Merge pull request eugenp#6183 from MherBaghinyan/BAEL-2564

Bael 2564

Author: eric-martin

core-java-collections-list/pom.xml

@@ -36,6 +36,22 @@
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
+
+        <dependency>
+            <groupId>net.sf.trove4j</groupId>
+            <artifactId>trove4j</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+        <dependency>
+            <groupId>it.unimi.dsi</groupId>
+            <artifactId>fastutil</artifactId>
+            <version>8.1.0</version>
+        </dependency>
+        <dependency>
+            <groupId>colt</groupId>
+            <artifactId>colt</artifactId>
+            <version>1.2.0</version>
+        </dependency>
     </dependencies>
 
     <properties>

core-java-collections-list/src/main/java/com/baeldung/list/primitive/PrimitiveCollections.java

@@ -0,0 +1,52 @@
+package com.baeldung.list.primitive;
+
+import com.google.common.primitives.ImmutableIntArray;
+import com.google.common.primitives.Ints;
+import gnu.trove.list.array.TIntArrayList;
+import it.unimi.dsi.fastutil.ints.IntArrayList;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.OptionalDouble;
+import java.util.function.IntPredicate;
+import java.util.stream.IntStream;
+
+public class PrimitiveCollections {
+
+    public static void main(String[] args) {
+
+        int[] primitives = new int[] {5, 10, 0, 2, -8};
+
+        guavaPrimitives(primitives);
+
+        intStream(primitives);
+
+        TIntArrayList tList = new TIntArrayList(primitives);
+
+        cern.colt.list.IntArrayList coltList = new cern.colt.list.IntArrayList(primitives);
+
+        IntArrayList fastUtilList = new IntArrayList(primitives);
+
+        System.out.println(tList);
+
+        System.out.println(coltList);
+
+        System.out.println(fastUtilList);
+    }
+
+    private static void intStream(int[] primitives) {
+
+        IntStream stream = IntStream.of(5, 10, 0, 2, -8);
+
+        IntStream newStream = IntStream.of(primitives);
+
+        OptionalDouble average = stream.filter(i -> i > 0).average();
+    }
+
+
+    private static void guavaPrimitives(int[] primitives) {
+
+        ImmutableIntArray immutableIntArray = ImmutableIntArray.builder().addAll(primitives).build();
+        System.out.println(immutableIntArray);
+    }
+}