Refactor RxJava (#2749)

* Refactor RxJava

* Merge fix

algorithms/src/main/java/com/baeldung/algorithms/bubblesort/BubbleSort.java

@@ -4,22 +4,20 @@ import java.util.stream.IntStream;
 
 public class BubbleSort {
 
-    public void bubbleSort(Integer[] arr) {
+    void bubbleSort(Integer[] arr) {
         int n = arr.length;
         IntStream.range(0, n - 1)
-            .forEach(i -> {
-                IntStream.range(i + 1, n - i)
-                    .forEach(j -> {
-                        if (arr[j - 1] > arr[j]) {
-                            int temp = arr[j];
-                            arr[j] = arr[j - 1];
-                            arr[j - 1] = temp;
-                        }
-                    });
-            });
+          .flatMap(i -> IntStream.range(i + 1, n - i))
+          .forEach(j -> {
+              if (arr[j - 1] > arr[j]) {
+                  int temp = arr[j];
+                  arr[j] = arr[j - 1];
+                  arr[j - 1] = temp;
+              }
+          });
     }
 
-    public void optimizedBubbleSort(Integer[] arr) {
+    void optimizedBubbleSort(Integer[] arr) {
         int i = 0, n = arr.length;
         boolean swapNeeded = true;
         while (i < n - 1 && swapNeeded) {
@@ -37,5 +35,4 @@ public class BubbleSort {
             i++;
         }
     }
-
 }

rxjava/src/main/java/com/baeldung/rxjava/ComputeFunction.java

@@ -1,4 +1,4 @@
-package com.baelding.rxjava;
+package com.baeldung.rxjava;
 
 import rx.Observable;
 

rxjava/src/main/java/com/baeldung/rxjava/ConnectableObservableImpl.java

@@ -1,4 +1,4 @@
-package com.baelding.rxjava;
+package com.baeldung.rxjava;
 
 import rx.Observable;
 import rx.observables.ConnectableObservable;

rxjava/src/main/java/com/baeldung/rxjava/ObservableImpl.java

@@ -1,4 +1,4 @@
-package com.baelding.rxjava;
+package com.baeldung.rxjava;
 
 import rx.Observable;
 import rx.observables.BlockingObservable;
@@ -8,13 +8,13 @@ import java.util.List;
 
 public class ObservableImpl {
 
-    static Integer[] numbers = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+    private static Integer[] numbers = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
 
-    static String[] letters = {"a", "b", "c", "d", "e", "f", "g", "h", "i"};
-    static String[] titles = {"title"};
-    public static List<String> titleList = Arrays.asList(titles);
+    private static String[] letters = {"a", "b", "c", "d", "e", "f", "g", "h", "i"};
+    private static String[] titles = {"title"};
+    private static List<String> titleList = Arrays.asList(titles);
 
-    public static Observable<String> getTitle() {
+    static Observable<String> getTitle() {
         return Observable.from(titleList);
     }
 

rxjava/src/main/java/com/baeldung/rxjava/ResourceManagement.java

@@ -1,4 +1,4 @@
-package com.baelding.rxjava;
+package com.baeldung.rxjava;
 
 import rx.Observable;
 

rxjava/src/main/java/com/baeldung/rxjava/SingleImpl.java

@@ -1,4 +1,4 @@
-package com.baelding.rxjava;
+package com.baeldung.rxjava;
 
 import rx.Observable;
 import rx.Single;

rxjava/src/main/java/com/baeldung/rxjava/SubjectImpl.java

@@ -1,14 +1,14 @@
-package com.baelding.rxjava;
+package com.baeldung.rxjava;
 
 import rx.Observer;
 import rx.subjects.PublishSubject;
 
 public class SubjectImpl {
 
-    public static Integer subscriber1 = 0;
-    public static Integer subscriber2 = 0;
+    static Integer subscriber1 = 0;
+    static Integer subscriber2 = 0;
 
-    public static Integer subjectMethod() {
+    private static Integer subjectMethod() {
         PublishSubject<Integer> subject = PublishSubject.create();
 
         subject.subscribe(getFirstObserver());
@@ -25,7 +25,7 @@ public class SubjectImpl {
     }
 
 
-    public static Observer<Integer> getFirstObserver() {
+    static Observer<Integer> getFirstObserver() {
         return new Observer<Integer>() {
 
             @Override
@@ -46,7 +46,7 @@ public class SubjectImpl {
         };
     }
 
-    public static Observer<Integer> getSecondObserver() {
+    static Observer<Integer> getSecondObserver() {
         return new Observer<Integer>() {
 
