--- a/src/java.desktop/share/classes/javax/sound/sampled/Line.java	Fri Mar 29 17:46:59 2019 -0700
+++ b/src/java.desktop/share/classes/javax/sound/sampled/Line.java	Fri Mar 29 23:14:37 2019 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2019, 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
@@ -324,20 +324,11 @@
          */
         @Override
         public String toString() {
-
-            String fullPackagePath = "javax.sound.sampled.";
-            String initialString = new String(getLineClass().toString());
-            String finalString;
-
-            int index = initialString.indexOf(fullPackagePath);
-
-            if (index != -1) {
-                finalString = initialString.substring(0, index) + initialString.substring( (index + fullPackagePath.length()), initialString.length() );
-            } else {
-                finalString = initialString;
+            final String str = getLineClass().toString();
+            if (getLineClass().getPackage() == Line.class.getPackage()) {
+                return str.replace("javax.sound.sampled.", "");
             }
-
-            return finalString;
+            return str;
         }
     }
 }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/javax/sound/sampled/Lines/ToString.java	Fri Mar 29 23:14:37 2019 -0700
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2019, 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
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package bug.javax.sound.sampled;
+
+import javax.sound.sampled.Clip;
+import javax.sound.sampled.DataLine;
+import javax.sound.sampled.Line;
+import javax.sound.sampled.Mixer;
+import javax.sound.sampled.Port;
+import javax.sound.sampled.SourceDataLine;
+import javax.sound.sampled.TargetDataLine;
+
+/**
+ * @test
+ * @bug 8221436
+ * @run main/othervm bug.javax.sound.sampled.ToString
+ */
+public final class ToString {
+
+    public static void main(final String[] args) {
+
+        // Behavior of toString() methods is not specified, the checks in
+        // this test just defends against accidental changes.
+
+        String custom = new Line.Info(ToString.class).toString();
+        if (!custom.contains("bug.javax.sound.sampled")) {
+            throw new RuntimeException("Package is missing: " + custom);
+        }
+        String ints = new Line.Info(int.class).toString();
+        if (ints.contains("javax.sound.sampled")) {
+            throw new RuntimeException("Package is present: " + ints);
+        }
+        String array = new Line.Info(int[].class).toString();
+        if (array.contains("javax.sound.sampled")) {
+            throw new RuntimeException("Package is present: " + array);
+        }
+
+        String line = new Line.Info(Line.class).toString();
+        if (!line.equals("interface Line")) {
+            throw new RuntimeException("Wrong string: " + line);
+        }
+        String target = new Line.Info(TargetDataLine.class).toString();
+        if (!target.equals("interface TargetDataLine")) {
+            throw new RuntimeException("Wrong string: " + target);
+        }
+        String source = new Line.Info(SourceDataLine.class).toString();
+        if (!source.equals("interface SourceDataLine")) {
+            throw new RuntimeException("Wrong string: " + source);
+        }
+        String port = new Line.Info(Port.class).toString();
+        if (!port.equals("interface Port")) {
+            throw new RuntimeException("Wrong string: " + port);
+        }
+        String data = new Line.Info(DataLine.class).toString();
+        if (!data.equals("interface DataLine")) {
+            throw new RuntimeException("Wrong string: " + data);
+        }
+        String mixer = new Line.Info(Mixer.class).toString();
+        if (!mixer.equals("interface Mixer")) {
+            throw new RuntimeException("Wrong string: " + mixer);
+        }
+        String clip = new Line.Info(Clip.class).toString();
+        if (!clip.equals("interface Clip")) {
+            throw new RuntimeException("Wrong string: " + clip);
+        }
+
+        String dataLine = new DataLine.Info(DataLine.class, null, 0).toString();
+        if (!dataLine.contains("interface DataLine")) {
+            throw new RuntimeException("Wrong string: " + dataLine);
+        }
+    }
+}