java8features - new java 8 features

slavisa-baeldung · slavisa-baeldung · commit f972513e2b86 · 2016-05-24T17:41:20.000+02:00
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/Address.java b/core-java-8/src/main/java/com/baeldung/java_8_features/Address.java
@@ -1,8 +1,5 @@
 package com.baeldung.java_8_features;
 
-/**
- * Created by Alex Vengr
- */
 public class Address {
 
     private String street;
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/CustomException.java b/core-java-8/src/main/java/com/baeldung/java_8_features/CustomException.java
@@ -1,7 +1,4 @@
 package com.baeldung.java_8_features;
 
-/**
- * Created by Alex Vengr
- */
 public class CustomException extends RuntimeException {
 }
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/Detail.java b/core-java-8/src/main/java/com/baeldung/java_8_features/Detail.java
@@ -3,9 +3,6 @@
 import java.util.Arrays;
 import java.util.List;
 
-/**
- * Created by Alex Vengrov
- */
 public class Detail {
 
     private static final List<String> PARTS = Arrays.asList("turbine", "pump");
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/OptionalAddress.java b/core-java-8/src/main/java/com/baeldung/java_8_features/OptionalAddress.java
@@ -2,9 +2,6 @@
 
 import java.util.Optional;
 
-/**
- * Created by Alex Vengrov
- */
 public class OptionalAddress {
 
     private String street;
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/OptionalUser.java b/core-java-8/src/main/java/com/baeldung/java_8_features/OptionalUser.java
@@ -2,9 +2,6 @@
 
 import java.util.Optional;
 
-/**
- * Created by Alex Vengrov
- */
 public class OptionalUser {
 
     private OptionalAddress address;
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/User.java b/core-java-8/src/main/java/com/baeldung/java_8_features/User.java
@@ -2,9 +2,6 @@
 
 import java.util.Optional;
 
-/**
- * Created by Alex Vengrov
- */
 public class User {
 
     private String name;
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/Vehicle.java b/core-java-8/src/main/java/com/baeldung/java_8_features/Vehicle.java
@@ -1,8 +1,5 @@
 package com.baeldung.java_8_features;
 
-/**
- * Created by Alex Vengrov
- */
 public interface Vehicle {
 
     void moveTo(long altitude, long longitude);
diff --git a/core-java-8/src/main/java/com/baeldung/java_8_features/VehicleImpl.java b/core-java-8/src/main/java/com/baeldung/java_8_features/VehicleImpl.java
@@ -1,8 +1,5 @@
 package com.baeldung.java_8_features;
 
-/**
- * Created by 1 on 15.05.2016.
- */
 public class VehicleImpl implements  Vehicle {
 
     @Override
diff --git a/core-java-8/src/test/java/com/baeldung/java8/Java8DefaultStaticIntefaceMethodsTest.java b/core-java-8/src/test/java/com/baeldung/java8/Java8DefaultStaticIntefaceMethodsTest.java
@@ -0,0 +1,27 @@
+package com.baeldung.java8;
+
+import com.baeldung.java_8_features.Vehicle;
+import com.baeldung.java_8_features.VehicleImpl;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class Java8DefaultStaticIntefaceMethodsTest {
+
+    @Test
+    public void callStaticInterfaceMethdosMethods_whenExpectedResults_thenCorrect() {
+        Vehicle vehicle = new VehicleImpl();
+        String overview = vehicle.getOverview();
+        long[] startPosition = vehicle.startPosition();
+
+        assertEquals(overview, "ATV made by N&F Vehicles");
+        assertEquals(startPosition[0], 23);
+        assertEquals(startPosition[1], 15);
+    }
+
+    @Test
+    public void callDefaultInterfaceMethods_whenExpectedResults_thenCorrect() {
+        String producer = Vehicle.producer();
+        assertEquals(producer, "N&F Vehicles");
+    }
+}
diff --git a/core-java-8/src/test/java/com/baeldung/java8/Java8Features.java b/core-java-8/src/test/java/com/baeldung/java8/Java8Features.java
diff --git a/core-java-8/src/test/java/com/baeldung/java8/Java8MethodReferenceTest.java b/core-java-8/src/test/java/com/baeldung/java8/Java8MethodReferenceTest.java
@@ -0,0 +1,67 @@
+package com.baeldung.java8;
+
+import com.baeldung.java_8_features.User;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class Java8MethodReferenceTest {
+
+    private List<String> list;
+
+    @Before
+    public void init() {
+        list = new ArrayList<>();
+        list.add("One");
+        list.add("OneAndOnly");
+        list.add("Derek");
+        list.add("Change");
+        list.add("factory");
+        list.add("justBefore");
+        list.add("Italy");
+        list.add("Italy");
+        list.add("Thursday");
+        list.add("");
+        list.add("");
+    }
+
+    @Test
+    public void checkStaticMethodReferences_whenWork_thenCorrect() {
+
+        List<User> users = new ArrayList<>();
+        users.add(new User());
+        users.add(new User());
+        boolean isReal = users.stream().anyMatch(u -> User.isRealUser(u));
+        boolean isRealRef = users.stream().anyMatch(User::isRealUser);
+        assertTrue(isReal);
+        assertTrue(isRealRef);
+    }
+
+    @Test
+    public void checkInstanceMethodReferences_whenWork_thenCorrect() {
+        User user = new User();
+        boolean isLegalName = list.stream().anyMatch(user::isLegalName);
+        assertTrue(isLegalName);
+    }
+
+    @Test
+    public void checkParticularTypeReferences_whenWork_thenCorrect() {
+        long count = list.stream().filter(String::isEmpty).count();
+        assertEquals(count, 2);
+    }
+
+    @Test
+    public void checkConstructorReferences_whenWork_thenCorrect() {
+        Stream<User> stream = list.stream().map(User::new);
+        List<User> userList = stream.collect(Collectors.toList());
+        assertEquals(userList.size(), list.size());
+        assertTrue(userList.get(0) instanceof User);
+    }
+}
diff --git a/core-java-8/src/test/java/com/baeldung/java8/Java8OptionalTest.java b/core-java-8/src/test/java/com/baeldung/java8/Java8OptionalTest.java
diff --git a/core-java-8/src/test/java/com/baeldung/java8/Java8StreamsTest.java b/core-java-8/src/test/java/com/baeldung/java8/Java8StreamsTest.java

Original file line number	Diff line number	Diff line change
`@@ -1,7 +1,4 @@`
`1`	`1`	`package com.baeldung.java_8_features;`
`2`	`2`
`3`		`-/**`
`4`		`- * Created by Alex Vengr`
`5`		`- */`
`6`	`3`	`public class CustomException extends RuntimeException {`
`7`	`4`	`}`