div.java.bak

半年的java基础联系源码！现在看了破！对于初学java的朋友能帮上忙就用吧

import java.io.*;
class Div
{
	double div1;
	double div2;
	Div(double div1,double div2) throws DivException
	{
		this.div1=div1;
		this.div2=div2;
		if(div2==0)
		      throw new DivException(div1);
	}
	double retResult() 
	{
		double result;
		result=div1/div2;      
		return result;      
		
	}
	public static void main(String[] args)
	{
		double tt;
		double div1=0;
	        double div2=0;
	       
		BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
	        try
	        {
			div1=Double.valueOf(in.readLine()).doubleValue();
			div2=Double.valueOf(in.readLine()).doubleValue();
		}
		catch(Exception t)
		{
			System.out.println(t);
		}
		try
		{
			Div dd=new Div(div1,div2);
			tt=dd.retResult();
			System.out.println(tt);
		}
		catch(DivException e)
		{
			System.out.println(e);
		}
        }
}
class DivException extends Exception
{
	double t;
	DivException(double t)
	{
		this.t=t;	
	}
	public String toString()
	{
		return "div1="+t+";div2 can not to 0!";
	}
}