Aggiunti alcuni esercizi di java.

hamming/.exercism/config.json

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+{
+  "authors": [
+    "wdjunaidi"
+  ],
+  "contributors": [
+    "c-thornton",
+    "ChristianWilkie",
+    "FridaTveit",
+    "javaeeeee",
+    "jmrunkle",
+    "jonnynabors",
+    "jtigger",
+    "kytrinyx",
+    "lemoncurry",
+    "matthewmorgan",
+    "michael-berger-FR",
+    "michaelspets",
+    "mirkoperillo",
+    "msomji",
+    "muzimuzhi",
+    "odzeno",
+    "sjwarner-bp",
+    "SleeplessByte",
+    "Smarticles101",
+    "sshine",
+    "stkent",
+    "t0dd",
+    "Valkryst",
+    "vasouv",
+    "Zaldrick"
+  ],
+  "files": {
+    "solution": [
+      "src/main/java/Hamming.java"
+    ],
+    "test": [
+      "src/test/java/HammingTest.java"
+    ],
+    "example": [
+      ".meta/src/reference/java/Hamming.java"
+    ],
+    "invalidator": [
+      "build.gradle"
+    ]
+  },
+  "blurb": "Calculate the Hamming difference between two DNA strands.",
+  "source": "The Calculating Point Mutations problem at Rosalind",
+  "source_url": "http://rosalind.info/problems/hamm/"
+}

hamming/.exercism/metadata.json

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+{"track":"java","exercise":"hamming","id":"3935f75ded4a4915b3a9d6ba595ad807","url":"https://exercism.org/tracks/java/exercises/hamming","handle":"GicoProgram","is_requester":true,"auto_approve":false}