Java异常处理机制的秘密

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package
ayqy;

public class catchEx {

    /**

     * 测试Java异常处理机制<br />

     * 结论：<br />

     * 1.catch中throw不一定能抛回到上一层，因为finally中的return会抑制这个throw<br />

     * 2.finally中throw一定能抛回上一层，因为此时其后的return不会被执行到（throw中断了正常的顺序流）<br />

     * 3.在try/catch中return并不会直接返回上一层，而是先执行finally再返回

     */

    public
static void main(String[] args){

        // TODO Auto-generated method stub

        try{

            System.out.println("Main_try");

            fun();

        }catch(Exception e){

            System.out.println("Main_catch");

        }finally{

            System.out.println("Main_finally");

        }

    }

    public
static void fun() throws
Exception

    {

        try{

            System.out.println("Fun_try");

            int
a = 3 / 0;

        }catch(Exception ex){

            System.out.println("Fun_catch");

            throw
ex;//#1

        }finally{

            System.out.println("Fun_finally");

            return;//#2

        }

    }<br><span style="line-height: 1.5;">}</span>