Display the Diamond Shape Asterisk using Java

Hi All,

I write a program to display the Diamond Shape Asterisk using Java.

import java.util.Scanner;


//main class

public class diamond {
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int no = input.nextInt();
        diamond access = new diamond();
        System.out.println("The shape for this is: ");
        access.diamond_res(no);
        
    }

 public String diamond_star(int no) //method1
    {
        if(no>0)
        {
            return "* " + diamond_star(no-1);
        }
        else
        {
            return " ";
        }
    }
     public String diamond_star1(int no)//method2
    {
        if(no>0)
        {
            return " * " + diamond_star(no-1);//access method1
        }
        else
        {
            return " ";
        }
    }
    public String blankSpace(int no) //method3
    {
        if(no>0)
        {
            return " " + blankSpace(no-1);
        }
        else
        {
            return " ";
        }
    }
    public void diamond_res(int no)//method4
    {
        for(int i=1; i<no; i++)
        {
            System.out.print(blankSpace(no-i));//access method3
             System.out.println(diamond_star(i));//access method1
            
        }
         for(int i=0; i<no; i++)
        {
            System.out.println(diamond_star1(no-i));//access method2
            System.out.print(blankSpace(i));//access method3
        }
     
    }
    
}

OUTPUT

~~~~~~~~

Enter a number: 6
The shape for this is:
      * 
     * * 
    * * * 
   * * * * 
  * * * * * 
 * * * * * * 
  * * * * * 
   * * * * 
    * * * 
     * * 
      *