/**

 * 描述问题 * 电脑冒烟 * 电脑蓝屏 * //异常对于谁接受，谁就处理  */

//自定义异常

//蓝屏class LanPingException extends Exception{  public LanPingException(String smg) {   super(smg); }}

//冒烟

class MaoyanException extends Exception{  public MaoyanException(String smg) {   super(smg); }}//课时无法继续class NoPlan extends Exception{  public NoPlan(String smg) {   super(smg); }}

//老师对象

class Teacher{  private String name;  private Computer cmpt; private Computer cmpt2;  public Teacher(String name) {   this.name =name;  cmpt=new Computer();  cmpt2=new Computer();  }  public void lesson() throws MaoyanException,NoPlan //声明异常 { //提供预处理方式  try  {    cmpt.run();   System.out.println("讲课");     }  catch(LanPingException e)  {    System.out.println(e.toString());   cmpt.reset();//重启之后，   lesson();//继续上课  }  catch(MaoyanException e)  {    System.out.println(e.toString());   //自己处理不了的异常，抛出   //throw e;   test();   throw new NoPlan("电脑故障，无法继续");   //换个电脑   //cmpt2.run();     }   } public void test() {   System.out.println("上自习吧，等着把你"); } }

 

//电脑对象

class Computer{  int state=2;  void run() throws LanPingException,MaoyanException {   if(state==1)     throw new LanPingException("蓝屏啦！！！");//抛出异常    if(state==2)     throw new MaoyanException("冒烟啦，挂啦！！！");//抛出异常  else  System.out.println("电脑运行"); }  void reset() {   System.out.println("重启开机");  state=0; }}

public class ExceptionTest {  public static void main(String[] args) throws  MaoyanException {   Teacher t=new Teacher("毕老师");  try  {    t.lesson();     }  catch(NoPlan e)//拿到异常对象，在处理  {    System.out.println("换人");  }   }

}