From 8214c8dd97a38b06959aae00ca678b521c4abef5 Mon Sep 17 00:00:00 2001
From: Grzegorz Piwowarek <gpiwowarek@gmail.com>
Date: Wed, 2 Aug 2017 00:05:37 +0200
Subject: [PATCH 1/2] Refactor

---
 .../main/java/com/baelding/rxjava/operator/toLength.java | 8 +-------
 .../baeldung/rxjava/RxJavaCustomOperatorUnitTest.java    | 9 +--------
 2 files changed, 2 insertions(+), 15 deletions(-)

diff --git a/rxjava/src/main/java/com/baelding/rxjava/operator/toLength.java b/rxjava/src/main/java/com/baelding/rxjava/operator/toLength.java
index 47398ddcb8..fa997b563d 100644
--- a/rxjava/src/main/java/com/baelding/rxjava/operator/toLength.java
+++ b/rxjava/src/main/java/com/baelding/rxjava/operator/toLength.java
@@ -11,12 +11,6 @@ public class toLength implements Transformer<String, Integer> {
 
     @Override
     public Observable<Integer> call(Observable<String> source) {
-
-        return source.map(new Func1<String, Integer>() {
-            @Override
-            public Integer call(String str) {
-                return str.length();
-            }
-        });
+        return source.map(String::length);
     }
 }
\ No newline at end of file
diff --git a/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java b/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java
index 0cc458c414..99ac0351be 100644
--- a/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java
+++ b/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java
@@ -96,14 +96,7 @@ public class RxJavaCustomOperatorUnitTest {
 
     @Test
     public void whenUseFunctionTransformer_thenSuccess() {
-        final Transformer<String, Integer> toLengthFn = source -> {
-            return source.map(new Func1<String, Integer>() {
-                @Override
-                public Integer call(String str) {
-                    return str.length();
-                }
-            });
-        };
+        final Transformer<String, Integer> toLengthFn = source -> source.map(String::length);
 
         final List<Integer> results = new ArrayList<Integer>();
         Observable.from(Arrays.asList("apple", "orange"))

From 4ff0768feacf43f622d9e79720c17647a2b18361 Mon Sep 17 00:00:00 2001
From: Grzegorz Piwowarek <gpiwowarek@gmail.com>
Date: Wed, 2 Aug 2017 00:06:14 +0200
Subject: [PATCH 2/2] Refactor

---
 .../operator/{cleanString.java => CleanString.java}      | 4 ++--
 .../rxjava/operator/{toLength.java => ToLength.java}     | 4 ++--
 .../baeldung/rxjava/RxJavaCustomOperatorUnitTest.java    | 9 ++++-----
 3 files changed, 8 insertions(+), 9 deletions(-)
 rename rxjava/src/main/java/com/baelding/rxjava/operator/{cleanString.java => CleanString.java} (91%)
 rename rxjava/src/main/java/com/baelding/rxjava/operator/{toLength.java => ToLength.java} (75%)

diff --git a/rxjava/src/main/java/com/baelding/rxjava/operator/cleanString.java b/rxjava/src/main/java/com/baelding/rxjava/operator/CleanString.java
similarity index 91%
rename from rxjava/src/main/java/com/baelding/rxjava/operator/cleanString.java
rename to rxjava/src/main/java/com/baelding/rxjava/operator/CleanString.java
index 8ae8d25cd7..9abdd7e07d 100644
--- a/rxjava/src/main/java/com/baelding/rxjava/operator/cleanString.java
+++ b/rxjava/src/main/java/com/baelding/rxjava/operator/CleanString.java
@@ -3,9 +3,9 @@ package com.baelding.rxjava.operator;
 import rx.Observable.Operator;
 import rx.Subscriber;
 
-public class cleanString implements Operator<String, String> {
+public class CleanString implements Operator<String, String> {
 
-    public cleanString() {
+    public CleanString() {
         super();
     }
 
diff --git a/rxjava/src/main/java/com/baelding/rxjava/operator/toLength.java b/rxjava/src/main/java/com/baelding/rxjava/operator/ToLength.java
similarity index 75%
rename from rxjava/src/main/java/com/baelding/rxjava/operator/toLength.java
rename to rxjava/src/main/java/com/baelding/rxjava/operator/ToLength.java
index fa997b563d..ea954aa71c 100644
--- a/rxjava/src/main/java/com/baelding/rxjava/operator/toLength.java
+++ b/rxjava/src/main/java/com/baelding/rxjava/operator/ToLength.java
@@ -4,8 +4,8 @@ import rx.Observable;
 import rx.Observable.Transformer;
 import rx.functions.Func1;
 
-public class toLength implements Transformer<String, Integer> {
-    public toLength() {
+public class ToLength implements Transformer<String, Integer> {
+    public ToLength() {
         super();
     }
 
diff --git a/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java b/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java
index 99ac0351be..ca1169486e 100644
--- a/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java
+++ b/rxjava/src/test/java/com/baeldung/rxjava/RxJavaCustomOperatorUnitTest.java
@@ -15,10 +15,9 @@ import rx.Observable;
 import rx.Observable.Operator;
 import rx.Observable.Transformer;
 import rx.Subscriber;
-import rx.functions.Func1;
 
-import com.baelding.rxjava.operator.cleanString;
-import com.baelding.rxjava.operator.toLength;
+import com.baelding.rxjava.operator.CleanString;
+import com.baelding.rxjava.operator.ToLength;
 
 public class RxJavaCustomOperatorUnitTest {
 
@@ -28,7 +27,7 @@ public class RxJavaCustomOperatorUnitTest {
         final List<String> results = new ArrayList<String>();
 
         final Observable<String> observable = Observable.from(list)
-            .lift(new cleanString());
+            .lift(new CleanString());
 
         // when
         observable.subscribe(results::add);
@@ -45,7 +44,7 @@ public class RxJavaCustomOperatorUnitTest {
         final List<Integer> results = new ArrayList<Integer>();
 
         final Observable<Integer> observable = Observable.from(list)
-            .compose(new toLength());
+            .compose(new ToLength());
 
         // when
         observable.subscribe(results::add);