Copyright: please indicate the source https://blog.csdn.net/EdwardDrew/article/details/77482224
In programming, to determine whether the practice of using == equal, but today can not be found when doing so more java project. java comparative equals ().
Since the string is a string object, so use of the equals String (), can not be determined simply by ==.
equals () compares the contents of the object (case-sensitive format letters), but if " == to" compare two objects, the memory address comparing two objects, it is not equal. Even if they are content equal, but different memory address of the object is not the same.