all tasks

Task/Sierpinski-triangle/Java/sierpinski-triangle-2.java

@@ -0,0 +1,27 @@
+import java.util.*;
+
+public class Sierpinski
+{
+    public static List<String> sierpinski(int n)
+    {
+        List<String> down = Arrays.asList("*");
+        String space = " ";
+        for (int i = 0; i < n; i++) {
+            List<String> newDown = new ArrayList<String>();
+            for (String x : down)
+                newDown.add(space + x + space);
+            for (String x : down)
+                newDown.add(x + " " + x);
+
+            down = newDown;
+            space += space;
+        }
+        return down;
+    }
+
+    public static void main(String[] args)
+    {
+        for (String x : sierpinski(4))
+            System.out.println(x);
+    }
+}