8274949: Use String.contains() instead of String.indexOf() in java.base

Reviewed-by: weijun, dfuchs, vtewari, lancea

src/java.base/share/classes/sun/security/x509/AlgorithmId.java

@@ -520,7 +520,7 @@ public class AlgorithmId implements Serializable, DerEncoder {
         }
 
         // unknown algorithm oids
-        if (name.indexOf(".") == -1) {
+        if (!name.contains(".")) {
             // see if there is a matching oid string alias mapping from
             // 3rd party providers
             name = name.toUpperCase(Locale.ENGLISH);