+ + and in Java–

Difference between I + +, I -- and + + I, -- I:

I + +, I -- assignment before operation;

@H_ 502_ 17@++i , -- I is calculated before assignment;

@H_ 502_ 17 @ I + + assigns the value of I to j first, and then I adds 1, so I = 2 and j = 1 finally++ I is first I plus 1, and then I is assigned to j, so I = 3, j = 3;

@H_ 502_ 17 @ I -- first assign the value of I to j, and then I minus 1, so I = 2 and j = 3-- I is first I minus 1, and then I is assigned to j, so finally I = 1, j = 1;