Reverse pyramid unable to print why?

#1 
public static void main(String[] args) {
	
	System.out.println("pattern 10 ");
	
	Scanner scan = new Scanner(System.in);
	int n = scan.nextInt();
	
	int rows=1;

	int nst =2*n-1;
	
	while(rows<=n)
	{
		//work for spaces 
		
		for(int csp=1;csp<2*rows-1;csp++)
		{
			System.out.print(" ");
		}
		
		
		//work for stars 

		for(int cst = 1; cst<=nst;cst++)
		{
			System.out.print("*");
		}
		
		
		
		
		//preparation
		System.out.println();
		
		 rows++;
		
		
		
	}
	
	//	public static void main(String[] args) {
	
	System.out.println("pattern 10 ");
	
	Scanner scan = new Scanner(System.in);
	int n = scan.nextInt();
	
	int rows=1;

	int nst =2*n-1;
	
	while(rows<=n)
	{
		//work for spaces 
		
		for(int csp=1;csp<2*rows-1;csp++)
		{
			System.out.print(" ");
		}
		
		
		//work for stars 

		for(int cst = 1; cst<=nst;cst++)
		{
			System.out.print("*");
		}
		
		
		
		
		//preparation
		System.out.println();
		
		 rows++;
		
		
		
	}
	
	//	public static void main(String[] args) {
	
	System.out.println("pattern 10 ");
	
	Scanner scan = new Scanner(System.in);
	int n = scan.nextInt();
	
	int rows=1;

	int nst =2*n-1;
	
	while(rows<=n)
	{
		//work for spaces 
		
		for(int csp=1;csp<2*rows-1;csp++)
		{
			System.out.print(" ");
		}
		
		
		//work for stars 

		for(int cst = 1; cst<=nst;cst++)
		{
			System.out.print("*");
		}
		
		
		
		
		//preparation
		System.out.println();
		
		 rows++;
		
		
		
	}
	
	reverse pyramid unable to print