-
EVC3.0 create the MDI procedures
在EVC3.0中创建MDI程序-EVC3.0 create the MDI procedures
- 2022-08-06 06:31:48下载
- 积分:1
-
java异常处理
3.8 异常处理
什么是异常
知道Java异常分类
处理异常的两种方式
throw和throws区别
如何创建自定义异常
概念:
在程序中,可能产生程序员没有预料到的各种错误情况,比如打开一个不存在的文件等,在Java中,这种在程序运行时可能出现的错误称为异常。
异常可以把“描述在正常执行过程中做什么事”的代码和“出了问题怎么办”的代码相分离
例子:demo05.ExceptionDemo.java
Java异常分类A:
java.lang.Error,java.lang.Exception
Error(错误):jvm系统内部错误、资源耗尽等严重问题,发生Error时,编程人员无能 为力,只能终止程序,例如内存溢出等。
Exception(异常):因编程错误或偶然的外在因素导致的一般性问题,例如:对负数 开平方根、空指针访问等,当发生Exception 时,编程人员可以做出处理,并做出人性 化响应,比如弹出窗口,显示“请不要输入负数!”。
异常分类B:
检查性异常:编译器必须处理的异常,该类异常通常是Exception类型或其子类(RuntimeException类除外)//运行时异常
SQLException、IOException、ClassNotFoundException
例子:/DemoProject/src/com/hyg/demo08/FileInputStreamDemo.java
非检查性异常:编译器不要求强制处理的异常,RuntimeException类及其所有子类都是非检查性异常。
NullPointerException、ClassCastException
例子:equa
- 2022-02-14 14:02:16下载
- 积分:1
-
很棒哦,快看看吧
很棒哦,快看看吧-it is very good,look at it.
- 2022-10-13 16:00:03下载
- 积分:1
-
给代码暂停把他防止瞬时检测调试器调试器…
Give the code pause to attach him to debuger to prevent detecting debuger instance
- 2022-03-06 22:53:29下载
- 积分:1
-
This one a typical one number value issue, is it is it belong to algorithm ask a...
这是一个典型的非数值问题,如果使用非递归算法求解此问题,要设计复杂的算法,编写很长的程序。而使用递归算法可以使整个算法清晰,使程序简洁。本问题分析并建立递归算法的过程是典型的抽取问题本质、建立递归算法 并最终解决非数值问题递归实例。-This one a typical one number value issue, is it is it belong to algorithm ask and solve this question to pass to use, design the complicated algorithm , will write very long procedure . It can make the whole algorithm clear and use and pass and belong to the algorithm, make the procedure succinct . Case study this is it is it belong to course of algorithm typical extraction issue essence , is it pass algorithm of belonging to to set up to pass to set up And it is not a number value problem to solve finally and pass and belong to the instance
- 2022-05-23 18:27:16下载
- 积分:1
-
331 with a mirror toner cartridges Sadishike disciplinary deduction genoa Xhosa
五子棋带镜粉盒撒迪斯科风纪扣三角帆科萨机 桑卡达芬奇撒可富机萨迪克帆脚索开放剂可迪斯科帆脚索抗倒伏加速卡迪斯科帆脚索嵌金 萨迪克帆脚索开放剂科萨机 抗毒素风纪扣速度计发萨迪克第四纪发卡羧基端开放剂撒可计算达芬奇科萨戴假发卡羧基端发科萨达芬奇撒可富机 强的松开放剂科萨机发 -331 with a mirror toner cartridges Sadishike disciplinary deduction genoa Xhosa-cab can be rich green in Aisa-foot cable Sadiq sails open disco agent can sail foot cable Lodging Resistance Accelerator disco sails foot cable gold inlay Sadiq sails foot cable for open Xhosa anti-toxin disciplinary deduction speed made Sadiq Quaternary issuing agent open the carboxyl terminus of dollars may withdraw counting DUFFING Aikesa wearing wigs card carboxy-terminal can be made Cossa Fenaisa Fu-dose prednisone open Xhosa-fat
- 2022-04-02 01:13:59下载
- 积分:1
-
Windows下的一个worm源代码
Windows下的一个worm源代码-A worm under the Windows source code
- 2022-05-17 10:08:24下载
- 积分:1
-
小广告程序请使用
小广告程序请使用-small advertising programs use
- 2023-08-21 10:25:04下载
- 积分:1
-
#用来修改数据的脚本文件,可以将不同的格式的文件用perl统一到一起。...
#用来修改数据的脚本文件,可以将不同的格式的文件用perl统一到一起。-used to revise the script file data can be a different format documents perl reunification together.
- 2023-04-11 09:45:04下载
- 积分:1
-
e book on statistical signal processing.
e book on statistical signal processing.
- 2023-05-08 08:15:03下载
- 积分:1