1311: use of Collections.singleton

Author: emmanouil-vega

fluss-filesystems/fluss-fs-abfs/src/main/java/org/apache/fluss/fs/abfs/token/AzureDelegationTokenProvider.java

@@ -27,7 +27,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
-import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -56,7 +56,7 @@ public AzureDelegationTokenProvider(String scheme, Configuration conf) {
         this.authEndpoint = conf.get(ENDPOINT_KEY);
         this.additionInfos = new HashMap<>();
 
-        for (String key : Arrays.asList(ENDPOINT_KEY)) {
+        for (String key : Collections.singleton(ENDPOINT_KEY)) {
             if (conf.get(key) != null) {
                 additionInfos.put(key, conf.get(key));
             }