From 350cb6ce22255c889756fd4243a8519b7ebb3e2f Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Thu, 21 May 2026 18:32:40 +0000
Subject: [PATCH] Upgrade from Java 8 to Java 11

- Update maven-compiler-plugin source/target/release from 1.9 to 11
- Bump maven-compiler-plugin version from 3.1 to 3.8.1
- Add maven.compiler.source and maven.compiler.target properties
- Update README.md to reference JDK 11+ and Adoptium

Co-Authored-By: derek.wu <derekwu35@gmail.com>
---
 README.md | 13 +++++--------
 pom.xml   |  9 ++++++---
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/README.md b/README.md
index 9ee848d5..0b8ae3b1 100644
--- a/README.md
+++ b/README.md
@@ -29,17 +29,14 @@ The source code for all examples can be found in the directory [src/main/java/la
 * Appendix D: Lambdas and JVM bytecode
 We will update the repository as we update the book. Stay tuned!
 
-### Make sure to have JDK8 installed
-The latest binary can be found here: http://www.oracle.com/technetwork/java/javase/overview/java8-2100321.html
+### Make sure to have JDK 11+ installed
+The latest binary can be found here: https://adoptium.net/temurin/releases/?version=11
 
 $ java -version
 
-java version "1.8.0_05"
-Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
-Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)
-
-
-You can download a preview version here: https://jdk8.java.net/
+openjdk version "11.0.x"
+OpenJDK Runtime Environment (build 11.0.x+x)
+OpenJDK 64-Bit Server VM (build 11.0.x+x, mixed mode)
 
 ### Compile/Run the examples
 Using maven:
diff --git a/pom.xml b/pom.xml
index 10e5035e..360ddfdd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,6 +10,8 @@
     
     <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+      <maven.compiler.source>11</maven.compiler.source>
+      <maven.compiler.target>11</maven.compiler.target>
     </properties>
 
   <dependencies>
@@ -35,10 +37,11 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.1</version>
+        <version>3.8.1</version>
         <configuration>
-          <source>1.9</source>
-          <target>1.9</target>
+          <source>11</source>
+          <target>11</target>
+          <release>11</release>
         </configuration>
       </plugin>
       <plugin>