在Java項(xiàng)目中如何實(shí)現(xiàn)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); 
  } 
} 

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(fù)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(huì)被執(zhí)行  
 
  } 
} 
/* 

class 異常類名 extends Exception 
{ 
  public 異常類名(String msg) 
  { 
    super(msg); 
  } 
} 
 

try{} 
catch(異常類名 y){} 
catch(異常類名 y){} 

getMessage() //輸出異常的信息 
printStackTrace() //輸出導(dǎo)致異常更為詳細(xì)的信息