Class SummaryStatistics

README.md

@@ -80,6 +80,10 @@ This repository contains Java examples that are designed to track and document t
     * Functional Interfaces
     * Optional
     * Method References
+  * API Improvements
+    * `java.lang.Object.java.util.IntSummaryStatistics`
+    * `java.lang.Object.java.util.LongSummaryStatistics`
+    * `java.lang.Object.java.util.DoubleSummaryStatistics`
 
 * [Java 7](java-7/) (September, 2011)
 

java-8/pom.xml

@@ -7,6 +7,18 @@
         <groupId>com.ibrahimatay</groupId>
         <version>1.0-SNAPSHOT</version>
     </parent>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>9</source>
+                    <target>9</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>java-8</artifactId>

java-8/src/main/java/NewSummaryStatisticClasses.java

@@ -0,0 +1,31 @@
+import java.util.IntSummaryStatistics;
+import java.util.List;
+
+public class NewSummaryStatisticClasses {
+    public static void main(String[] args) {
+        // Class IntSummaryStatistics
+        // https://docs.oracle.com/javase%2F8%2Fdocs%2Fapi%2F%2F/java/util/IntSummaryStatistics.html
+
+        // LongSummaryStatistics
+        // https://docs.oracle.com/javase/8/docs/api/java/util/LongSummaryStatistics.html
+
+        // DoubleSummaryStatistics
+        // https://docs.oracle.com/javase/8/docs/api/java/util/DoubleSummaryStatistics.html
+
+        List<Integer> integers = List.of(154, 65, 456, 765,23456,34565432);
+
+        IntSummaryStatistics intSummaryStatistics = new IntSummaryStatistics();
+        integers.stream().forEach(intSummaryStatistics::accept);
+
+        System.out.println(intSummaryStatistics);
+        // IntSummaryStatistics{count=6, sum=34590328, min=65, average=5765054.666667, max=34565432}
+
+        System.out.printf("Max: %d, Min: %d, Ave: %f, Sum: %d",
+                intSummaryStatistics.getMax(),
+                intSummaryStatistics.getMin(),
+                intSummaryStatistics.getAverage(),
+                intSummaryStatistics.getSum());
+
+        // Max: 34565432, Min: 65, Ave: 5765054.666667, Sum: 34590328
+    }
+}