The difference between equals() and = =

“equals” Content comparison for reference types and “==” Generally used for comparison between basic types ,equals Compare the address of the reference type , Just use String Type to compare ,String Type has its own cache pool , Within the cache pool , If you enter two equal strings , here , It does not open up new memory space , So use == To compare is equal If you open up a new memory space To store or exceed the scope of the cache pool use == To compare is unequal , You can only use equals Method to compare whether the strings are equal .