Difference between string object and string literal

This question already has an answer here: What is the difference between “text” and new String(“text”)? 9 answers When you use a string literal the string can be interned, but when you use new String("...") you get a new string object. In this example both string literals refer the same object: String a = "abc"; String b = "abc"; System.out.println(a == b); // true Here, 2 di

字符串对象和字符串文字之间的区别

这个问题在这里已经有了答案: “text”和新的String(“text”)之间有什么区别? 9个答案 当你使用字符串文字时,字符串可以被拦截,但是当你使用new String("...")你会得到一个新的字符串对象。 在这个例子中,两个字符串文字都引用同一个对象: String a = "abc"; String b = "abc"; System.out.println(a == b); // true 这里创建了2个不同的对象,它们具有不同的引用: String c = new String("abc"); St

Implementing Incompatible Interfaces

This question already has an answer here: interface and inheritance: “return type int is not compatible” 4 answers I don't believe that's possible in this particular case. If both classes returned Object types you'd have some chance, but since you're mixing basic and object types, there's no compatible type that would support both interfaces. A different approach may be

实现不兼容的接口

这个问题在这里已经有了答案: 接口和继承:“返回类型int不兼容”4个答案 我不相信在这种特殊情况下这是可能的。 如果这两个类都返回了Object类型,那么您就有机会了,但由于您混合了基本类型和对象类型,因此没有可支持这两种接口的兼容类型。 一种不同的方法可能是实现适当的适当接口,然后使用组合来存储内部结构并根据需要映射函数调用。 这会假设你不需要满足或者可以同时用作这两个接口,而是特别需要揭示一个接口

Looking for the timeout properties of native java CORBA on the client

I am using CORBA (ORB) which natively comes with Java , no third party libraries are used. I'm in need of the CORBA client Properties for timeouts , in order set a timeout on the client's side and limit the amount of time which the connection stays open; it should be set for all scenarios, to limit the maximum request time: Initializing connection Rebinding a connection The total

寻找客户端上本地java CORBA的超时属性

我使用的是原生自带Java的 CORBA (ORB),不使用第三方库。 我需要超时的CORBA客户端属性 ,以便在客户端设置超时并限制连接保持打开的时间; 应该为所有情况设置,以限制最大请求时间: 初始化连接 重新绑定连接 总请求时间 我正在测试睡眠服务器(在服务器方法逻辑中),并且客户端根本没有超时 。 在网上找到适当的文档非常困难; 我试图使用以下所有属性,但无济于事: aProperties.put(“com.sun.CORBA.tran

Animate Android Ring Shape's sweep angle

Attempting to animate the Android Ring Shape to produce an effect similiar to the shown sequence of images. I have found the Shape Drawable type of Ring. <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="ring" android:innerRadius="75dp" android:thickness="25dp" android:useLevel="false"> Along with the ArcShape(startAngle, sweepAngle) method. ShapeDrawable

为Android Ring Shape的扫掠角设置动画

尝试对Android Ring形状进行动画处理,以产生与所示图像序列类似的效果。 我找到了Shape Drawable类型的戒指。 <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="ring" android:innerRadius="75dp" android:thickness="25dp" android:useLevel="false"> 随着ArcShape(startAngle,sweepAngle)方法。 ShapeDrawable shape = new ShapeDrawable(new ArcShape(0, 360)); shape.

How to align components center in the JPanel using GridBagLayout?

When I try to align my component it goes either left side or right side. So I just want the solution to get rid of this problem, and also tell me how set the size of the panel as 400 x 350 pixel. Here is my code.... titleLabel and ResultLabel should be aligned in center public TimeGui() { layout = new GridBagLayout(); setSize(400, 350); //**Its not working** setBackground(Color

如何使用GridBagLayout对齐JPanel中的组件中心?

