JDK 20 -> JDK 21

Author: LOG-INFO

README.md

@@ -1,8 +1,8 @@
 ## Version Compatibility - [Gradle - Java - Kotlin](https://docs.gradle.org/current/userguide/compatibility.html)
 
-- `Gradle 8.0.2`
-- `Kotlin 1.9.0-Beta`
-- `JVM 20`
+- `Gradle 8.2.1`
+- `Kotlin 1.9.20-Beta2`
+- `JVM 21`
 - `Spring Boot 3.1.0`
 - `Apache Tomcat 10.1.8` or `Netty 4.1.92.Final`
 
@@ -16,7 +16,6 @@
 -XX:NativeMemoryTracking=detail
 -XX:Tier3CompileThreshold=100
 -XX:Tier4CompileThreshold=100
---enable-preview
 ```
 
 ## 비교

build.gradle.kts

@@ -2,14 +2,14 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import org.springframework.boot.gradle.tasks.bundling.BootJar
 
 object DependencyVersions {
-    const val KOTLIN_VERSION = "1.9.0-Beta"
+    const val KOTLIN_VERSION = "1.9.20-Beta2"
 }
 
 plugins {
     id("org.springframework.boot") version "3.1.0"
     id("io.spring.dependency-management") version "1.1.0"
-    kotlin("jvm") version "1.9.0-Beta"
-    kotlin("plugin.spring") version "1.9.0-Beta"
+    kotlin("jvm") version "1.9.20-Beta2"
+    kotlin("plugin.spring") version "1.9.20-Beta2"
 }
 
 allprojects {
@@ -38,13 +38,13 @@ allprojects {
     }
 
     kotlin {
-        jvmToolchain(20)
+        jvmToolchain(21)
 
     }
 
     tasks.withType<KotlinCompile>().all {
         kotlinOptions {
-            jvmTarget = "20"
+            jvmTarget = "21"
         }
     }
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

virtual-thread-api/build.gradle.kts

@@ -1,3 +1,7 @@
+java {
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+}
 dependencies {
     implementation(project(":domain"))
     implementation(project(":core"))