src/jdk.zipfs/share/classes/jdk/nio/zipfs/JarFileSystem.java

rev 16865 : 8176709: JarFileSystem::isMultiReleaseJar is incorrect
Reviewed-by: mchung

@@ -26,14 +26,16 @@
 package jdk.nio.zipfs;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.Runtime.Version;
+import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 import java.util.TreeMap;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.jar.Attributes;
 import java.util.jar.Manifest;

@@ -84,16 +86,16 @@
             lookup = createVersionedLinks(version < 0 ? 0 : version);
             setReadOnly();
         }
     }
 
-    private boolean isMultiReleaseJar() {
+    private boolean isMultiReleaseJar() throws IOException {
         try (InputStream is = newInputStream(getBytes("/META-INF/MANIFEST.MF"))) {
-            return (new Manifest(is)).getMainAttributes()
-                    .containsKey(new Attributes.Name("Multi-Release"));
-            // fixme change line above after JarFile integration to contain Attributes.Name.MULTI_RELEASE
-        } catch (IOException x) {
+            String multiRelease = new Manifest(is).getMainAttributes()
+                    .getValue(Attributes.Name.MULTI_RELEASE);
+            return "true".equalsIgnoreCase(multiRelease);
+        } catch (NoSuchFileException x) {
             return false;
         }
     }
 
     /**