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src/java.desktop/share/classes/sun/java2d/marlin/MarlinUtils.java
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
@@ -58,6 +58,24 @@
System.out.print("WARNING: ");
System.out.println(msg);
th.printStackTrace(System.err);
}
}
+
+ // From sun.awt.util.ThreadGroupUtils
+
+ /**
+ * Returns a root thread group.
+ * Should be called with {@link sun.security.util.SecurityConstants#MODIFY_THREADGROUP_PERMISSION}
+ *
+ * @return a root {@code ThreadGroup}
+ */
+ public static ThreadGroup getRootThreadGroup() {
+ ThreadGroup currentTG = Thread.currentThread().getThreadGroup();
+ ThreadGroup parentTG = currentTG.getParent();
+ while (parentTG != null) {
+ currentTG = parentTG;
+ parentTG = currentTG.getParent();
+ }
+ return currentTG;
+ }
}
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