* use make a star!!! how?

[junjun61991]

please help me..how to make a star using the (*)!!

import java.io.*;
public class Prelim{
	
	public static InputStreamReader reader=new InputStreamReader (System.in);
	public static BufferedReader input=new BufferedReader (reader);
	public static void main (String[]args) throws Exception{
		
		double a, b, 
		
		System.out.println("Enter number:");
		a = Double.parseDouble(input.readLine());
	 	a=1;
		{
			for(a=1; a<7; a++)
				
			{
				System.out.println("*");			
	}
} 
	}
}