/*下面做了歸納總結,歡迎批評指正*/ 
 /*自定義異常*/ 
 class ChushulingException extends Exception 
 { 
   public ChushulingException(String msg) 
   { 
     super(msg); 
   } 
 }  
 class ChushufuException extends Exception 
 { 
   public ChushufuException(String msg) 
   { 
     super(msg); 
   } 
 } 
 /*自定義異常 End*/ 
 class Numbertest  
 { 
   public int shang(int x,int y) throws ChushulingException,ChushufuException 
   { 
     if(y<0) 
     { 
       throw new ChushufuException("您輸入的是"+y+",規(guī)定除數(shù)不能為負數(shù)!");//拋出異常 
     } 
     if(y==0) 
     { 
       throw new ChushulingException("您輸入的是"+y+",除數(shù)不能為0!"); 
     } 
     int m=x/y; 
     return m; 
   } 
 } 
 class Rt001 
 { 
   public static void main(String[]args) 
   { 
     Numbertest n=new Numbertest(); 
     //捕獲異常 
     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不管發(fā)沒發(fā)生異常都會被執(zhí)行  
   } 
 } 
 /* 
 [總結] 
 1.自定義異常: 
 class 異常類名 extends Exception 
 { 
   public 異常類名(String msg) 
   { 
     super(msg); 
   } 
 } 
 2.標識可能拋出的異常: 
 throws 異常類名1,異常類名2 
 3.捕獲異常: 
 try{} 
 catch(異常類名 y){} 
 catch(異常類名 y){} 
 4.方法解釋 
 getMessage() //輸出異常的信息 
 printStackTrace() //輸出導致異常更為詳細的信息 
 */