Java's NumberFormat is 1) non thread-safe (which can be worked around with a ThreadLocal ); 2) inconvenient to use correctly for the simplest use case when I know whether the string should contain int, long, or double, and want an API like: int parseInt(String str, Locale locale) throws ParseException; int parseInt(String str, int defaultValue, Locale locale); long parseLong(String str, Lo
Java的NumberFormat是1）非线程安全的（可以用ThreadLocal ）; 2）当我知道字符串是否应该包含int，long或double，并且需要一个API时，最简单的用例不便正确使用： int parseInt(String str, Locale locale) throws ParseException; int parseInt(String str, int defaultValue, Locale locale); long parseLong(String str, Locale locale) throws ParseException; long parseLong(String str, long defaultValue, Locale loc
I'm using JPA, hibernate 3. String sqlQuery = " FROM TraceEntityVO where lotNumber =:lotNumber and mfrLocId=:mfrLocId and mfrDate=:mfrDate and qtyInitial=:qtyInitial and expDate=:expDate"; Query query = entityManager.createQuery(sqlQuery) .setParameter("lotNumber", traceEntityVO.getLotNumber()) .setParameter("mfrLocId", traceEntityVO.getMfrLocId())
我正在使用JPA，休眠3。 String sqlQuery = " FROM TraceEntityVO where lotNumber =:lotNumber and mfrLocId=:mfrLocId and mfrDate=:mfrDate and qtyInitial=:qtyInitial and expDate=:expDate"; Query query = entityManager.createQuery(sqlQuery) .setParameter("lotNumber", traceEntityVO.getLotNumber()) .setParameter("mfrLocId", traceEntityVO.getMfrLocId()) .se
I'm developing project on javacv and I need to know how to identify following image and fill that Image using particular color ? I try to go through this question and This is the image that I use I try to go through this code and I developed a code in javacv import com.googlecode.javacpp.Loader; import com.googlecode.javacv.CanvasFrame; import static com.googlecode.javacpp.Loader.*; impo
我正在开发javacv项目，我需要知道如何识别下面的图像，并使用特定的颜色填充图像？ 我尝试通过这个问题，这是我使用的图像 我尝试通过这段代码，并在javacv中开发了一个代码 import com.googlecode.javacpp.Loader; import com.googlecode.javacv.CanvasFrame; import static com.googlecode.javacpp.Loader.*; import static com.googlecode.javacv.cpp.opencv_core.*; import static com.googlecode.javacv.cpp.opencv_hi
I'm wondering how an abstract class with generics would handle with JPA? I mean what kind of annotations do I need for the field? Consider these: @MappedSuperclass public abstract class AbstractMyClass<T> { // What about Strings and Integers? Do I need some kind of @LOB? private T field; public T getField() { return field; } public void setField(T field) { this.f
我想知道一个带泛型的抽象类如何处理JPA？ 我的意思是我需要什么类型的注释？ 考虑这些： @MappedSuperclass public abstract class AbstractMyClass<T> { // What about Strings and Integers? Do I need some kind of @LOB? private T field; public T getField() { return field; } public void setField(T field) { this.field = field; } } 然后这些 @Entity @Table(name = "String") pub
I'm a fan of the try/do (or trier/doer) pattern, which is best implemented in C# using out parameters, eg: DateTime date; if (DateTime.TryParse("2012-06-18", out date)) { //Do something with date } I'm currently working on a Java 1.5 project, for which I'm implementing the try/do pattern using a new class called TryResult which is returned from any methods which implement the tr
我是try / do（或trier / doer）模式的粉丝，最好在C＃中使用out参数来out ，例如： DateTime date; if (DateTime.TryParse("2012-06-18", out date)) { //Do something with date } 我目前正在开发一个Java 1.5项目，为此我正在使用一个名为TryResult的新类实现try / do模式，该类是从任何实现try / do模式的方法返回的： public class TryResult<ResultType> { private boolean mSuccess = false; privat
