Java中自定义异常

print?

/*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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