代码片--写一个异常
package com.dreamy.day04; /** * @author dreamy * 需求:老师用电脑上课 * 开始思考上课中出现的问题。 * 比如问题是: * 电脑蓝屏 * 电脑冒烟 * 要对问题进行描述,封装成对象。 * * 可是当冒烟发生后,出现讲课进度无法继续。 * 出现了讲师的问题,课时计划无法完成。 */ class LanPingException extends Exception{ LanPingException(String message) { super(message); } } class MaoYanException extends Exception{ MaoYanException(String message) { super(message); } } class NoPlanException extends Exception{ public NoPlanException(String message) { super(message); } } class Computer{ private int state=3; public void run() throws LanPingException,MaoYanException{ if(state==2) { throw new LanPingException("蓝屏了"); } if(state==3) { throw new MaoYanException("冒烟了"); } System.out.println("电脑运行"); } public void reset() { state=1; System.out.println("电脑重启"); } } class Teacher{ private String name; private Computer cmpt; public Teacher(String name) { this.name=name; cmpt=new Computer(); } public void prelect() throws NoPlanException{ try { cmpt.run(); } catch (LanPingException e) { System.out.println("蓝屏电脑可以重启"); cmpt.reset(); } catch (MaoYanException e) { System.out.println("冒烟电脑处理不了.."); test(); throw new NoPlanException("课时无法继续"+e.getMessage()); //test(); } System.out.println("讲课"); } public void test() { System.out.println("做练习"); } } public class ExceptionTest { public static void main(String[] args) { Teacher t=new Teacher("毕老师"); try { t.prelect(); }catch(NoPlanException e){ System.out.println(e.toString()); System.out.println("换老师或者放假"); } } }