有哪位仁兄知道java 中 += 的底层原理吗， 比如类型转换之类等 小弟对原理比较入迷
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不需要理解的太复杂吧？基本上就是自动帮你加个强转而已。
比如：
i += expRight;
约等于
i = (int) (i + expRight);
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- Java code
from：java language specification15.26.2 Compound Assignment OperatorsA compound assignment expression of the form E1 op= E2 is equivalent to E1 = (T)((E1) op (E2)), where T is the type of E1, except that E1 is evaluated only once.For example, the following code is correct: short x = 3; x += 4.6;and results in x having the value 7 because it is equivalent to: short x = 3; x = (short)(x + 4.6);