init

in_class/cse123-inclass9/ReverseString.java

@@ -0,0 +1,22 @@
+public class ReverseString {
+    public static void main(String[] args){
+        System.out.println(reverse("Hello"));
+        System.out.println(reverse("nathan"));
+        System.out.println(reverse("racecar"));
+        System.out.println(reverse("taco"));
+        System.out.println(reverse("ABBA"));
+        System.out.println(reverse(""));
+        System.out.println(reverse("a"));
+    }
+
+    public static String reverse(String str){
+        if (str.isEmpty()) {
+            return "";
+        } else if (str.length() == 1) {
+            return str;
+        }
+
+        String backwards = reverse(str.substring(1)) + str.charAt(0);
+        return backwards;
+    }
+}