1, define an int and a String.
int? Answer? =? 1; //Define an integer.
int? str? =? "232"; //Define a string. 2. convert int into string.
String? Stella? =? a+" "; //By connecting with the string, it is converted into the string stra3 and compared with equals.
Bull? b? =? stra . equals(str); //Compare whether they are consistent. Returns true if they are equal, otherwise, b is false.