异常处理的变形

package cn.itcast_10;
/*
 * try...catch...finally变形
 *     A:try....catch...finally
 *     B:try...catch
 *     C:try...catch...catch..
 *     D:try...catch...catch..finally
 *     E:try...finally  这种做法的目的是释放资源
 * 
 * 
 */