A boat like pattern in JAVA

Here come another time-pass pattern from our friend Soham Chakraborty. It gives a boat like pattern. I am not the actual author of this code. Enjoy it !!!
Code:

class Pattern{
public static void main(){
int sp=15,s=0,d=17;
for(int i=1;i<=6;i++){
for(int j=0;j<sp;j++){
System.out.print(" ");}
for(int k=1;k<=i;k++){
System.out.print("! ");}
sp--;System.out.println();
}
for(int i=1;i<=4;i++){
for(int j=0;j<s;j++)
{ System.out.print(" ");}
for(int k=1;k<=d;k++){
System.out.print("* ");}
s++;d--;System.out.println();
}
}
}