try6.java.bak

这是java实例的书上例题

public class Try6
{
    public void calc(int k) throws Exception //抛出异常
    {
        int  y=1,i=1;
        System.out.print(k+"!=");
        for (i=1;i<=k;i++)
        {
            if(y>Integer.MAX_VALUE/i)
                throw new Exception("overflow");
            else
                y = y * i;
        }
        System.out.println(y);
    }
    public void run(int k)                   //捕获并处理异常
    {
        try
        {
            calc(k);
        }
        catch(Exception e)
        {
            System.out.println("exception: "+e.getMessage());
            e.printStackTrace();
            System.exit(0);
        }
    }
    public static void main (String args[])
    {
        Try6 a = new Try6();
        for (int i=1;i<20;i++)
            a.run(i);
    }
}