feat(build): bump to Java 25 and verify Spigot 1.21–26.2 compatibility

.github/workflows/gradle.yml

@@ -21,10 +21,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Set up JDK 21
+      - name: Set up JDK 25
         uses: actions/setup-java@v3
         with:
-          java-version: '21'
+          java-version: '25'
           distribution: 'temurin'
 
       - name: Setup Gradle

README.md

@@ -1,8 +1,8 @@
 # ⏳ Advanced PlayTime Plugin
 
 [![Build Status](https://github.com/imDMK/AdvancedPlayTime/actions/workflows/gradle.yml/badge.svg)](https://github.com/imDMK/AdvancedPlayTime/actions/workflows/gradle.yml)
-![JDK](https://img.shields.io/badge/JDK-1.21-blue.svg)
-![Supported versions](https://img.shields.io/badge/Minecraft-1.21--1.21.11-green.svg)
+![JDK](https://img.shields.io/badge/JDK-25-blue.svg)
+![Supported versions](https://img.shields.io/badge/Minecraft-1.21--26.2-green.svg)
 [![SpigotMC](https://img.shields.io/badge/SpigotMC-yellow.svg)](https://www.spigotmc.org/resources/%E2%8F%B0%EF%B8%8F-advancedplaytime-1-21-1-21-10.130458/)
 [![Modrinth](https://img.shields.io/badge/Modrinth-1bd96a.svg)](https://modrinth.com/plugin/advancedplaytime)
 [![bStats](https://img.shields.io/badge/bStats-00695c)](https://bstats.org/plugin/bukkit/PlayTime/19362)
@@ -13,6 +13,10 @@
 
 ---
 
+### 📦 Requirements
+- **Java 25** or newer on the server.
+- **Spigot / Paper 1.21 – 26.2**.
+
 ### ✨ Key Features
 - 🧠 **Highly optimized** – Zero-lag performance, even on large servers.
 - 🎨 **Fully customizable GUIs** – Design the look and feel to fit your server's style.

buildSrc/build.gradle.kts

@@ -9,6 +9,7 @@ repositories {
 dependencies {
     implementation("com.gradleup.shadow:shadow-gradle-plugin:9.6.1")
     implementation("net.minecrell:plugin-yml:0.6.0")
+    implementation("org.ow2.asm:asm:9.10.1")
 }
 
 sourceSets {

buildSrc/src/main/kotlin/Versions.kt

@@ -1,7 +1,17 @@
 object Versions {
 
+    /** Java release the plugin is compiled for and requires at runtime. */
+    const val JAVA = 25
+
+    /** Spigot API the plugin is compiled against (newest supported server). */
     const val SPIGOT_API = "26.2-R0.1-SNAPSHOT"
 
+    /** Oldest supported Spigot API, verified by the `compileJavaSpigotMin` task. */
+    const val SPIGOT_API_MIN = "1.21-R0.1-SNAPSHOT"
+
+    /** Value of `api-version` in plugin.yml. */
+    const val SPIGOT_API_VERSION = "1.21"
+
     const val PLACEHOLDER_API = "2.12.3"
 
     const val PANDA_DI = "1.8.0"

buildSrc/src/main/kotlin/playtime-java.gradle.kts

@@ -6,11 +6,11 @@ group = "com.github.imdmk"
 version = "3.0.2"
 
 java {
-    toolchain.languageVersion.set(JavaLanguageVersion.of(21))
+    toolchain.languageVersion.set(JavaLanguageVersion.of(Versions.JAVA))
 }
 
-tasks.compileJava {
+tasks.withType<JavaCompile>().configureEach {
     options.compilerArgs = listOf("-Xlint:deprecation", "-parameters")
     options.encoding = "UTF-8"
-    options.release = 21
-}
+    options.release.set(Versions.JAVA)
+}