Java Notes (i)

String inherits object, overriding the Equals method of object (the Equ method in the superclass is a judgment reference, which is the = = judgment), but the Equals method after the string rewrite is to judge the content

String a = "Hello World" and string b = "Hello World"; System.out.println (A = = B); System.out.println (A.equals (b)); The output is true;

　　

Comparable is the class that inherits (implements the interface), then the class internally overrides the CompareTo method, class test implentents comparable () {compareTo ...};

Comparator is separate, then internally rewrite the CompareTo method, comparator the whole as a parameter passed to Sort,sort () <comparator>;

Just come to the lab to write so much, wait for the completion, the above is not perfect!

Java Notes (i)