Can you improve this code?

Question

public class ForLoop0
{
/* This code generates a triangle using asterisks
*/
public static void main(String[] args) {
// First for loop makes 10 lines.
for (int l = 1; l <= 10; l++ ){
System.out.println();

// Second for loop prints asterisks.
for (int i = 1; i <= l; i++){
System.out.print("*");
}

}
}
}

Answer 1

● number of stars in each row forming an A.P, so you can add 1 star each time to form next row :
String str="";
for(int i=1;i<=10;i++)
System.out.println(str+="*");

Answer 2

for (int l = 1; l <= 10; l++ ){
for (int i = 1; i <= l; i++){
System.out.print("*");
}
System.out.println();
}