Santhiya Park Java SE Training Summary (28-32) (object class, String class, wrapper class, array)

1. String literal value Assignment
3. The string is created with new
5. Section 31 about string concatenation, intern method worth seeing before the interview
6. Wrapper class Byte, short, Int,long,float,double,boole
7. The length property of the array is public final, for example: each time the array new int[6] is initialized, it is assigned a value of 6 in the constructor method, and cannot be modified!
8. Declares only an array of objects (p[] p=new p[5]), defaults to NULL when not assigned, and does not produce an object 5 P objects

Santhiya Park Java SE Training Summary (28-32) (object class, String class, wrapper class, array)