             @Override

rxjava/src/main/java/com/baeldung/rxjava/jdbc/Connector.java

@@ -5,9 +5,9 @@ import com.github.davidmoten.rx.jdbc.ConnectionProviderFromUrl;
 
 class Connector {
 
-    static final String DB_CONNECTION = "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1";
-    static final String DB_USER = "";
-    static final String DB_PASSWORD = "";
+    private static final String DB_CONNECTION = "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1";
+    private static final String DB_USER = "";
+    private static final String DB_PASSWORD = "";
 
     static final ConnectionProvider connectionProvider = new ConnectionProviderFromUrl(DB_CONNECTION, DB_USER, DB_PASSWORD);
 }

rxjava/src/main/java/com/baeldung/rxjava/operator/ToCleanString.java

@@ -1,4 +1,4 @@
-package com.baelding.rxjava.operator;
+package com.baeldung.rxjava.operator;
 
 import rx.Observable.Operator;
 import rx.Subscriber;

rxjava/src/main/java/com/baeldung/rxjava/operator/ToLength.java

@@ -1,4 +1,4 @@
-package com.baelding.rxjava.operator;
+package com.baeldung.rxjava.operator;
 
 import rx.Observable;
 import rx.Observable.Transformer;

rxjava/src/test/java/com/baeldung/rxjava/ObservableTest.java

@@ -3,7 +3,7 @@ package com.baeldung.rxjava;
 import org.junit.Test;
 import rx.Observable;
 
-import static com.baelding.rxjava.ObservableImpl.getTitle;
+import static com.baeldung.rxjava.ObservableImpl.getTitle;
 import static junit.framework.Assert.assertTrue;
 
 public class ObservableTest {

rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java

@@ -10,8 +10,8 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import static com.baelding.rxjava.operator.ToCleanString.toCleanString;
-import static com.baelding.rxjava.operator.ToLength.toLength;
+import static com.baeldung.rxjava.operator.ToCleanString.toCleanString;
+import static com.baeldung.rxjava.operator.ToLength.toLength;
 import static org.hamcrest.Matchers.hasItems;
 import static org.hamcrest.Matchers.hasSize;
 import static org.hamcrest.Matchers.notNullValue;

rxjava/src/test/java/com/baeldung/rxjava/SchedulersLiveTest.java

@@ -21,7 +21,7 @@ import static org.hamcrest.Matchers.hasItems;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
-public class SchedulersTest {
+public class SchedulersLiveTest {
     private String result = "";
     private String result1 = "";
     private String result2 = "";

rxjava/src/test/java/com/baeldung/rxjava/SubjectTest.java

@@ -1,6 +1,5 @@
 package com.baeldung.rxjava;
 
-import com.baelding.rxjava.SubjectImpl;
 import org.junit.Test;
 import rx.subjects.PublishSubject;
 

rxjava/src/test/java/com/baeldung/rxjava/jdbc/BasicQueryTypesIntegrationTest.java

@@ -18,25 +18,25 @@ public class BasicQueryTypesIntegrationTest {
     private ConnectionProvider connectionProvider = Connector.connectionProvider;
     private Database db = Database.from(connectionProvider);
 
-    private Observable<Integer> create, insert1, insert2, insert3, update, delete = null;
+    private Observable<Integer> create;
 
     @Test
     public void whenCreateTableAndInsertRecords_thenCorrect() {
         create = db.update("CREATE TABLE IF NOT EXISTS EMPLOYEE(id int primary key, name varchar(255))")
           .count();
-        insert1 = db.update("INSERT INTO EMPLOYEE(id, name) VALUES(1, 'John')")
+        Observable<Integer> insert1 = db.update("INSERT INTO EMPLOYEE(id, name) VALUES(1, 'John')")
           .dependsOn(create)
           .count();
-        update = db.update("UPDATE EMPLOYEE SET name = 'Alan' WHERE id = 1")
+        Observable<Integer> update = db.update("UPDATE EMPLOYEE SET name = 'Alan' WHERE id = 1")
           .dependsOn(create)
           .count();
-        insert2 = db.update("INSERT INTO EMPLOYEE(id, name) VALUES(2, 'Sarah')")
+        Observable<Integer> insert2 = db.update("INSERT INTO EMPLOYEE(id, name) VALUES(2, 'Sarah')")
           .dependsOn(create)
           .count();
-        insert3 = db.update("INSERT INTO EMPLOYEE(id, name) VALUES(3, 'Mike')")
+        Observable<Integer> insert3 = db.update("INSERT INTO EMPLOYEE(id, name) VALUES(3, 'Mike')")
           .dependsOn(create)
           .count();
-        delete = db.update("DELETE FROM EMPLOYEE WHERE id = 2")
+        Observable<Integer> delete = db.update("DELETE FROM EMPLOYEE WHERE id = 2")
           .dependsOn(create)
           .count();
         List<String> names = db.select("select name from EMPLOYEE where id < ?")