Java中自定义异常

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转自：http://blog.csdn.net/stellaah/article/details/6738424
/*下面做了归纳总结,欢迎批评指正*/    /*自定义异常*/  class ChushulingException extends Exception  {      public ChushulingException(String msg)      {          super(msg);      }  }     class ChushufuException extends Exception  {      public ChushufuException(String msg)      {          super(msg);      }  }    /*自定义异常 End*/    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          }  }  /* [总结]  1.自定义异常:  class 异常类名 extends Exception {     public 异常类名(String msg)     {         super(msg);     } }   2.标识可能抛出的异常:  throws 异常类名1,异常类名2  3.捕获异常: try{} catch(异常类名 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   */
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