Android SDK installation doesn't find JDK

I'm trying to install the Android SDK on my Windows 7 x64 System. jdk-6u23-windows-x64.exe is installed, but the Android SDK setup refuses to proceed, because it doesn't find the JDK installation. Is this a known issue? And is there a solution? Press Back when you get the notification and then Next . This time it will find the JDK . Actual SETUP: OS: Windows 8.1 JDK file: jdk

Android SDK安装没有找到JDK

我试图在我的Windows 7 x64系统上安装Android SDK。 jdk-6u23-windows-x64.exe ,但Android SDK安装程序拒绝继续,因为它找不到JDK安装。 这是一个已知的问题? 有没有解决方案? 当您收到通知后按返回 ,然后按下一步 。 这次它会找到JDK 。 实际设置: 操作系统:Windows 8.1 JDK文件:jdk-8u11-windows-x64.exe ADT文件:installer_r23.0.2-windows.exe 安装x64 JDK,并首先尝试后退选项,然后尝试像设置错

JPA 2 @SequenceGenerator @GeneratedValue producing unique constraint violation

Problem Overview At seemingly random times we get an exception "postgresql duplicate key violates unique constraint." I do think I know what our problem"s" are but I don't want to make changes to the code without having a reproducible test case. But since we haven't been able to reproduce it in any environment other than randomly in production, I'm asking assis

JPA 2 @SequenceGenerator @GeneratedValue产生唯一的约束违规

问题概述 在看似随机的时候,我们得到一个异常“postgresql重复键违反了唯一约束”。 我确实认为我知道我们的问题是什么,但我不想在没有可重复的测试用例的情况下对代码进行更改。 但是由于我们无法在任何环境中复制它,除了随机生产外,我要求SO提供援助。 在这个项目中,我们有多个postgres数据库,并为每个数据库中的每个表配置一个主键序列。 这些序列是这样创建的: create sequence PERSONS_SEQ; create sequence VI

Download a file with Android, and showing the progress in a ProgressDialog

I am trying to write a simple application that gets updated. For this I need a simple function that can download a file and show the current progress in a ProgressDialog . I know how to do the ProgressDialog , but I'm not sure how to display the current progress and how to download the file in the first place. There are many ways to download files. Following I will post most common ways;

使用Android下载文件,并在ProgressDialog中显示进度

我正在尝试编写一个更新的简单应用程序。 为此,我需要一个简单的函数,可以下载一个文件并在ProgressDialog显示当前的ProgressDialog 。 我知道如何做ProgressDialog ,但我不确定如何显示当前进度以及如何首先下载文件。 有很多方法可以下载文件。 以下我将发布最常见的方式; 您需要决定哪种方法更适合您的应用。 1.使用AsyncTask并在对话框中显示下载进度 此方法将允许您执行一些后台进程并同时更新UI(在这种情况

How to turn off the Eclipse code formatter for certain sections of Java code?

I've got some Java code with SQL statements written as Java strings (please no OR/M flamewars, the embedded SQL is what it is - not my decision). I've broken the SQL statements semantically into several concatenated strings over several lines of code for ease of maintenance. So instead of something like: String query = "SELECT FOO, BAR, BAZ FROM ABC WHERE BAR > 4"; I have somethin

如何关闭某些Java代码段的Eclipse代码格式化程序?

我有一些Java代码,用SQL语句写成Java字符串(请不要使用OR / M flamewars,嵌入式SQL就是这样 - 不是我的决定)。 为了便于维护,我已将SQL语句语义分解为多行代码中的几个连接字符串。 所以不是这样的: String query = "SELECT FOO, BAR, BAZ FROM ABC WHERE BAR > 4"; 我有这样的东西: String query = "SELECT FOO, BAR, BAZ" + " FROM ABC " + " WHERE BAR > 4 "; 这种风格使SQL

Max value of Xmx and Xms in Eclipse?

Now my settings for these in the ini file are: -Xms768M -Xmx1024M When setting them higher, eclipse doesn't start anymore... Is there a way to increase these values without eclipse crashing? The maximum values do not depend on Eclipse, it depends on your OS (and obviously on the physical memory available). You may want to take a look at this question: Max amount of memory per java pro

Eclipse中Xmx和Xms的最大值?

