)
        {
            menu();
            Scanner scan = new Scanner(System.in);
            int key = 0;
            key = scan.nextInt();
 
            switch(key)
            {
            case 1:
            {
                triangle();
            }
            break;
            case 2:
            {
                invertedTriangle();
            }
            break;
            case 3:
            {
                pyramid();
            }
            break;
            case 4:
            {
                diamond();
            }
            break;
            }
        }
    }
 
    //삼각형
    public void triangle()
    {
        System.out.print("숫자를 입력하세요 : ");
        Scanner scan = new Scanner(System.in);
        int number = scan.nextInt();
        for(int i = 0; i<number;i++)
        {
            for(int k = 0; k<=i; k++)
            {
                System.out.print("*");
            }
            System.out.println("");
        }
    }
 
    //역삼각형
    public void invertedTriangle()
    {
        System.out.print("숫자를 입력하세요 : ");
        Scanner scan = new Scanner(System.in);
        int number = scan.nextInt();
        for(int i = 0; i<number;i++)
        {
            for(int k = number; k>i;k--)
            {
                System.out.print("*");
            }
            System.out.println("");
        }
    }
 
    //피라미드
    public void pyramid()
    {
        System.out.print("숫자를 입력하세요 : ");
        Scanner scan = new Scanner(System.in);
        int number = scan.nextInt();
        for(int i = 0; i<number; i++)
        {
            for(int j = number-1; j>i; j--)
            {
                System.out.print(" ");
            }
            for(int k = 0; k<=i; k++)
            {
                System.out.print("* ");
            }
            System.out.println("");
        }
    }
 
 
    //다이아몬드
    public void diamond()
    {
        System.out.print("숫자를 입력하세요 : ");    
        Scanner scan = new Scanner(System.in);
        int number = scan.nextInt();
        for(int i = 0; i<number; i++)
        {
            for(int j = number-1; j>i; j--)
            {
                System.out.print(" ");
            }
            for(int k = 0; k<=i; k++)
            {
                System.out.print("* ");
            }
            System.out.println("");
        }
        for(int i = 0; i<number; i++)
        {
            for(int j = 0; j<=i; j++)
            {
                System.out.print(" ");
            }
            for(int k = number-1; k>i; k--)
            {
                System.out.print("* ");
            }
            System.out.println("");
        }
    }
}
 
public class forLoop {
    public static void main(String args[])
    {
        figure p = new figure();
        p.choiceMenu();
    }
}
 