今天，學習了try-catch-finally語句，本來覺得蠻簡單、易懂的。搜了一道相關類型的題。結果信心被潑了盆冷水。先把題Mark一下，出去透透風。

 1 public class TestEx {
 2     private int c;
 3 
 4     public TestEx() {
 5     }
 6 
 7     @SuppressWarnings("finally")
 8     boolean testEx() throws Exception {
 9         boolean ret = true;
10         try {
11             ret = testEx1();
 
12         } catch (Exception e) {
13             System.out.println("testEx, catch exception");
14             ret = false;
15             throw e;
16         } finally {
17             System.out.println("testEx, finally; return value=" + ret);
18             return ret;
19         }
20     }
21 
22
 
     @SuppressWarnings("finally")
23     boolean testEx1() throws Exception {
24         boolean ret = true;
25         try {
26             ret = testEx2();
27             if (!ret) {
28                 return false;
29             }
30             System.out.println("testEx1, at the end of try");
31
 
             return ret;
32         } catch (Exception e) {
33             System.out.println("testEx1, catch exception");
34             ret = false;
35             throw e;
36         } finally {
37             System.out.println("testEx1, finally; return value=" + ret);
38             return ret;
39         }
40     }
41 
42     @SuppressWarnings("finally")
43     boolean testEx2() throws Exception {
44         boolean ret = true;
45         try {
46             int b = 12;
47             for (int i = 2; i >= -2; i--) {
48                 setC(b / i);
49                 System.out.println("i=" + i);
50             }
51             return true;
52         } catch (Exception e) {
53             System.out.println("testEx2, catch exception");
54             ret = false;
55             throw e;
56         } finally {
57             System.out.println("testEx2, finally; return value=" + ret);
58             return ret;
59         }
60     }
61 
62     public static void main(String[] args) {
63         TestEx testException1 = new TestEx();
64         try {
65             testException1.testEx();
66         } catch (Exception e) {
67             e.printStackTrace();
68         }
69     }
70 
71     public int getC() {
72         return c;
73     }
74 
75     public void setC(int c) {
76         this.c = c;
77     }
78 }

Output：

看完之後我就在想，

1.Java異常處理機制，我真的理解了嗎？

2.Java異常處理，我真的掌握了嗎？

3.catch體裏遇到return 是怎麽處理？

4.finally 體裏有return怎麽處理？

5. catch 和 finally 體裏同時遇上 return 怎麽辦？

6.是不是還有個System.exit()？遇到它又咋辦？？

7.僅僅知道throws不是完全之策啊，還要繼續深入理解啊。2017-06-1918:21:08

Java異常捕獲之一道try-catch-finally語句題