Why can't output, b I a small white, and explain the

CodePudding user response:

The scope of the variable
B in the try to define, die try out

CodePudding user response:

In the scope of the b try {}, the try of course can't use;
Can understand, so will be abnormal in the try, abnormal after the code is not executed, so try code does not have to perform all of the variables inside will not necessarily exist, think so, may well understand some

CodePudding user response:

See see

CodePudding user response:

Java braces is scope, understand this