用系统计划任务调用java

直接写批处理文件  run.bat 内容: java   hello 执行没有问题的 但是用系统的计划任务调用就报错:NoClasses的那种报错   后来改jar来运行 run.bat内容 java -jar hello.jar 直接运行没问题的 但是用系统的计划任务就报错:Unable to access jarfile         ps: java -jar h.jarpause***********************可以一直打开黑窗口,便于调试   @echo off*******************************可以不出现黑…

JDK1.8 连接Access数据库

JDK1.8 连接Access数据库 JDBC (JavaDB Connection)---Java数据库连接 JDBC是一种可用于执行SQL语句的JAVA API------推荐文章 http://blog.csdn.net/ljheee/article/details/50988796 JDK1.8增加了很多新特性,但不再包含access桥接驱动,因此在连接Access数据库时有所变化[和JDK1.6相比]. 一、 设置数据源(ODBC) 步骤:控制面板->系统安全->管理工具->数据源(ODBC) [针对Window 32位] 1.添…

jar 怎么打包、怎么运行jar文件

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怎么打包 (1)Eclipe打包; 选择要打jar包的java工程;鼠标右击-->>选择Export...-->>选择java-->>选择JAR file-->>点击next-->>在JAR file:中选择要保存的路径和要保存jar包名(包名不能出现空格)-->>最后,finish;怎么运行jar cmd 找到jar文件所在的文件下 java -jar *.jar 后提示unable to access jarfile 如果报错,看看MANIFEST.MF这个文件里有没有给Main-Class指定主类

The manifest file of OSGI bundle

Every OSGI bundle is a jar file,and before you compress the bundle to a jar file, a configuration file is necessary,the following is a configuration file example.it is very simple.it belongs to .mf format configuration file. file manifest.mf Bundle-Activator: test.ActivatorBundle-Name: simplebundleBundle-SymbolicName: simplebundleBundle-Description: Demo BundleBundle-Ve…

android基本概念_What is Android

What is Android? Android is a software stack for mobile devices that includes an operating system, middleware and key applications. The Android SDK provides the tools and APIs necessary to begin developing applications on the Android platform using the Java programming language. Features Application framework enabling reuse and replacement of components Dalvik virtual m…

listView显示对象以及access any RESTFull service that uses JSON

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    ><ListView    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:id="@+id/lstText"    /></…

Ensuring the Presence of the JRE Software

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Rich Internet applications (RIAs) usually need a minimum version of the Java Runtime Environment (JRE) software to be present on the client machine. When deploying a RIA, you need to ensure that client machines have the required version of the JRE software so that your RIA can function well. With the Deployment Toolkit script, you have at least two ways to handle this r…

Eclipse问题Access restriction: The type ‘SunJCE’ is not API 解决,并加深理解/jre与/jdk目录下jre的区别

Eclipse问题Access restriction: The type ‘SunJCE’ is not API 解决,并加深理解/jre与/jdk目录下jre的区别 今天写程序的时候遇到了一个编译问题 Access restriction: The type 'SunJCE' is not API (restriction on required library 'D:\Program Files\Java\jdk1.7.0_79\jre\lib\ext\sunjce_provider.jar') 经探索发现了一个解决方法。从报错信息中可以看出我使用的Java Runtime Environment(Jav…

关于Access restriction: The type Hashtable is not accessible due to restriction的解决方案

解决方案1(推荐):只需要在project build path中先移除JRE System Library,再添加库JRE System Library,重新编译后就一切正常了。 解决方案2: Windows -> Preferences -> Java -> Compiler -> Errors/Warnings -> Deprecated and trstricted API -> Forbidden reference (access rules): -> change to warning

eclipse:Access restriction Error

在搭建项目环境时出现了以下编译错误:Access restriction: The constructor SunJCE() is not accessible due to restriction on required library J:\jdk\jre\lib\ext\sunjce_provider.jar访问限制:由于J:\jdk\jre\lib\ext\sunjce_provider.jar库的限制,SunJCE() 构造函数不可访问。 在网上搜了一下,解决办法是修改编译选项,方法如下:Window -> Preferences -> Java -> Compiler ->…

Access restriction: The type BASE64Encoder is not accessible due to restriction on required library

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Access restriction: The type 'BASE64Encoder' is not API (restriction on required library 'D:\Java\jdk1.6.0_43\jre\lib\rt.jar') eclipse引入import sun.misc.BASE64Encoder; 是红叉,怎么解决? 右键项目,点属性(Properties); 2.java bulid path-->Libraries-->jre System Library; 3.Access Rules-->Edit; 4.Add,resolution选择accessible,下面填上** 点击确定即可! 到这里就好了

先移除JRE System Library,再添加库JRE System Library

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osgi bundle import sun.misc.BASE64Decoder;可是Eclipse提示:Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:\Program files\java\jre6\lib\rt.jar Access restriction : The constructor BASE64Decoder() is not accessible due to restriction on required library C:\Program files\java\jre6\lib\rt.jar 搞不懂是为什么,最后在http…

Microsoft .NET Development Platform的Linux版本出现

Microsoft .NET development platform的Linux版本(Mono)出现。 一家叫Ximian的公司在2001-07-09宣布了Mono project启动,这将是一个Microsoft .NET development platform的Linux版本,整个Mono project主要是C#的编译器、CLR和JIT,并承诺包括一整套类库。从而使得开发.NET 应用可以在Windows和Mono支持的系统(Linux,Unix)中运行,更重要的是Mono的目标是致力于建立不依赖操作系统的应用程序,…

Java关于JIT的原理和相关知识

今天在读java.awt.Toolkit类时,遇到了JIT,代码如下:/** * Gets the default toolkit. * <p> * If a system property named <code>"java.awt.headless"</code> is set * to <code>true</code> then the headless implementation * of <code>Toolkit</code> is used. * <p> * If there is no <code>"java.awt.headless"</code> or it i…
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