reorganization

Author: wesleyegberto

.gitignore

@@ -6,6 +6,7 @@
 .idea/
 target/
 output/
+bin/
 *.jar
 *.war
 *.ear

README.md

@@ -37,7 +37,7 @@ A project to explore more about the new features of Java 8, 9, ...
   * Null I/O
 
 * [Java 12](java-12/)
-  * Switch expression (preview 1)
+  * Switch expression (preview)
   * Compact Number Format
   * Collectors improvements
   * CompletableFuture improvements
@@ -46,7 +46,7 @@ A project to explore more about the new features of Java 8, 9, ...
 
 * [Java 13](java-13/)
   * Switch expression (preview 2)
-  * Text blocks
+  * Text blocks (preview)
   * String API updates
   * NIO updates
   * Socket and ServerSocket reimplementation (Project Loom)
@@ -56,10 +56,21 @@ A project to explore more about the new features of Java 8, 9, ...
 * [Java 14](java-14/) (May 17th, 2020)
   * Switch expression (standard)
   * Pattern matching for `instanceof` (preview)
-  * Text blocks improvements
+  * Text blocks improvements (preview 2)
   * Records (preview)
   * Helpful NullPointerExceptions
   * Packaging tool
   * JFR even streaming
 
-* [Java 15](java-15/)
+* [Java 15](java-15/) (GA - Sep, 2020)
+  * Sealed classes (preview)
+  * Hidden classes
+  * DatagramSocket reimplementation
+  * Pattern matching for `instanceof` (preview 2)
+  * Records (preview 2)
+  * Foreign-Memory Access API (incubator)
+
+## Helpful Links
+
+* [Considerations Bumping Java EE](https://vorozco.com/blog/2020/2020-08-21-considerations-bumping-javaee.html)
+* [The Role of Preview Features in Java and Beyond](https://blogs.oracle.com/javamagazine/the-role-of-previews-in-java-14-java-15-java-16-and-beyond)

java-10/CollectionsCopyOf.java

@@ -0,0 +1,21 @@
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+public class CollectionsCopyOf {
+	public static void main(String[] args) {
+		List<String> muttableList = Arrays.asList("New", "Method", "To", "Copy");
+
+		// Copy methods
+		List<String> immutableList = List.copyOf(muttableList);
+		immutableList.forEach(System.out::println);
+
+		Set<String> immutableSet = Set.copyOf(muttableList);
+		immutableSet.forEach(System.out::println);
+
+		Map<String, String> immutableMap = Map.copyOf(Map.of("k1", "v1", "k2", "v2"));
+		immutableMap.forEach((key, value) -> System.out.println(key + " = " + value));
+
+	}
+}

java-10/ProcessTest.java

@@ -0,0 +1,10 @@
+import java.lang.management.ManagementFactory;
+import java.lang.management.RuntimeMXBean;
+
+public class ProcessTest {
+	public static void main(String[] args) {
+		final RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
+		final long pid = runtime.getPid();
+		System.out.println("Process ID is: " + pid);
+	}
+}

java-10/README.md

@@ -1,5 +1,10 @@
 # Java 10
 
+```sh
+sh build.sh
+java -cp bin <ClassName>
+```
+
 ## Features
 
 ### Language

java-10/StreamToUnmodifiableCollections.java

@@ -0,0 +1,18 @@
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+public class StreamToUnmodifiableCollections {
+	public static void main(String[] args) {
+		List<String> list = List.of("Testing", "Immutable", "List", "From", "Stream");
+
+		List<String> immutableList = list.stream()
+				.collect(Collectors.toUnmodifiableList());
+		immutableList.forEach(System.out::println);
+
+		Map<String, Integer> wordsLengths = list.stream()
+				.collect(Collectors.toUnmodifiableMap(Function.identity(), word -> word.length()));
+		wordsLengths.forEach((word, length) -> System.out.println(word + " -> " + length + " letters"));
+	}
+}

java-10/build.sh

@@ -0,0 +1,2 @@
+[[ -f bin ]] && mkdir bin
+javac *.java -d ./bin