Need help with loop

why isn't the second part of my triangle not working?
import java.util.*;

public class triangle
{

public static void main(String[] args)
{
int nLines = 5;
for (int row = 1; row <= nLines; row++)
{
for (int star= 1; star <= row; star++)
System.out.print("*");
System.out.println();
}

}

}

.