Java wrapper rules

Integer a = 1000;
Integer B = 1000;
System. out. println (a = B );
 
The above code is clear to anyone who knows the meaning of ''=''. The result is False. Because they are different objects!
 
 
Integer c = 100;
Integer d = 100;
System. out. println (c = d );
 
 
I don't know how many people think the same code is False? But the tragedy is True !!!
 
Java also has a potential rule O (Rule _ rule) O. This involves an automatic packaging and unpacking feature of java. For example, for int type, all values in the range of-128 to 127 are considered to be True!