Recent questions tagged java

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java - How to convert any Object to String?

Here is my code: for (String toEmail : toEmailList) { Log.i("GMail","toEmail: "+toEmail); emailMessage. ... give me some suggestion about this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - when is a spring bean instantiated

ApplicationContext ctx = new ClassPathXmlApplicationContext( "com/springinaction/springidol/spring-idol.xml"); Performer ... is called? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring MVC validator annotation + custom validation

I'm working on spring mvc application, where I should aplly validation based on Spring MVC validator. I first step ... together? And if yes how? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - @EnableTransactionManagement annotation with 2 transaction managers

I am using @Configuration annotation for configuration of spring instead of xml file. I am configuring 2 ... annotated configuration class? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring-MVC Problem using @Controller on controller implementing an interface

I'm using spring 2.5 and annotations to configure my spring-mvc web context. Unfortunately, I am unable to get ... do anything else. Any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to parse a cookie string

I would like to take a Cookie string (as it might be returned in a Set-Cookie header) and be able to ... in previous versions. Any ideas? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to persist LARGE BLOBs (>100MB) in Oracle using Hibernate

I'm struggling to find a way to insert LARGE images (>100MB, mostly TIFF format) in my Oracle database, using ... Oracle, 512MB Heap Size, 485MB file Testing PostgreSQL, 512MB Hea...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Hibernate persist entity without fetching association object. just by id

I have an simple association between 2 entities: public class Car { ... @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name ... ... .save(car); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Handling Multiple Query Parameters in Jersey

In the web service I'm working on, I need to implement a URI with query parameters which look like /stats ... values of the same parameter. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - @OneToMany without inverse relationship and without a join table?

This is a similar problem to "Hibernate @OneToMany without a separate join table", in that I need a @OneToMany ... there a workaround for this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - what's the difference between -source and -target compatibility?

When using the Java compiler (javac), we can specify two kinds of compatibility. One is using -source ... and target compatibility level? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Updating Android Tab Icons

I have an activity that has a TabHost containing a set of TabSpecs each with a listview containing the items to ... -creating all of the tabs? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What is chain.doFilter doing in Filter.doFilter method?

In a Filter.doFilter method I made this call chain.doFilter. What is doFilter doing inside a doFilter? Isn't it a recursive call? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - @GuardedBy , @ThreadSafe ,@NotThreadSafe

I see that the above annotations are used extensively in the book JCIP . I think it is really useful because ... of the Java language itself ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android : How to set MediaPlayer volume programmatically?

How to set the mediaplayer volume programmatically. I use it for alarm notification. Any help is highly appreciated and thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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324 views

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java - org.w3c.dom.DOMException: WRONG_DOCUMENT_ERR: A node is used in a different document than the one that created it

I'm getting an error when I try to generate an element that should look like <hold/> Using the java client code ... .java:696) ... 14 more See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Default value on JSP custom-tag attribute

When defining an attribute for a custom JSP tag, is it possible to specify a default value? The attribute directive ... Is there a better way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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560 views

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java - Long vs BigInteger

I understand that both java.lang.Long and java.math.BigIntegercan hold very large natural numbers. I also know ... value too large for Long? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - new line appending on my encrypted string

In Main: public static void main(String[] args) throws NoSuchAlgorithmException { System.out.println("encrypt:" + ... me what is the reason? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Min Average Two Slice Codility

A non-empty zero-indexed array A consisting of N integers is given. A pair of integers (P, Q), ... codility.com/demo/results/demo65RNV5-T36/ See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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288 views

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java - How to use String as Velocity Template?

What is the best way to create Velocity Template from a String? I'm aware of Velocity.evaluate method where ... an instance of Template). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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327 views

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java - Eclipse showing "Maven Configuration Problem: Unknown"

I just imported a spingboot project that I created in https://start.spring.io/ in eclipse. I tried to import two ... plugin> </plugins> </build> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Illegal Forward Reference and Enums

I'm programming a game in java which is made up of a grid of tiles. I wan't to be able to inuitively ... using enums which is just as simple? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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809 views

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java - javax.persistence.NoResultException: No entity found for query

Before I posted this question, I already looked this, but I couldn't get what I was looking for. I know that ... there will be a better way. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - A Queue that ensure uniqueness of the elements?

I'm looking for a implementation of java.util.Queue or something in the Google collection who behave like a Queue, ... maybe it's a bad idea? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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223 views

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java - Check whether a string is parsable into Long without try-catch?

Long.parseLong("string") throws an error if string is not parsable into long. Is there a way to validate the ... than using try-catch? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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245 views

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java - Does entrySet() in a LinkedHashMap also guarantee order?

I am using a linkedHashMap to guarantee order when someone tries to access it. However, when it comes time to ... its keys and calling get? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - No static method metafactory

I have an issue with my app that when I log in, the app crashes and I get the error: java.lang. ... the method to fix the error? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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