try/catch执行顺序

代码一:正常执行

@Test
    public void test8() {
        System.out.println("a:"+getNum());
    }

    public int getNum(){
        int a = 1;
        try {
//            int b = 1 / 0;
        } catch (Exception e) {
            a++;
            System.out.println("异常时,a:"+a);
            return a;
        } finally {
            a++;
            System.out.println("finally内,a:"+a);
        }
        a++;
        System.out.println("外部,a:"+a);
        return a ;
    }

执行结果一

代码二:抛出异常

@Test
    public void test8() {
        System.out.println("调用a:"+getNum());
    }

    public int getNum(){
        int a = 1;
        try {
            int b = 1 / 0;
        } catch (Exception e) {
            a++;
            System.out.println("异常时,a:"+a);
            return a;
        } finally {
            a++;
            System.out.println("finally内,a:"+a);
        }
        a++;
        System.out.println("外部,a:"+a);
        return a ;
    }

执行结果二

代码三: catch/finally 都return

@Test
    public void test8() {
        System.out.println("调用a:"+getNum());
    }

    public int getNum(){
        int a = 1;
        try {
            int b = 1 / 0;
        } catch (Exception e) {
            a++;
            System.out.println("异常时,a:"+a);
            return a;
        } finally {
            a++;
            System.out.println("finally内,a:"+a);
            return a;
        }
    }

执行结果三:

结论

finally 内部的代码不论是否抛出异常;是否return ;都会执行!!! return结果时, 以finally内部的语句最优先 ;try和catch内部语句次之; 外部语句最次之