Bentuk Ketupat

public class BentukKetupat
{
public static void main (String[] args)
{
int a,b;
for (b=4;b>=1;b--)
{
for (a=1;a<=b;a++)
{
System.out.print(" ");
}
for (a=b;a<=4;a++)
{
System.out.print("* ");
}
System.out.println(" ");
}
for (a=1;a<=5;a++)
System.out.print("* ");
System.out.println(" ");
for (b=4;b>=1;b--)
{
for (a=b;a<=4;a++)
{
System.out.print(" ");
}
for (a=1;a<=b;a++)
{
System.out.print("* ");
}
System.out.println(" ");
}
}
}

dan hasilnya akan nampak seperti ketupat