Programming VIP

One. preface We all know that to compare whether two objects are equal, we need to call the equals() method of the object, that is, to judge whether the object address pointed to by the object reference is equal. When the object address is equal, the object handle, object header, object instance data and object type data related to the object ...

What is the function of hashCode method? (1) Foreword, to understand the function of hashCode, you must first know the collection in Java. There are two types of collections in Java, One is List, and the other is Set. The elements in the former set are ordered and can be repeated; The latter element is unordered, but the element is not re ...