Implement Java Collections & Streams + Refactoring of packages

.gitignore

@@ -11,3 +11,4 @@ Personal/Test Driven Development/Hello World/.settings/org.eclipse.core.resource
 Personal/Test Driven Development/Hello World/.settings/org.eclipse.jdt.apt.core.prefs
 Personal/Test Driven Development/Hello World/.settings/org.eclipse.jdt.core.prefs
 Personal/Test Driven Development/Hello World/.settings/org.eclipse.m2e.core.prefs
+/.idea/

Java Streams/src/EnterTheCollector.java

@@ -0,0 +1,26 @@
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.util.Comparator.comparingInt;
+
+public class EnterTheCollector {
+    public static void main(String[] args) {
+        StreamProduct door = new StreamProduct(1, "Wooden Door", 35);
+        StreamProduct floorPanel = new StreamProduct(2, "Floor Panel", 25);
+        StreamProduct window = new StreamProduct(3, "Glass Window", 10);
+
+        List<StreamProduct> streamProducts = new ArrayList<>();
+        streamProducts.add(door);
+        streamProducts.add(floorPanel);
+        streamProducts.add(window);
+        streamProducts.add(floorPanel);
+        streamProducts.add(window);
+        streamProducts.add(floorPanel);
+
+        streamProducts
+                .stream()
+                .filter(product -> product.getWeight() < 30)
+                .sorted(comparingInt(StreamProduct::getWeight))
+                .forEach(System.out::println);
+    }
+}

Java Streams/src/StreamProduct.java

@@ -0,0 +1,47 @@
+import java.util.Objects;
+
+public class StreamProduct {
+    private final int id;
+    private final String name;
+    private final int weight;
+
+    public StreamProduct(final int id, final String name, final int weight) {
+        this.id = id;
+        this.name = name;
+        this.weight = weight;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getWeight() {
+        return weight;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String toString() {
+        return "Product{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", weight=" + weight +
+                '}';
+    }
+
+    public boolean equals(final Object o) {
+        if (!(o instanceof StreamProduct)) return false;
+
+        final StreamProduct streamProduct = (StreamProduct) o;
+
+        return Objects.equals(id, streamProduct.id)
+                && Objects.equals(weight, streamProduct.weight)
+                && Objects.equals(name, streamProduct.name);
+    }
+
+    public int hashCode() {
+        return Objects.hash(id, name, weight);
+    }
+}

Java Streams/src/StreamProducts.java

@@ -0,0 +1,43 @@
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.util.Comparator.comparingInt;
+
+public class StreamProducts {
+    public static void main(String[] args) {
+        StreamProduct door = new StreamProduct(1, "Wooden Door", 35);
+        StreamProduct floorPanel = new StreamProduct(2, "Floor Panel", 25);
+        StreamProduct window = new StreamProduct(3, "Glass Window", 10);
+
+        List<StreamProduct> streamProducts = new ArrayList<>();
+        streamProducts.add(door);
+        streamProducts.add(floorPanel);
+        streamProducts.add(window);
+        streamProducts.add(floorPanel);
+        streamProducts.add(window);
+
+        namesOfLightProductsWeightSortedLoop(streamProducts);
+        namesOfLightProductsWeightSortedLoopStreamed(streamProducts);
+    }
+
+    private static void namesOfLightProductsWeightSortedLoopStreamed(List<StreamProduct> streamProducts) {
+
+    }
+
+    private static void namesOfLightProductsWeightSortedLoop(
+            List<StreamProduct> streamProducts) {
+        List<StreamProduct> lightStreamProducts = new ArrayList<>();
+
+        for (StreamProduct streamProduct : streamProducts) {
+            if (streamProduct.getWeight() < 30) {
+                lightStreamProducts.add(streamProduct);
+            }
+        }
+
+        lightStreamProducts.sort(comparingInt(StreamProduct::getWeight));
+
+        for (StreamProduct streamProduct : lightStreamProducts) {
+            System.out.println(streamProduct.getName());
+        }
+    }
+}

Personal/Test Driven Development/Hello World/src/main/java/hello/world/Greeting.java

@@ -1,4 +1,4 @@
-package hello.world;
+package main.java.hello.world;
 
 public class Greeting {
     String message;

Personal/Test Driven Development/Hello World/src/main/java/hello/world/HelloWorld.java

@@ -1,4 +1,4 @@
-package hello.world;
+package main.java.hello.world;
 
 /**
  * Hello world!

Personal/Test Driven Development/Hello World/src/test/java/hello/world/HelloWorldTest.java

@@ -1,8 +1,10 @@
-package hello.world;
+package test.java.hello.world;
 
-import static org.junit.Assert.assertEquals;
+import main.java.hello.world.Greeting;
 import org.junit.Test;
 
+import static org.junit.Assert.assertEquals;
+
 /**
  * Unit test for simple App.
  */