Java中自定义异常

/*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


*/