Have an issue where, when clocks are moved due to a Daylight savings time (twice a year), dates are not correct in Java (I am based in Central Europe: GMT+2 in summer, GMT+1 in winter) If time is moved 1 hour ahead, new Date() still returns old time (1 hour behind of current time). In Java 7, can this be solved, without restarting the Jboss application servers? If I change the time manually
有地点,时间时钟,由于移动到夏令时(每年两次)的问题,日期是不正确的在Java中(我驻中欧: GMT+2 ,夏季GMT+1在冬季) 如果时间提前1小时移动, new Date()仍旧返回旧时间(比当前时间晚1小时)。 在Java 7中,这可以解决,而无需重新启动Jboss应用程序服务器? 如果我在Windows中手动更改时间,请重现此问题:除非重新启动jboss,否则Date不会更新到系统日期。 Calendar c = Calendar.getInstance(); c.setTime(new D
I'm having a lot of problems trying to implement an OAuth provider. I would like to know if anyone has successfully used an Oauth provider using Java? I found a lot of libraries but all of them are really bad commented and I cant work with them. I'm accepting any documentation that explains how an oauth provider should work and/or how implement it. Situation: I have some data in MyS
我在尝试实施OAuth提供商时遇到了很多问题。 我想知道是否有人成功地使用了一个使用Java的Oauth提供程序? 我发现了很多图书馆,但他们都很糟糕,我不能和他们合作。 我接受任何说明oauth提供者应该如何工作和/或如何实施的文档。 情况:我在服务器上的MySQL中有一些数据,我想授权“依赖方”通过OAuth访问,但我不知道如何执行此操作。 我假设你想用Oauth来保护你的服务器端服务? 你没有说你正在使用什么样的服务器端技
I use Spring WebMVC to provide a REST API. I use methods like @RequestMapping("/path({id}") void getById(@PathVariable("id") int id) {} methods. When the client incorrectly put a string instead of an integer id into the query, I get a NumberFormatException like: java.lang.NumberFormatException: For input string: "dojo" at java.lang.NumberFormatException.forInputStrin
我使用Spring WebMVC来提供一个REST API。 我使用类似的方法 @RequestMapping("/path({id}") void getById(@PathVariable("id") int id) {}方法。 当客户端错误地将一个字符串而不是一个整数id放入查询中时,我得到一个NumberFormatException: java.lang.NumberFormatException: For input string: "dojo" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
I am using a PreparedStatement with sql such as: String sql = "insert into foo (a,b,c) values (?,?,?)"; ps = conn.prepareStatement(sql); ps.setString(psIndex++, a); ps.setString(psIndex++, b); ps.setString(psIndex++, c); But if any of the variables is an empty string the resulting statement gets two single quotes. As in: VALUES ('foo','','') Then I get an except
我正在使用SQL的PreparedStatement ,如: String sql = "insert into foo (a,b,c) values (?,?,?)"; ps = conn.prepareStatement(sql); ps.setString(psIndex++, a); ps.setString(psIndex++, b); ps.setString(psIndex++, c); 但是,如果任何变量是空字符串,则结果语句会获得两个单引号。 如: VALUES ('foo','','')然后我得到一个异常,因为两个单引号是一个转义序列。 我无法相信通过
I need to create a Set with initial values. Set<String> h = new HashSet<String>(); h.add("a"); h.add("b"); Is there a way to do this in one line of code? There is a shorthand that I use that is not very time efficient, but fits on a single line: Set<String> h = new HashSet<>(Arrays.asList("a", "b")); Again, this is not time efficient since you are constructing an arr
我需要用初始值创建一个Set 。 Set<String> h = new HashSet<String>(); h.add("a"); h.add("b"); 有没有办法在一行代码中做到这一点? 我使用的速记不是非常省时,但适用于单行: Set<String> h = new HashSet<>(Arrays.asList("a", "b")); 同样,由于您正在构建数组,转换为列表并使用该列表创建集合,因此这不是时间有效的。 初始化静态最终集时,我通常会这样写: public static final Stri
Java 9 introduced new Collection Factory methods, List.of : List<String> strings = List.of("first", "second"); So, what's the difference between the previous and the new options? That is, what's the difference between this: Arrays.asList(1, 2, 3); and this: List.of(1, 2, 3); Arrays.asList returns a mutable list while the list returned by List.of is immutable: List<Intege
Java 9引入了新的Collection Factory方法List.of : List<String> strings = List.of("first", "second"); 那么,以前的和新的选择有什么区别? 也就是说,这有什么区别: Arrays.asList(1, 2, 3); 和这个: List.of(1, 2, 3); Arrays.asList返回一个可变列表,同时通过返回的列表List.of是不可改变的: List<Integer> list = Arrays.asList(1, 2, null); list.set(1, 10); // OK List<Integer> list
Is it possible to remove intent filters from activity based on user preference? Say dial intent filter is added and then at later point of time user decides the application should not handle dial. Edit: Removed add part in question description No, it seems they are static. An intent filter is an instance of the IntentFilter class. However, since the Android system must know about the capa
是否有可能根据用户偏好从活动中移除意图过滤器? 说拨号意图过滤器被添加,然后在稍后的时间点用户决定应用程序不应该处理拨号。 编辑:删除添加问题描述部分 不,看起来他们是静态的。 意图过滤器是IntentFilter类的一个实例。 但是,由于Android系统在启动该组件之前必须了解组件的功能,因此意图过滤器通常不是在Java代码中设置的,而是在应用程序的清单文件(AndroidManifest.xml)中设置为元素。 资料来源:http
I've always wanted to write a simple world in Java, but which I could then run the 'world' and then add new objects (that didn't exist at the time the world started running) at a later date (to simulate/observe different behaviours between future objects). The problem is that I don't want to ever stop or restart the world once it's started, I want it to run for a week wi
我一直想用Java编写一个简单的世界,但我可以运行“世界”,然后在以后的日期添加新的对象(在世界开始运行时不存在)(模拟/观察未来物体之间的不同行为)。 问题在于,我不希望在开始之前停止或重新启动世界,我希望它运行一周而不必重新编译它,但可以放入对象并重做/重写/删除/创建/随时间变化。 这个世界可能就像一个10×10的x / y'地点'阵列(想象棋盘)一样简单,但我想会需要某种ticktimer过程来监视对象并给每
I'm trying to change between activities in my Android app (2.1-update1), but it doesn't work. Any suggestions? The only thing that happens when I debug the app is that it stops on this part of the code in Instrumentation.java: public void waitForIdle() { synchronized (this) { while (!mIdle) { try { wait();
我试图改变我的Android应用程序(2.1-update1)中的活动,但它不起作用。 有什么建议么? 我调试应用程序时发生的唯一情况是,它停在Instrumentation.java中这部分代码上: public void waitForIdle() { synchronized (this) { while (!mIdle) { try { wait(); } catch (InterruptedException e) { }
I have a Java EE application and I want to validate a Date. With a String I do this: import javax.validation.constraints.NotNull; import javax.validation.constraints.Size; ... @NotNull @Size(min = 1, max = 255) private String myString; But now I have two dates which I want to validate. The user can in the frontend system write a String in a text field which will be transferred via JSON (I hav
我有一个Java EE应用程序,我想验证日期。 用一个字符串我这样做: import javax.validation.constraints.NotNull; import javax.validation.constraints.Size; ... @NotNull @Size(min = 1, max = 255) private String myString; 但是现在我有两个我想要验证的日期。 用户可以在前端系统中的文本字段中写入一个字符串,通过JSON传输(我必须使用文本字段,我不能使用日期选择器)。 所以我的后端确实在我的域类中有这个: