3 files changed, 13 insertions, 1 deletions
diff --git a/launcher/minecraft/VersionFilterData.cpp b/launcher/minecraft/VersionFilterData.cpp
index 38e7b60c..c286d266 100644
--- a/launcher/minecraft/VersionFilterData.cpp
+++ b/launcher/minecraft/VersionFilterData.cpp
@@ -68,4 +68,5 @@ VersionFilterData::VersionFilterData()
 
     java8BeginsDate  = timeFromS3Time("2017-03-30T09:32:19+00:00");
     java16BeginsDate = timeFromS3Time("2021-05-12T11:19:15+00:00");
+    java17BeginsDate = timeFromS3Time("2021-11-16T17:04:48+00:00");
 }
diff --git a/launcher/minecraft/VersionFilterData.h b/launcher/minecraft/VersionFilterData.h
index 79756c3f..13445a51 100644
--- a/launcher/minecraft/VersionFilterData.h
+++ b/launcher/minecraft/VersionFilterData.h
@@ -25,5 +25,7 @@ struct VersionFilterData
     QDateTime java8BeginsDate;
     // release data of first version to require Java 16 (21w19a)
     QDateTime java16BeginsDate;
+    // release data of first version to require Java 17 (1.18 Pre Release 2)
+    QDateTime java17BeginsDate;
 };
 extern VersionFilterData g_VersionFilterData;
diff --git a/launcher/minecraft/launch/VerifyJavaInstall.cpp b/launcher/minecraft/launch/VerifyJavaInstall.cpp
index 657669af..d9f7ecdc 100644
--- a/launcher/minecraft/launch/VerifyJavaInstall.cpp
+++ b/launcher/minecraft/launch/VerifyJavaInstall.cpp
@@ -11,8 +11,17 @@ void VerifyJavaInstall::executeTask() {
     auto javaVersion = m_inst->getJavaVersion();
     auto minecraftComponent = m_inst->getPackProfile()->getComponent("net.minecraft");
 
+    // Java 17 requirement
+    if (minecraftComponent->getReleaseDateTime() >= g_VersionFilterData.java17BeginsDate) {
+        if (javaVersion.major() < 17) {
+            emit logLine("Minecraft 1.18 Pre Release 2 and above require the use of Java 17",
+                         MessageLevel::Fatal);
+            emitFailed(tr("Minecraft 1.18 Pre Release 2 and above require the use of Java 17"));
+            return;
+        }
+    }
     // Java 16 requirement
-    if (minecraftComponent->getReleaseDateTime() >= g_VersionFilterData.java16BeginsDate) {
+    else if (minecraftComponent->getReleaseDateTime() >= g_VersionFilterData.java16BeginsDate) {
         if (javaVersion.major() < 16) {
             emit logLine("Minecraft 21w19a and above require the use of Java 16",
                          MessageLevel::Fatal);