Consistently declare Object::equals argument as @Nullable

spring-core/src/main/java/org/springframework/aot/generate/MethodName.java

@@ -96,7 +96,7 @@ final class MethodName {
 	}
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(@Nullable Object obj) {
 		if (this == obj) {
 			return true;
 		}

spring-core/src/main/java/org/springframework/aot/hint/AbstractTypeReference.java

@@ -83,7 +83,7 @@ public abstract class AbstractTypeReference implements TypeReference {
 	}
 
 	@Override
-	public boolean equals(Object other) {
+	public boolean equals(@Nullable Object other) {
 		if (this == other) {
 			return true;
 		}

spring-core/src/main/java/org/springframework/aot/hint/JavaSerializationHint.java

@@ -56,7 +56,7 @@ public class JavaSerializationHint implements ConditionalHint {
 	}
 
 	@Override
-	public boolean equals(Object o) {
+	public boolean equals(@Nullable Object o) {
 		if (this == o) {
 			return true;
 		}

spring-core/src/main/java/org/springframework/aot/hint/JdkProxyHint.java

@@ -77,7 +77,7 @@ public final class JdkProxyHint implements ConditionalHint {
 	}
 
 	@Override
-	public boolean equals(Object o) {
+	public boolean equals(@Nullable Object o) {
 		if (this == o) {
 			return true;
 		}

spring-core/src/main/java/org/springframework/aot/hint/ResourceBundleHint.java

@@ -56,7 +56,7 @@ public final class ResourceBundleHint implements ConditionalHint {
 	}
 
 	@Override
-	public boolean equals(Object o) {
+	public boolean equals(@Nullable Object o) {
 		if (this == o) {
 			return true;
 		}

spring-core/src/main/java/org/springframework/aot/hint/ResourcePatternHint.java

@@ -98,7 +98,7 @@ public final class ResourcePatternHint implements ConditionalHint {
 	}
 
 	@Override
-	public boolean equals(Object o) {
+	public boolean equals(@Nullable Object o) {
 		if (this == o) {
 			return true;
 		}

spring-core/src/main/java/org/springframework/aot/hint/TypeHint.java

@@ -287,7 +287,7 @@ public final class TypeHint implements ConditionalHint {
 		}
 
 		@Override
-		public boolean equals(Object o) {
+		public boolean equals(@Nullable Object o) {
 			if (this == o) {
 				return true;
 			}

spring-core/src/main/java/org/springframework/core/env/ProfilesParser.java

@@ -174,7 +174,7 @@ final class ProfilesParser {
 		}
 
 		@Override
-		public boolean equals(Object obj) {
+		public boolean equals(@Nullable Object obj) {
 			if (this == obj) {
 				return true;
 			}

spring-core/src/main/java/org/springframework/util/UnmodifiableMultiValueMap.java

@@ -125,7 +125,7 @@ final class UnmodifiableMultiValueMap<K,V> implements MultiValueMap<K,V>, Serial
 	}
 
 	@Override
-	public boolean equals(Object obj) {
+	public boolean equals(@Nullable Object obj) {
 		return this == obj || this.delegate.equals(obj);
 	}
 
@@ -362,7 +362,7 @@ final class UnmodifiableMultiValueMap<K,V> implements MultiValueMap<K,V>, Serial
 		}
 
 		@Override
-		public boolean equals(Object obj) {
+		public boolean equals(@Nullable Object obj) {
 			if (this == obj) {
 				return true;
 			}
@@ -508,7 +508,7 @@ final class UnmodifiableMultiValueMap<K,V> implements MultiValueMap<K,V>, Serial
 			}
 
 			@Override
-			public boolean equals(Object obj) {
+			public boolean equals(@Nullable Object obj) {
 				if (this == obj) {
 					return true;
 				}
@@ -625,7 +625,7 @@ final class UnmodifiableMultiValueMap<K,V> implements MultiValueMap<K,V>, Serial
 		}
 
 		@Override
-		public boolean equals(Object obj) {
+		public boolean equals(@Nullable Object obj) {
 			return this == obj || this.delegate.equals(obj);
 		}