Consistent equals/hashCode style (and related polishing)

spring-web/src/main/java/org/springframework/http/DefaultHttpStatusCode.java

@@ -27,8 +27,7 @@ import org.springframework.lang.Nullable;
  * @author Arjen Poutsma
  * @since 6.0
  */
-final class DefaultHttpStatusCode
-		implements HttpStatusCode, Comparable<HttpStatusCode>, Serializable {
+final class DefaultHttpStatusCode implements HttpStatusCode, Comparable<HttpStatusCode>, Serializable {
 
 	private static final long serialVersionUID = 7017664779360718111L;
 
@@ -79,21 +78,22 @@ final class DefaultHttpStatusCode
 		return this.value / 100;
 	}
 
+
 	@Override
 	public int compareTo(@NonNull HttpStatusCode o) {
 		return Integer.compare(this.value, o.value());
 	}
 
+	@Override
+	public boolean equals(@Nullable Object other) {
+		return (this == other || (other instanceof HttpStatusCode that && this.value == that.value()));
+	}
+
 	@Override
 	public int hashCode() {
 		return this.value;
 	}
 
-	@Override
-	public boolean equals(@Nullable Object obj) {
-		return (this == obj) || (obj instanceof HttpStatusCode that && this.value == that.value());
-	}
-
 	@Override
 	public String toString() {
 		return Integer.toString(this.value);

spring-web/src/main/java/org/springframework/http/HttpHeaders.java

@@ -1834,21 +1834,8 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
-		if (this == obj) {
-			return true;
-		}
-		if (!(obj instanceof HttpHeaders other)) {
-			return false;
-		}
-		return unwrap(this).equals(unwrap(other));
-	}
-
-	private static MultiValueMap<String, String> unwrap(HttpHeaders headers) {
-		while (headers.headers instanceof HttpHeaders httpHeaders) {
-			headers = httpHeaders;
-		}
-		return headers.headers;
+	public boolean equals(@Nullable Object other) {
+		return (this == other || (other instanceof HttpHeaders that && unwrap(this).equals(unwrap(that))));
 	}
 
 	@Override
@@ -1955,6 +1942,14 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 		return new String(encodedBytes, charset);
 	}
 
+
+	private static MultiValueMap<String, String> unwrap(HttpHeaders headers) {
+		while (headers.headers instanceof HttpHeaders httpHeaders) {
+			headers = httpHeaders;
+		}
+		return headers.headers;
+	}
+
 	// Package-private: used in ResponseCookie
 	static String formatDate(long date) {
 		Instant instant = Instant.ofEpochMilli(date);

spring-web/src/main/java/org/springframework/http/HttpMethod.java

@@ -170,8 +170,8 @@ public final class HttpMethod implements Comparable<HttpMethod>, Serializable {
 	}
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
-		return (this == obj) || (obj instanceof HttpMethod that && this.name.equals(that.name));
+	public boolean equals(@Nullable Object other) {
+		return (this == other || (other instanceof HttpMethod that && this.name.equals(that.name)));
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/server/DefaultPathContainer.java

@@ -74,8 +74,8 @@ final class DefaultPathContainer implements PathContainer {
 
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
-		return (this == obj) || (obj instanceof PathContainer that && value().equals(that.value()));
+	public boolean equals(@Nullable Object other) {
+		return (this == other) || (other instanceof PathContainer that && value().equals(that.value()));
 	}
 
 	@Override
@@ -281,8 +281,8 @@ final class DefaultPathContainer implements PathContainer {
 		}
 
 		@Override
-		public boolean equals(@Nullable Object obj) {
-			return (this == obj) || (obj instanceof PathSegment that && value().equals(that.value()));
+		public boolean equals(@Nullable Object other) {
+			return (this == other || (other instanceof PathSegment that && this.value.equals(that.value())));
 		}
 
 		@Override

spring-web/src/main/java/org/springframework/web/multipart/MultipartFileResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -88,9 +88,9 @@ class MultipartFileResource extends AbstractResource {
 
 
 	@Override
-	public boolean equals(@Nullable Object obj) {
-		return (this == obj || (obj instanceof MultipartFileResource other &&
-				this.multipartFile.equals(other.multipartFile)));
+	public boolean equals(@Nullable Object other) {
+		return (this == other || (other instanceof MultipartFileResource that &&
+				this.multipartFile.equals(that.multipartFile)));
 	}
 
 	@Override