Initial data commit

Task/Semordnilap/Java/semordnilap.java

@@ -0,0 +1,20 @@
+import java.nio.file.*;
+import java.util.*;
+
+public class Semordnilap {
+
+    public static void main(String[] args) throws Exception {
+        List<String> lst = Files.readAllLines(Paths.get("unixdict.txt"));
+        Set<String> seen = new HashSet<>();
+        int count = 0;
+        for (String w : lst) {
+            w = w.toLowerCase();
+            String r = new StringBuilder(w).reverse().toString();
+            if (seen.contains(r)) {
+                if (count++ < 5)
+                    System.out.printf("%-10s %-10s\n", w, r);
+            } else seen.add(w);
+        }
+        System.out.println("\nSemordnilap pairs found: " + count);
+    }
+}