What is the difference between x+=y and x=x+y?

In general, x+=y and x=x+y output is equivalent, so the two formulations can be common, but in some critical values to choose x+=y more appropriate, such as:

Short n=3;n+=1;//compilation failed with n=n+1;//compilation

In the above example, the right side of the n=n+1 equals evaluates to the int type, while the left variable type remains short, violating the automatic conversion rule and requiring a cast. The N+=1 statement was compiled by the "+ =" Operators are automatically type-cast based on the type of the receiving variable in the Java environment.

Therefore, x+=y is equivalent to x=x+y and coercion type conversion operations

Similar operators have a-=, *=,/= are automatically with the type cast effect, we should develop the use of x+=y instead of x=x+y writing habits.

What is the difference between x+=y and x=x+y?