diff --git a/sdk/java/libjfs/main.go b/sdk/java/libjfs/main.go
index 6342e4c3d579..bde07fe5e901 100644
--- a/sdk/java/libjfs/main.go
+++ b/sdk/java/libjfs/main.go
@@ -272,6 +272,7 @@ func freeHandle(fd int) {
 type javaConf struct {
 	MetaURL           string  `json:"meta"`
 	Bucket            string  `json:"bucket"`
+	StorageClass      string  `json:"storageClass"`
 	ReadOnly          bool    `json:"readOnly"`
 	NoBGJob           bool    `json:"noBGJob"`
 	OpenCache         float64 `json:"openCache"`
@@ -468,13 +469,13 @@ func jfs_init(cname, jsonConf, user, group, superuser, supergroup *C.char) uintp
 			go metric.UpdateMetrics(m, registerer)
 		}
 
-		if jConf.Bucket != "" {
-			format.Bucket = jConf.Bucket
-		}
 		blob, err := cmd.NewReloadableStorage(format, m, func(f *meta.Format) {
 			if jConf.Bucket != "" {
 				format.Bucket = jConf.Bucket
 			}
+			if jConf.StorageClass != "" {
+				format.StorageClass = jConf.StorageClass
+			}
 		})
 		if err != nil {
 			logger.Errorf("object storage: %s", err)
diff --git a/sdk/java/src/main/java/io/juicefs/JuiceFileSystemImpl.java b/sdk/java/src/main/java/io/juicefs/JuiceFileSystemImpl.java
index 77a2c05f4e87..272019ded354 100644
--- a/sdk/java/src/main/java/io/juicefs/JuiceFileSystemImpl.java
+++ b/sdk/java/src/main/java/io/juicefs/JuiceFileSystemImpl.java
@@ -367,6 +367,7 @@ public void initialize(URI uri, Configuration conf) throws IOException {
       obj.put(key, Boolean.valueOf(getConf(conf, key, "false")));
     }
     obj.put("bucket", getConf(conf, "bucket", ""));
+    obj.put("storageClass", getConf(conf, "storage-class", ""));
     obj.put("readOnly", Boolean.valueOf(getConf(conf, "read-only", "false")));
     obj.put("noBGJob", Boolean.valueOf(getConf(conf, "no-bgjob", "false")));
     obj.put("cacheDir", getConf(conf, "cache-dir", "memory"));
@@ -579,7 +580,7 @@ public static Libjfs loadLibrary() throws IOException {
     LibraryLoader<Libjfs> libjfsLibraryLoader = LibraryLoader.create(Libjfs.class);
     libjfsLibraryLoader.failImmediately();
 
-    int soVer = 7;
+    int soVer = 8;
     String osId = "so";
     String archId = "amd64";
     String resourceFormat = "libjfs-%s.%s.gz";