The difference between = = and equals

Today with the development to fix a bug, now list out the comparison of this detour

Scenario One:

Long a = 1;

Long B = 1;

Boolean result = (A = = B); The value of result at this time is false

Boolean result2 = (a.equals (b));//This time the value of RESULT2 is True

Boolean RESULT3 = (a.longvalue () = = B.longvalue ()); The value of RESULT3 is true at this time

Scenario Two:

Long C = 2;

Long d = 2;

Boolean result = (c = = d); The value of result is true at this time

Boolean result2 = (C.equals (d)); The value of RESULT2 at this time is true

Extension of String and StringBuilder

String occupies the stack space, each assignment will open up a new space; StringBuilder is an object that occupies the same space in the heap.

The difference between = = and equals