star design programs

I need to get this output
*
* * *
* * * * *
please can some one help me by giving the codings..

class Star{

}

Code :

---

class Space {
 private ArrayList<int, Star> stars = new ArrayList<int, Star>();
}

---

class Star {
public static void main (String [] args){
int a = Integer.parseInt(javax.swing.JOptionPane.showInput Dialog(null,"Insert Rows of Star:"));

for (int i=0;i<=a*2;i++){
if (i % 2 == 0){
continue;
}else{
for (int j=0;j<i;j++){
System.out.print ("*");
}
}
System.out.println ("");
}
}
}

Try this code, may be it can solved your problem.

class Star{


public static void main (String args[]){


for(int i=0;i<5;++i){
for(int j=5;j>i;--j){
System.out.print(" ");

}
for(int j=1;j<=i;++j){
System.out.print("*");

}
for(int j=2;j<=i;++j){
System.out.print("*");

}
System.out.println();

}


}



}

i need to print in this form
1 2 3 4 5 6
3 5 7 9 11
8 12 16 20

i need program for this

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