JAVA自定义异常

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1、/*下面做了归纳总结,欢迎批评指正*//*自定义异常*/classChushulingExceptionextendsException{publicChushulingException(Stringmsg){super(msg);}}classChushufuExceptionextendsException{publicChushufuException(Stringmsg){super(msg);}}/*自定义异常End*/classNumbertest{publicintshang(int

2、x,inty)throwsChushulingException,ChushufuException{if(y<0){thrownewChushufuException("您输入的是"+y+",规定除数不能为负数!");//抛出异常}if(y==0){thrownewChushulingException("您输入的是"+y+",除数不能为0!");}intm=x/y;returnm;}}classRt001{publicstaticvoidmain(String[]args){Numbertest

3、n=newNumbertest();//捕获异常try{System.out.println("商="+n.shang(1,-3));}catch(ChushulingExceptionyc){System.out.println(yc.getMessage());yc.printStackTrace();}catch(ChushufuExceptionyx){System.out.println(yx.getMessage());yx.printStackTrace();}catch(Except

4、iony){System.out.println(y.getMessage());y.printStackTrace();}finally{System.out.println("finally!");}////finally不管发没发生异常都会被执行}}/*[总结]1.自定义异常:class异常类名extendsException{public异常类名(Stringmsg){super(msg);}}2.标识可能抛出的异常:throws异常类名1,异常类名23.捕获异常:try{}catch(异常

5、类名y){}catch(异常类名y){}4.方法解释getMessage()//输出异常的信息printStackTrace()//输出导致异常更为详细的信息*/