Add all the A tasks

Task/Anagrams-Deranged-anagrams/Java/anagrams-deranged-anagrams.java

@@ -0,0 +1,62 @@
+import java.io.*;
+import java.util.*;
+
+public class DerangedAnagrams {
+
+    public static void main(final String[] args) throws IOException {
+        if (!findAnagrams(readLines("unixdict.txt")))
+            System.out.println("no result");
+    }
+
+    private static boolean isDeranged(final String w, final List<String> lst) {
+        for (String w2 : lst) {
+            int k = w.length() - 1;
+            while (k >= 0 && w.charAt(k) != w2.charAt(k)) {
+                k--;
+            }
+            if (k == -1) {
+                System.out.println(w + ", " + w2);
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static boolean findAnagrams(final List<String> words) {
+        Collections.sort(words, new Comparator<String>() {
+            public int compare(String a, String b) {
+                return b.length() - a.length();
+            }
+        });
+        Map<String, ArrayList<String>> map = new HashMap<>();
+        for (String w : words) {
+            char[] srt = w.toCharArray();
+            Arrays.sort(srt);
+            String key = String.valueOf(srt);
+            ArrayList<String> lst;
+            if (map.containsKey(key)) {
+                lst = map.get(key);
+                if (isDeranged(w, lst)) {
+                    return true;
+                }
+                lst.add(w);
+            } else {
+                lst = new ArrayList<>();
+                lst.add(w);
+                map.put(key, lst);
+            }
+        }
+        return false;
+    }
+
+    private static List<String> readLines(final String fn) throws IOException {
+        List<String> lines;
+        try (BufferedReader br = new BufferedReader(new FileReader(fn))) {
+            lines = new ArrayList<>();
+            String line = null;
+            while ((line = br.readLine()) != null)
+                lines.add(line);
+        }
+        return lines;
+    }
+}