DIAMOND using Single For

import java.util.Scanner;

public class DiamondSingleFor {

    public static void main(String[] args) {
        System.out.print("Masukan Input : ");
        Scanner input=new Scanner(System.in);
        int a;
        a=input.nextInt();
        int b=1;
        int c=a;
        a=(a+(a-1));
        c=a-c;
        int d=1;
        int f=0;
        for(int e=0;e<a;){
            if(c>=0){
                if(b<=c)
                    System.out.print(" ");
                else if(f<d){
                    System.out.print("*");
                    f++;
                }
                else{
                    d+=2;
                    c--;
                    System.out.println();
                    b=0;
                    f=0;
                    e++;
                }
                b++;
            }
            else if(c==-1){
                d-=4;
                c--;
                b=-1;
            }
            else{
                if(b>c)
                    System.out.print(" ");
                else if(f<d){
                    System.out.print("*");
                    f++;
                }
                else{
                    d-=2;
                    c--;
                    System.out.println();
                    b=0;
                    f=0;
                    e++;
                }
                b--;
            }
        }
    }
}