适当的时候，要用try catch来替换掉if else

package com.test;/**  * @author QiaoJiafei  * @version 创建时间：2016年1月6日 下午2:58:41  * 类说明  */public class TestException {    public static void main(String[] args) {        // TODO Auto-generated method stub        Teacher t = new Teacher("乔佳飞");        try {            t.jk();        } catch (NoPlanException e) {            System.out.println(e.toString()+"..............");            // TODO Auto-generated catch block            System.out.println("我知道了");        }    }}class Teacher {    String name;    Computor cp;    public Teacher(String name) {        // TODO Auto-generated constructor stub        this.name = name;        cp = new Computor();    }        void jk() throws NoPlanException {        try {            cp.run();            System.out.println(name+"开始讲课");        } catch (MaoYanException e) {            // TODO Auto-generated catch block            System.out.println(e.toString());            test();            throw  new NoPlanException("停止讲课，原因是："+e.toString());        } catch (LanPingException e) {            // TODO Auto-generated catch block            System.out.println(e.toString());            cp.reset();            cp.state = 0;            jk();        }    }        void test() {        System.out.println("大家联系");    }    }class Computor {    int state = 2;    void run() throws MaoYanException, LanPingException {                if(state == 1)            throw new LanPingException("电脑蓝屏了");        if(state == 2)            throw new MaoYanException("电脑冒烟了");        System.out.println("电脑开始运行");    }        void reset() {        System.out.println("电脑重启");    }}class MaoYanException extends Exception {    MaoYanException(String msg) {        super(msg);    }}class LanPingException extends Exception {    LanPingException(String msg) {        super(msg);    }}class NoPlanException extends Exception {    NoPlanException(String msg) {        super(msg);    }}