当我尝试对齐我的组件时,它会左转或右转。 所以我只想要解决方案摆脱这个问题,并告诉我如何将面板的大小设置为400 x 350像素。 这是我的代码.... titleLabel和ResultLabel应该在中心对齐 public TimeGui() { layout = new GridBagLayout(); setSize(400, 350); //**Its not working** setBackground(Color.LIGHT_GRAY); setBorder(BorderFactory.createLineBorder(Color.BLACK)); setBorder(new Tit

java.io.IOException : No authentication challenges found

I am newbie to android and this is my first project on android. I am struggling with "authentication" problem for more than a day. I tried several options but none of them worked. Basically, I want to call a REST API and get response. I am sure that there is no problem in API as I use the same one in another iOS application. I pass authorization header but still authentication no

java.io.IOException:未找到认证挑战

我是Android的新手,这是我在android上的第一个项目。 我在“认证”问题上挣扎了一天以上。 我尝试了几个选项,但都没有工作。 基本上,我想调用一个REST API并获得响应。 我相信在API中没有问题,因为我在另一个iOS应用程序中使用了相同的问题。 我通过了授权头,但仍然没有找到认证消息。 我发现在与此有关的stackoverflow几个问题,但其中一些没有工作,有些对我没有意义。 我得到状态代码401 。 我知道这意味着要么

How to slide a view in and out in android

I'm trying to make a view (Linear view with some buttons in - R.id.playerControl ) slide in and out based on the context of other events in the activity. For this purpose I've got a selectMediaItem method which should show or hide the view when the user selects or deselects an item respectively. I'm new with animation in android and I'm having trouble getting this to work for

如何在android中滑入和滑出视图

我试图根据活动中的其他事件的上下文来制作一个视图(带有一些按钮的线性视图R.id.playerControl )。 为此我有一个selectMediaItem方法,当用户分别选择或取消选择一个项目时,它应该显示或隐藏视图。 我是新的动画在Android中,我有麻烦得到这个工作有两个原因: 该视图在动画时间之外保持在屏幕上,所以当它完成滑动时,它会跳回去 - 然后当它被请求滑入时跳出来滑回。 随着视图消失,屏幕上有一个永久的黑色空间。

Spring web services flow

I am new to spring web services and after writing a sample program for a factorial service I am left with some doubts. I think this is how spring web-services work: Application run on server and generates a request --> Request goes to dispatcher servlet as defined in web.xml --> dispatcher servlet looks for [servlet-name]-servlet.xml --> dispatcher servlet then looks for payloadroot w

Spring web服务流

我是春季Web服务的新手,在为阶乘服务编写示例程序之后,我留下了一些疑问。 我认为这是春季Web服务的工作原理: 应用程序在服务器上运行并生成一个请求 - >请求发送到web.xml中定义的调度程序servlet - >调度程序servlet查找[servlet-name] -servlet.xml - >调度程序servlet然后查找payloadroot,正确的端点 - > xml请求到达终点 - >响应由端点生成 现在我的疑惑是: 到端点的请求如何以XML形式出现?

Several messages programmatically in JSF

I've got two places to put messages in my website. Messages related with an aside div and messages related with the main container. I'm using this two h:messages simultaneusly within the same page (it's forms have prependId=false and no id so messages ids are not appended with others): <h:messages id="container-messages" infoClass="info-message" warnClass="warn-message" errorCl

在JSF中以编程方式发送几条消息

我有两个地方可以在我的网站上发布消息。 与旁边div相关的消息以及与主容器相关的消息。 我在同一页面内同时使用这两个h:消息(它的形式有prependId = false,没有id,所以消息id不会附加到其他消息中): <h:messages id="container-messages" infoClass="info-message" warnClass="warn-message" errorClass="error-message" globalOnly="false" /> <h:messages id="aside-messages" infoClass="info-message" w

User input validation in managed bean problem(JSF 2.0 )

I am having some problems when i try to validate the user input from my JSF, in a managed beans. I recive the validation message in the console, but i dont see it in the page. I dont understand where is the problem. This is the console output: INFO: Inside validation method!! INFO: NO MATCH!!! INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver

托管bean问题(JSF 2.0)中的用户输入验证

当我尝试从托管的bean中验证来自JSF的用户输入时,我遇到了一些问题。 我在控制台中收回验证消息,但我没有在页面中看到它。 我不明白问题在哪里。 这是控制台输出: 信息:内部验证方法! 信息:没有匹配! INFO:实例化org.hibernate.validator.engine.resolver.JPATraversableResolver的一个实例。 信息:警告:FacesMessage(s)已被排队,但可能没有被显示。 sourceId = bRegForm:name [severity =(INFO 0),s