Aggiunti alcuni esercizi di java.

squeaky-clean/.exercism/config.json

@@ -0,0 +1,23 @@
+{
+  "authors": [
+    "ystromm"
+  ],
+  "files": {
+    "solution": [
+      "src/main/java/SqueakyClean.java"
+    ],
+    "test": [
+      "src/test/java/SqueakyCleanTest.java"
+    ],
+    "exemplar": [
+      ".meta/src/reference/java/SqueakyClean.java"
+    ],
+    "invalidator": [
+      "build.gradle"
+    ]
+  },
+  "forked_from": [
+    "csharp/squeaky-clean"
+  ],
+  "blurb": "Learn about characters and StringBuilder by cleaning strings."
+}

squeaky-clean/.exercism/metadata.json

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+{"track":"java","exercise":"squeaky-clean","id":"59e3a02272644cddb92f4bf0aa83748a","url":"https://exercism.org/tracks/java/exercises/squeaky-clean","handle":"GicoProgram","is_requester":true,"auto_approve":false}