Refactor hashCode method in DefaultAddressStandardClaim

Extract magic number 31 to  variable

Signed-off-by: kimjg <[email protected]>

Author: k42ke

oauth2/oauth2-core/src/main/java/org/springframework/security/oauth2/core/oidc/DefaultAddressStandardClaim.java

@@ -105,12 +105,15 @@ public boolean equals(Object obj) {
 
 	@Override
 	public int hashCode() {
+
 		int result = (this.getFormatted() != null) ? this.getFormatted().hashCode() : 0;
-		result = 31 * result + ((this.getStreetAddress() != null) ? this.getStreetAddress().hashCode() : 0);
-		result = 31 * result + ((this.getLocality() != null) ? this.getLocality().hashCode() : 0);
-		result = 31 * result + ((this.getRegion() != null) ? this.getRegion().hashCode() : 0);
-		result = 31 * result + ((this.getPostalCode() != null) ? this.getPostalCode().hashCode() : 0);
-		result = 31 * result + ((this.getCountry() != null) ? this.getCountry().hashCode() : 0);
+		int thirtyOne = 31;
+
+		result = thirtyOne * result + ((this.getStreetAddress() != null) ? this.getStreetAddress().hashCode() : 0);
+		result = thirtyOne * result + ((this.getLocality() != null) ? this.getLocality().hashCode() : 0);
+		result = thirtyOne * result + ((this.getRegion() != null) ? this.getRegion().hashCode() : 0);
+		result = thirtyOne * result + ((this.getPostalCode() != null) ? this.getPostalCode().hashCode() : 0);
+		result = thirtyOne * result + ((this.getCountry() != null) ? this.getCountry().hashCode() : 0);
 		return result;
 	}