现在我在ini文件中的这些设置是: -Xms768M -Xmx1024M 当把它们设置得更高时,eclipse不会再启动了......有没有办法在没有发生eclipse崩溃的情况下增加这些值? 最大值不依赖于Eclipse,它取决于您的操作系统(显然在可用的物理内存上)。 你可能想看看这个问题:Windows中每个Java进程的最大内存量? 我猜你正在用32位JVM使用32位日食。 它不会允许超出您指定的范围。 使用带有64位JVM的64位Eclipse可帮助您启动带

JAXBException: not a valid property on class

We have an application which needs to consume an external web service. To do this we have generated the set of Java artifacts from the WSDL via Maven using the wsdl2java goal provided by the cxf-codegen-plugin plugin. In the application we want to set the endpoint to use for the web service call at runtime (to cater for different web service endpoint URLs in test environments) and so have writ

JAXBException:不是类上的有效属性

我们有一个需要使用外部Web服务的应用程序。 为此,我们使用cxf-codegen-plugin插件提供的wsdl2java目标,通过Maven从WSDL生成一组Java工件。 在应用程序中,我们希望设置端点以用于运行时的Web服务调用(以满足测试环境中不同的Web服务端点URL),因此我们已经编写了一些如下代码来为我们执行此操作: private <T> T createServiceObject(final Class<T> p_seiClass) throws MalformedURLException { f

JSP tricks to make templating easier?

At work I've been tasked with turning a bunch of HTML files into a simple JSP project. It's really all static, no serverside logic to program. I should mention I'm completely new to Java. JSP files seem to make it easy to work with common includes and variables, much like PHP , but I'd like to know a simple way to get something like template inheritance ( Django style) or at le

JSP技巧使模板更容易?

在工作中,我负责将一堆HTML文件转换为一个简单的JSP项目。 它实际上都是静态的,没有用于编程的服务器逻辑。 我应该提到我对Java完全陌生。 JSP文件似乎可以很容易地处理常见的包含和变量,就像PHP一样,但我想知道一个简单的方法来获得像模板继承( Django样式)或至少能够获得base.jsp包含页眉和页脚的文件,以便稍后插入内容。 Ben Lings似乎在他的回答中提供了一些希望:JSP模板继承有人可以解释如何实现这一点? 考

Useful Eclipse Java Code Templates

You can create various Java code templates in Eclipse via Window > Preferences > Java > Editor > Templates eg sysout is expanded to: System.out.println(${word_selection}${});${cursor} You can activate this by typing sysout followed by CTRL+SPACE What useful Java code templates do you currently use? Include the name and description of it and why it's awesome. There

有用的Eclipse Java代码模板

您可以在Eclipse中通过创建各种Java代码模板 窗口>首选项> Java>编辑器>模板 例如 sysout被扩展为: System.out.println(${word_selection}${});${cursor} 你可以通过输入sysout然后按CTRL+SPACE来激活它 你目前使用哪些有用的Java代码模板? 包括它的名称和描述以及为什么它很棒。 对于原始/新颖的模板使用而不是内置的现有功能,有一个开放的赏金。 创建Log4J记录器 显示swt颜色 Syncexec -

How to send HTTP request in java?

This question already has an answer here: How to use java.net.URLConnection to fire and handle HTTP requests 12 answers You can use java.net.HttpUrlConnection. Example (from here), with improvements. Included in case of link rot: public static String executePost(String targetURL, String urlParameters) { HttpURLConnection connection = null; try { //Create connection URL url =

如何在Java中发送HTTP请求?

这个问题在这里已经有了答案: 如何使用java.net.URLConnection来触发和处理HTTP请求12个答案 你可以使用java.net.HttpUrlConnection。 示例(从这里),有改进。 包含在链接的情况下: public static String executePost(String targetURL, String urlParameters) { HttpURLConnection connection = null; try { //Create connection URL url = new URL(targetURL); connection = (HttpURLConnection)

Newline in JLabel

How can I display a newline in JLabel ? For example, if I wanted: Hello World! blahblahblah This is what I have right now: JLabel l = new JLabel("Hello World!nblahblahblah", SwingConstants.CENTER); This is what is displayed: Hello World!blahblahblah Forgive me if this is a dumb question, I'm just learning some Swing basics... 围绕与所述串<html></html>并用破线<br/

JLabel的Newline

如何在JLabel显示换行符? 例如,如果我想要: 你好,世界! 等等等等等等 这就是我现在所拥有的: JLabel l = new JLabel("Hello World!nblahblahblah", SwingConstants.CENTER); 这是显示的内容: Hello World!blahblahblah 原谅我,如果这是一个愚蠢的问题,我只是在学习一些Swing基础知识...... 围绕与所述串<html></html>并用破线<br/> 。 JLabel l = new JLabel("<html>Hello Worl