feat: update java code and add directory tree

* 更新 Java 代码
* 添加源代码目录树

Author: yanglbme

java/README.md

@@ -0,0 +1,29 @@
+# Java 文件目录树
+```bash
+├─main
+│  ├─java
+│  │  │  AutoComplete.java
+│  │  │  DistributedLock.java
+│  │  │  LoginSession.java
+│  │  │  Paginate.java
+│  │  │  Ranking.java
+│  │  │  SocialRelationship.java
+│  │  │  URLShorten.java
+│  │  │
+│  │  └─utils
+│  │          JedisUtils.java
+│  │
+│  └─resources
+└─test
+    ├─java
+    │      AutoCompleteTest.java
+    │      DistributedLockTest.java
+    │      LoginSessionTest.java
+    │      PaginateTest.java
+    │      RankingTest.java
+    │      SocialRelationshipTest.java
+    │      URLShortenTest.java
+    │
+    └─resources
+
+```

java/src/main/java/DistributedLock.java

@@ -4,7 +4,6 @@
 
 import java.util.UUID;
 
-
 public class DistributedLock {
 
     private Jedis client = JedisUtils.getClient();

java/src/main/java/LoginSession.java

@@ -7,7 +7,6 @@
 import java.time.Instant;
 import java.util.Random;
 
-
 public class LoginSession {
 
     private final String SESSION_TOKEN_KEY = "SESSION:TOKEN";

java/src/main/java/Ranking.java

@@ -5,10 +5,6 @@
 import java.util.Calendar;
 import java.util.Set;
 
-/**
- * @author bingoyang
- * @date 2019/9/7
- */
 public class Ranking {
     private Jedis client = JedisUtils.getClient();
     private Calendar calendar = Calendar.getInstance();

java/src/test/java/AutoCompleteTest.java

@@ -13,9 +13,16 @@ public void testHint() {
         ac.feed("张艺谋", 3000);
         ac.feed("张三", 500);
         assertEquals(ac.hint("张", 10),
-                new LinkedHashSet<String>() {{ add("张艺兴"); add("张艺谋"); add("张三"); }});
+                new LinkedHashSet<String>() {{
+                    add("张艺兴");
+                    add("张艺谋");
+                    add("张三");
+                }});
 
         assertEquals(ac.hint("张艺", 10),
-                new LinkedHashSet<String>() {{ add("张艺兴"); add("张艺谋"); }});
+                new LinkedHashSet<String>() {{
+                    add("张艺兴");
+                    add("张艺谋");
+                }});
     }
-}
+}

java/src/test/java/DistributedLockTest.java

@@ -20,4 +20,4 @@ public void testDistributedLock() throws InterruptedException {
 
         assertTrue(lock.acquire());
     }
-}
+}

java/src/test/java/LoginSessionTest.java

@@ -11,7 +11,7 @@ public void testLoginSession() {
         String token = session.create();
 
         String res = session.validate("this is a wrong token");
-        assertEquals( "SESSION_TOKEN_INCORRECT", res);
+        assertEquals("SESSION_TOKEN_INCORRECT", res);
 
         res = session.validate(token);
         assertEquals("SESSION_TOKEN_CORRECT", res);

java/src/test/java/PaginateTest.java

@@ -29,4 +29,4 @@ public void testPaginate() {
                 topics.getPage(5, 5));
 
     }
-}
+}

java/src/test/java/RankingTest.java

@@ -6,7 +6,6 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-
 public class RankingTest {
 
     @Test
@@ -28,4 +27,4 @@ public void testRanking() {
         expectResult.add(new Tuple("lily", 4.0));
         assertEquals(expectResult, ranking.getMonthTopNWithScores(3));
     }
-}
+}

java/src/test/java/SocialRelationshipTest.java

@@ -5,7 +5,6 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
-
 public class SocialRelationshipTest {
 
     @Test
@@ -19,14 +18,20 @@ public void testSNS() {
         iris.follow("GitHub");
 
         assertTrue(bingo.isFollowing("Iris"));
-        assertEquals(new HashSet<String>() {{ add("Apple"); add("GitHub"); add("Iris"); }},
+        assertEquals(new HashSet<String>() {{
+                         add("Apple");
+                         add("GitHub");
+                         add("Iris");
+                     }},
                 bingo.getAllFollowing());
 
         assertTrue(iris.isFollowing("Bingo"));
 
         assertEquals(3, bingo.countFollowing());
-        assertEquals(new HashSet<String>() {{ add("GitHub"); }},
+        assertEquals(new HashSet<String>() {{
+                         add("GitHub");
+                     }},
                 bingo.getCommonFollowing("Iris"));
 
     }
-}
+}