fix: [#465] don't start up the launcher when running on Java 16 or newer

.github/workflows/application.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        java-version: ["1.8", "1.9", "1.10", "1.11", "1.12", "1.13", "1.14", "1.15", "1.16"]
+        java-version: ["1.8", "1.9", "1.10", "1.11", "1.12", "1.13", "1.14", "1.15"]
     steps:
       - uses: actions/checkout@v2
 

.vscode/launch.json

@@ -9,7 +9,8 @@
             "projectName": "ATLauncher",
             "cwd": "${workspaceFolder}/testLauncher",
             "preLaunchTask": "makeTestLauncherDirectory",
-            "args": "--debug --debug-level 5 --disable-error-reporting --no-launcher-update"
+            "args": "--debug --debug-level 5 --disable-error-reporting --no-launcher-update",
+            
         },
         {
             "type": "java",

CHANGELOG.md

@@ -17,6 +17,7 @@ This changelog only contains the changes that are unreleased. For changes for in
 - Checking mods on CurseForge sometimes failing
 - Loading settings sometimes returning a NPE
 - Forge maven changing url
+- Don't start up the launcher when running on Java 16 or newer [#465]
 
 ### Misc
 - Remove integration files from being written [#462]

src/main/java/com/atlauncher/Launcher.java

@@ -102,6 +102,19 @@ public class Launcher {
             OS.openWebBrowser("https://atl.pw/java8download");
             System.exit(0);
         }
+
+        if (Java.isJava16OrAbove()) {
+            LogManager.warn("You're using Java 16 or above which isn't supported by ATLauncher!");
+
+            DialogManager.optionDialog().setTitle(GetText.tr("Unsupported Java Version"))
+                    .setContent(new HTMLBuilder().center().text(GetText.tr(
+                            "You're using Java 16 or above which isn't supported by ATLauncher. You need to downgrade your Java in order to use ATLauncher.<br/><br/>The launcher will not start until you do this.<br/><br/>If you're seeing this message even after installing an older version, you may need to uninstall the newer version first.<br/><br/>Click ok to open the Java download page and close the launcher."))
+                            .build())
+                    .addOption(GetText.tr("Ok")).setType(DialogManager.ERROR).show();
+
+            OS.openWebBrowser("https://atl.pw/java8download");
+            System.exit(0);
+        }
     }
 
     public void loadEverything() {

src/main/java/com/atlauncher/utils/Java.java

@@ -151,6 +151,16 @@ public class Java {
                 getLauncherJavaVersion(), getMinecraftJavaVersionNumber(), getMinecraftJavaVersion());
     }
 
+    /**
+     * Checks if the user is using Java 16 or above.
+     *
+     * @return true if the user is using Java 16 or above else false
+     */
+    public static boolean isJava16OrAbove() {
+        int version = getLauncherJavaVersionNumber();
+        return version >= 16;
+    }
+
     /**
      * Checks if the user is using Java 7 or above.
      *