myexception.java

异常处理的一个类

//**************************************
// Name: user thrown exception
// Description:Shows how to throw and catch user defined exception.
// By: Suhail
//
//
// Inputs:None
//
// Returns:None
//
//Assumes:None
//
//Side Effects:None
//This code is copyrighted and has limited warranties.
//Please see http://www.Planet-Source-Code.com/xq/ASP/txtCodeId.3358/lngWId.2/qx/vb/scripts/ShowCode.htm
//for details.
//**************************************

//This program creates a custom exception type.
class MyException extends Exception


    {
    private int detail;
    MyException(int a)


        {
        detail = a;
    }
    public String toString()


        {
        return "MyException[" + detail + "]";
    }
}
public class usrexception


    {
    public static void compute(int a) throws MyException


        {
        System.out.println("Called compute(" + a + ")");
        if(a > 10)
        throw new MyException(a);
        System.out.println("Normal exit");
    }
    public static void main(String args[])


        {
        try


            {
            compute(1);
            compute(20);
        }catch(MyException e){System.out.println("Caught " + e);}
    }
}