关于finally的问题！

Question

我用eclipse写了一段程序，但eclipse给我了一段警告：finally block does not complete normallytry {
                //　 try 块里主要是写读文件，当遇到一些错误时，设置isError标志位，并抛出异常                } catch (EOFException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                } catch (SecurityException e) {
                        e.printStackTrace();
                } catch (Exception e) {
                        e.printStackTrace();
                } finally {
                        try {
                                dis.close();
                                is.close();
                                alermSchedule.close();
                                
                        } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        } finally {
                                if ( isError || !fileExists ) {
                                        return null;
                                } else {
                                        return timeVector;
                                }
                        }
                }
但我如果要是写成以下形式，就没有警告，try {
                } catch (EOFException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                } catch (SecurityException e) {
                        e.printStackTrace();
                } catch (Exception e) {
                        e.printStackTrace();
                } finally {
                        try {
                                dis.close();
                                is.close();
                                alermSchedule.close();
                                
                        } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        }
                }
                if ( isError || !fileExists ) {
                        return null;
                } else {
                        return timeVector;
                }我主要想知道这个警告是如何产生的？为什么出会出现这样的警告？
谢谢大家了。

Answer 1

The classic use for finally is to clean up resources.
Do not return from finally directly.

Answer 2

ls的顶一个不能再finally直接返回

Answer 3

finally中不推荐使用 continue，break，return等可以直接跳出的关键词，正如楼上所说的，finally主要做的是清楚资源。