자바 - 반복문 연습(별 찍기)

①

public class Star1
{
	public static void main(String[] args)
	{
		for (int i=0; i<5; i++)
		{
			for (int x=0; x<5-i; x++)
				System.out.print(" ");
			
			for (int j=0; j<=i; j++)
				System.out.print("*");
                
			System.out.println();
		}
	}
}

 

 

②

public class Star2
{
	public static void main(String[] args)
	{
		for (int i=1; i<=5; i++)
		{
			for (int x=1; x<=5-i; x++)
				System.out.print(" ");
			
			for (int j=1; j<=(2*i)-1;j++)
				System.out.print("*");
			
			System.out.println();
		}
	}
}

 

 

③

public class Star3
{
	public static void main(String[] args)
	{        
		for (int i=1; i<=5; i++)
		{
			for (int x=0; x<i-1; x++)
				System.out.print(" ");	
			
			for (int y=1; y<=9-(2*(i-1)); y++)
				System.out.print("*");
			
		System.out.println();
		}
	}
}

 

 

④

public class Star4
{
	public static void main(String[] args)
	{ 
		int i,x,y;
		for (i=1; i<=9; i++)
		{
			if (i<=5)
			{
				for (x=1; x<=5-i; x++) 
					System.out.print(" ");
				
				for (y=1; y<=(2*i)-1;y++)
					System.out.print("*");
			}
			
			else if(i>=6)
			{
				for (x=1; x<=i-5;x++)
					System.out.print(" ");

				for (y=1;y<=9-(2*(x-1));y++)
					System.out.print("*");
			}
		System.out.println();
		}
	}
}