I wondered if Java7's new invokedynamic bytecode instruction could be used to implement multiple dispatch for the Java language. Would the new API under java.lang.invoke be helpful to perform such a thing? The scenario I was thinking about looked as follows. (This looks like an application case for the visitor design pattern, but there may be reasons that this is not a viable option.) cl
我想知道Java7的新的invokedynamic字节码指令是否可以用来实现Java语言的多重分派。 java.lang.invoke下的新API有助于执行这样的事情吗？ 我想到的情景如下所示。 （这看起来像访问者设计模式的应用案例，但可能有这样的理由，这不是一个可行的选择。） class A {} class A1 extends A {} class A2 extends A {} class SomeHandler { private void doHandle(A1 a1) { ... } private void doHandle(A2 a2) { ... }
I'm looking for an efficient Java library (or even a function) to perform the infamous Exact Binomial Test. Something similar to the R function "binom.test" described here. Can you help me? Thanks a lot! :-) In addition to the BinomialDistribution Apache commons.math3 3.3 (unreleased at the moment of writing) has a BinomialTest that will get you the p-value as well as Binomia
我正在寻找一个高效的Java库（甚至是一个函数）来执行臭名昭着的精确二项式测试。 类似于这里描述的R函数“binom.test”。 你可以帮我吗？ 非常感谢！ :-) 除了BinomialDistribution之外，Apache commons.math3 3.3（在撰写的时候还没有发布）有一个BinomialTest，它将为您提供p值以及BinomialConfidenceInterval。 与你命名的统计R包相比，这并不多，但它不仅仅是上面提到的分布。 在我登陆你的问题时发帖，寻找一种方
I am trying to do the opposite of: JAXB - Ignore element That is I'm trying to parse XML with JAXB to a POJO and I want to JAXB to fail if it does NOT find a matching Java property for a given element. I know I could probably do schema validation but I would rather not do that. Example: @XmlRootElement(name="Dog") public class Dog { private String name; public String getName() {
我正试图做相反的事情：JAXB - 忽略元素 这是我想用JAXB解析XML的POJO，我想JAXB如果它没有找到一个给定元素匹配的Java属性失败。 我知道我可以做架构验证，但我宁愿不这样做。 例： @XmlRootElement(name="Dog") public class Dog { private String name; public String getName() {return name;} public String setName(String name) {this.name = name}; } 这个XML会失败： <Dog> <id>blah&l
I have the following string: A:B:1111;domain:80;a;b The A is optional so B:1111;domain:80;a;b is also valid input. The :80 is optional as well so B:1111;domain;a;b or :1111;domain;a;b are also valid input What I want is to end up with a String[] that has: s[0] = "A"; s[1] = "B"; s[2] = "1111"; s[3] = "domain:80" s[4] = "a" s[5] = "b" I did this as follows: List<String>
我有以下字符串： A:B:1111;domain:80;a;b A是可选的，因此B:1111;domain:80;a;b也是有效的输入。 :80也是可选的，因此B:1111;domain;a;b或:1111;domain;a;b也是有效的输入 我想要的是以一个String[]结尾： s[0] = "A"; s[1] = "B"; s[2] = "1111"; s[3] = "domain:80" s[4] = "a" s[5] = "b" 我做了如下： List<String> tokens = new ArrayList<String>(); String[] values = s.split(";");
My goal is a framework where concrete types of beans can be easily changed by a properties file. I also prefer annotations to XML. Ideally I'd to use a combination of @Resource and SpEL like this: @Resource(type="#{myProperties['enabled.subtype']}") SomeInterface foo; where I've loaded myProperties with a PropertiesFactoryBean or <util:properties> from a file that includes: ena
我的目标是一个框架，可以通过属性文件轻松更改具体类型的bean。 我也喜欢对XML进行注释。 理想情况下，我会像这样使用@Resource和SpEL的组合： @Resource(type="#{myProperties['enabled.subtype']}") SomeInterface foo; 我从一个文件中加载了myProperties和一个PropertiesFactoryBean或<util:properties> ，其中包括： enabled.type = com.mycompany.SomeClassA; // which implements SomeInterface 这不起作用，