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

@@ -87,10 +87,15 @@
     public long getTotalSpace() throws IOException {
          return new ZipFileStoreAttributes(this).totalSpace();
     }
 
     @Override
+    public int getBlockSize() throws IOException {
+         throw new UnsupportedOperationException("getBlockSize");
+    }
+
+    @Override
     public long getUsableSpace() throws IOException {
          return new ZipFileStoreAttributes(this).usableSpace();
     }
 
     @Override