The small problem of 2:java compound assignment expression in Java learning essay

Question: i + = j is just the shorthand for i = i + j?

Answer: not also! Look at the following program:

int i = 5; long j = 8+ = j;    // can be compiled and the result is correct i = i + j;    // cannot compile, type conversion issues

In fact, Java will convert i + = j to i = (int) (i + j) to execute.

Typically, a compound assignment expression in the form of a E1 op= E2 is equivalent to E1 = (t) ((E1) + (E2)) and T is the type of E1.

Ps:java how to generate an integer of interval (such as 100-200)?

For:

 Public Static int randint (intint  min) {                Random rand;         int randnum = Rand.nextint ((max-min) + 1) + min;         return randnum;      }

The small problem of 2:java compound assignment expression in Java learning essay