Java中自定义异常详解及实例代码

java;">class ChushulingException extends Exception {   public ChushulingException(String msg)   {     super(msg);   } }   class ChushufuException extends Exception {   public ChushufuException(String msg)   {     super(msg);   } } 

class Numbertest  {   public int shang(int x,int y) throws ChushulingException,ChushufuException   {     if(y<0)     {       throw new ChushufuException("您输入的是"+y+",规定除数不能为负数!");//抛出异常     }     if(y==0)     {       throw new ChushulingException("您输入的是"+y+",除数不能为0!");     }        int m=x/y;     return m;   } }      class Rt001 {   public static void main(String[]args)   {     Numbertest n=new Numbertest();      //捕获异常     try     {       System.out.println("商="+n.shang(1,-3));     }     catch(ChushulingException yc)     {       System.out.println(yc.getMessage());       yc.printStackTrace();     }     catch(ChushufuException yx)     {       System.out.println(yx.getMessage());       yx.printStackTrace();     }     catch(Exception y)     {       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     } } /* 

class 异常类名 extends Exception {   public 异常类名(String msg)   {     super(msg);   } }  

try{} catch(异常类名 y){} catch(异常类名 y){} 

getMessage() //输出异常的信息 printStackTrace() //输出导致异常更为详细的信息