C# HowTo 重写Equals和GetHashCode 直接上码: publicclassMyObject {publicstringname;publicoverrideboolEquals(objectobj) {if(ReferenceEquals(null, obj))returnfalse;if(ReferenceEquals(this, obj))returntrue;if(obj.GetType() !=this.GetType())returnfalse;return((MyObject)obj).name ==this.name; }public...
equals() and hashCode() in Java are two fundamental method which is declared in Object class and part or core Java library. If you have any one of below
publicclassPerson {privateString name;privateintage;//...@OverridepublicinthashCode() {returnnewHashCodeBuilder(17, 31).//two randomly chosen prime numbers//if deriving: appendSuper(super.hashCode()).append(name). append(age). toHashCode(); } @Overridepublicbooleanequals(Object obj) {if(!(obj...
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If you use HashMap, don’t forget to override equals() and hashCode() and do not use mutable objects as a key. Instead, make it immutable, because immutable objects: don’t change with time, are side-effects free, and are good in a multi-threading environment. You can find a full ...
publicoverrideintGetHashCode() { // Get the hash code for the Textual field if it is not null. inthashTextual = Textual ==null? 0 : Textual.GetHashCode(); // Get the hash code for the Digital field. inthashDigital = Digital.GetHashCode(); ...
Let’s go back a couple of points that we left unexamined. First,ObjectSynchronizer::FastHashCode()seems overly complex, needing over 100 lines to perform what we though was a trivial get-or-generate operation. Second, who is thismonitorand why does it have our object’s header?
@override public int hashcode() { return name.hashcode(); } } as we can see, the player class has a setter on the name property. so, it’s mutable. further, the hashcode() method calculates the hash code using the name property. this means changing the name of a player object...
Override the GetHashCode and Equals methods. The GetHashCode method serves as a hash function for the custom binary security token when the type is added to a Hashtable collection. Override the Equals method so that the Hashtable collection works correctly. The Equals method guarantees that two ...
@Override public void serialize(String s, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException { jsonGenerator.writeString(EntityUtils.getDesensitizedValue(sensitive,s)); } @Override public JsonSerializer<?> createContextual(SerializerProvider serializerProvider, BeanProperty bean...