忘记处理异常是逻辑/运行时错误还是不是错误

Question

For example, read line from terminal by BufferedReader without handling the error

    BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
    try{            
        String input = input.readLine();
    }
    catch(Exception e){
    // Do Noting
    }

Is not handling the IOException an error? if it is an error, is it an logical error or runtime error? And why?

Answer 1

From the clarification in the comments, it is:

0. A language error

The String input masks access to the BufferedReader input - but maybe that's just an error in this posting

and

1. Several logical errors

The errors are (1) the impossibility of doing anything with successful input, since the variable goes out of scope, (2) the lack of feedback to the user about invalid input, and maybe (3) the lack of visible retry or program abort due to the error, one of which I'd guess should happen, and maybe (4) quietly eating all Exceptions when from the description it probably ought to handle IOException only, and (5) no code implemented for rejecting integers, as is claimed the requirements say - digits are characters too.

and

2. A runtime error

The failure of readline to read a line is an event that happens at run time, which may or may not occur on any given execution.

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To say it differently, the logic error is failure to adequately anticipate and handle possible runtime errors.