Java异常捕获之一道try-catch-finally语句题

今天，学习了try-catch-finally语句，本来觉得蛮简单、易懂的。搜了一道相关类型的题。结果信心被泼了盆冷水。先把题Mark一下，出去透透风。

public class TestEx {
    private int c;

    public TestEx() {
    }

    @SuppressWarnings("finally")
    boolean testEx() throws Exception {
        boolean ret = true;
        try {
            ret = testEx1();
        } catch (Exception e) {
            System.out.println("testEx, catch exception");
            ret = false;
            throw e;
        } finally {
            System.out.println("testEx, finally; return value=" + ret);
            return ret;
        }
    }

    @SuppressWarnings("finally")
    boolean testEx1() throws Exception {
        boolean ret = true;
        try {
            ret = testEx2();
            if (!ret) {
                return false;
            }
            System.out.println("testEx1, at the end of try");
            return ret;
        } catch (Exception e) {
            System.out.println("testEx1, catch exception");
            ret = false;
            throw e;
        } finally {
            System.out.println("testEx1, finally; return value=" + ret);
            return ret;
        }
    }

    @SuppressWarnings("finally")
    boolean testEx2() throws Exception {
        boolean ret = true;
        try {
            int b = 12;
            for (int i = 2; i >= -2; i--) {
                setC(b / i);
                System.out.println("i=" + i);
            }
            return true;
        } catch (Exception e) {
            System.out.println("testEx2, catch exception");
            ret = false;
            throw e;
        } finally {
            System.out.println("testEx2, finally; return value=" + ret);
            return ret;
        }
    }

    public static void main(String[] args) {
        TestEx testException1 = new TestEx();
        try {
            testException1.testEx();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public int getC() {
        return c;
    }

    public void setC(int c) {
        this.c = c;
    }
}

Output：

看完之后我就在想，

1.Java异常处理机制，我真的理解了吗？

2.Java异常处理，我真的掌握了吗？

3.catch体里遇到return 是怎么处理？

4.finally 体里有return怎么处理？

5. catch 和 finally 体里同时遇上 return 怎么办？

6.是不是还有个System.exit()？遇到它又咋办？？

7.仅仅知道throws不是完全之策啊，还要继续深入理解啊。2017-06-1918:21:08