diff --git a/t/t4018/java-non-sealed b/t/t4018/java-non-sealed
new file mode 100644
index 0000000000..069087c1c6
--- /dev/null
+++ b/t/t4018/java-non-sealed
@@ -0,0 +1,8 @@
+public abstract sealed class SealedClass {
+    public static non-sealed class RIGHT extends SealedClass {
+        static int ONE;
+        static int TWO;
+        static int THREE;
+        private int ChangeMe;
+    }
+}
diff --git a/t/t4018/java-sealed b/t/t4018/java-sealed
new file mode 100644
index 0000000000..785fbc62bc
--- /dev/null
+++ b/t/t4018/java-sealed
@@ -0,0 +1,7 @@
+public abstract sealed class Sealed { // RIGHT
+    static int ONE;
+    static int TWO;
+    static int THREE;
+    public final class ChangeMe extends Sealed {
+    }
+}
diff --git a/t/t4018/java-sealed-permits b/t/t4018/java-sealed-permits
new file mode 100644
index 0000000000..18dd4894cf
--- /dev/null
+++ b/t/t4018/java-sealed-permits
@@ -0,0 +1,6 @@
+public abstract sealed class RIGHT permits PermittedA, PermittedB {
+    static int ONE;
+    static int TWO;
+    static int THREE;
+    private int ChangeMe;
+}
diff --git a/t/t4018/java-sealed-type-parameters b/t/t4018/java-sealed-type-parameters
new file mode 100644
index 0000000000..e6530c47c3
--- /dev/null
+++ b/t/t4018/java-sealed-type-parameters
@@ -0,0 +1,6 @@
+public abstract sealed class RIGHT<A, B> {
+    static int ONE;
+    static int TWO;
+    static int THREE;
+    private int ChangeMe;
+}
diff --git a/t/t4018/java-sealed-type-parameters-implements-permits b/t/t4018/java-sealed-type-parameters-implements-permits
new file mode 100644
index 0000000000..bd6e6d3582
--- /dev/null
+++ b/t/t4018/java-sealed-type-parameters-implements-permits
@@ -0,0 +1,6 @@
+public abstract sealed class RIGHT<A, B> implements List<A> permits PermittedA, PermittedB {
+    static int ONE;
+    static int TWO;
+    static int THREE;
+    private int ChangeMe;
+}
diff --git a/t/t4018/java-sealed-type-parameters-permits b/t/t4018/java-sealed-type-parameters-permits
new file mode 100644
index 0000000000..25a0da6442
--- /dev/null
+++ b/t/t4018/java-sealed-type-parameters-permits
@@ -0,0 +1,6 @@
+public abstract sealed class RIGHT<A, B> permits PermittedA, PermittedB {
+    static int ONE;
+    static int TWO;
+    static int THREE;
+    private int ChangeMe;
+}
diff --git a/userdiff.c b/userdiff.c
index 37ac98e177..94cca1a2a8 100644
--- a/userdiff.c
+++ b/userdiff.c
@@ -171,7 +171,7 @@ PATTERNS("html",
 PATTERNS("java",
 	 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
 	 /* Class, enum, interface, and record declarations */
-	 "^[ \t]*(([a-z]+[ \t]+)*(class|enum|interface|record)[ \t]+.*)$\n"
+	 "^[ \t]*(([a-z-]+[ \t]+)*(class|enum|interface|record)[ \t]+.*)$\n"
 	 /* Method definitions; note that constructor signatures are not */
 	 /* matched because they are indistinguishable from method calls. */
 	 "^[ \t]*(([A-Za-z_<>&][][?&<>.,A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",