fix

Author: trask

custom-checks/build.gradle.kts

@@ -14,8 +14,8 @@ otelJava.moduleName.set("io.opentelemetry.javaagent.customchecks")
 // We also can't seem to use the toolchain without the "--release" option. So disable everything.
 
 java {
-  sourceCompatibility = JavaVersion.VERSION_17
-  targetCompatibility = JavaVersion.VERSION_17
+  sourceCompatibility = JavaVersion.VERSION_21
+  targetCompatibility = JavaVersion.VERSION_21
   toolchain {
     languageVersion.set(null as JavaLanguageVersion?)
   }
@@ -43,17 +43,17 @@ tasks {
     }
   }
 
-  // only test on java 17+
+  // only test on java 21+
   val testJavaVersion: String? by project
-  if (testJavaVersion != null && Integer.valueOf(testJavaVersion) < 17) {
+  if (testJavaVersion != null && Integer.valueOf(testJavaVersion) < 21) {
     test {
       enabled = false
     }
   }
 }
 
 tasks.withType<Test>().configureEach {
-  // required on jdk17
+  // required when accessing javac internals
   jvmArgs("--add-opens=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED")
   jvmArgs("--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED")
   jvmArgs("--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED")