Recent questions tagged java

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java - Understanding Spring Transaction boundaries

I am trying to clear my doubts w.r.t. Spring Transaction boundaries with following example. @Transactional(propagation ... . 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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java - Google App Engine Eclipse Plugin Sign in: I got a white screen

I tried to sign in in Eclipse using the Gooel App Engine plugin but after i enter my login info i got a white ... 's button to complete sign in. 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 policy error applet alert

[aspectj:compile {execution: default}] Current policy properties: mmc.sess_pe_act.block_unsigned: false window.num_max: 5 ... to auto allow all 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 - Using Sigar API to get JVM CPU usage

I'm using Sigar to get the CPU usage of the current running JVM in an application server and store it for ... decreasing load on the server... 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 - sum of columns in a 2 dimensional array

static double [][] initialArray = {{7.432, 8.541, 23.398, 3.981}, {721.859, 6.9211, 29.7505, ... 3 at NewExam.arrayq.columnSum(arrayq.java:11) 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 - illustrating volatile : is this code thread-safe?

I'm trying to illustrate the use and importance of volatile with an example that would really not give a good result if ... vt.getCount()); } } 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 it that stops processings libraries from being used to processing.js

For those that don't know, processing is a language/ Java library primarily used for displaying data nice and ... libraries have been 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 - Building other, dependent projects with Ant

Let me preface by saying that I am new to Ant. As in, I just started learning it 2 days ago in order ... in order to build those projects first? 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 - Split string into several two character strings

I have this string 8S8Q4D1SKCQC2C4S6H4C6DJS2S1C6C How can I split this string into substrings that consist of 2 characters ... to split them. 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 - Finding all combinations of longs with certain bits set

This is such an obscure problem that I suspect I'll have to do it at a different level in my code.. ... quicker than most other alternatives.) 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 - AOP or APT for overriding methods from super classes

I have a large library of wicket components that are annotated with a custom annotation @ReferencedResource or another ... parts of it). 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 - Why can't implementing classes define an overriding method as static?

I'm confused why the following is not allowed: public interface MyInterface { MyInterface getInstance(String name); } ... in this 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 - How to decrypting the php encrypted string using android?

Hi I want to decrypting my php encrypted string. My code is UsingPHP.java import java.io.UnsupportedEncodingException; ... me? 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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java - Load .DLL with applet and use it on client

Can I load .dll from server to client within applet, and then call methods of loaded .dll (using JNI) on client side? 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 - Getting element using attribute

I am parsing Xml using Java, i want to parse element with the help of attribute value. For example <tag1 att=" ... java and xml. pls guide me. 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 - JPA secondary table as read only view - hibernate still tries to insert rows

I've got the following entity: @Entity @Table(name = "ONE") @SecondaryTable(name = "VIEW_TWO", pkJoinColumns = ... into secondary table (view)? 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 the use of inheriting object class methods in functional interface eg- toString, equals

I found following code, What is use of inherited equals() and toString() method. @FunctionalInterface public interface ... String toString(); } 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 - Most appropriate place for bounds checking - constructor or setter?

Still relatively new to Java and I'm wondering which is the better way to handle this. I have a class ... of which I am completely unaware? 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 - Eclipse: Accessing a editor template from plugin code

Let's say I have a editor template (which inserts some arbitrary snippet of code) defined in my editor ... editor template via Java code? 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 Change Activity To Fragment

I want To change my Activity to Fragment I tried hard but I am unable to Change my Activity To Fragment. Can ... Welcome.this, image); } } 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 set an env variable in Glassfish 2.1

I want to deploy an application, that is currently deployed in Tomcat, in Glassfish version 2.1. In the Tomcat ... anything like that in 2.1. 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 - Take screensot and save android

I'm a very new android developer with a basic understanding of java. I've undertaken a large project and I' ... > This is my xml code 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 - org.hibernate.exception.GenericJDBCException: could not execute query

I am using hibernate 3.6.7 to do mapping. I set the connection part as static. I need the service program ... suggestion? Thank you very much:) 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 create a ConstraintValidator for List

I have a simple validator to validate that a String value is part of a predefined list: public class ... How should I do that? 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 - Jetty throws "Missing content for multipart request" on multipart form request

I'm running Jetty 9 (jetty-9.0.5.v20130815) server with servlet-api 3.0.1 (javax.servlet:javax.servlet- ... -46F1-B182-44257808F0B9-- 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 - Spring Security : Testing & understanding REST authentication

I am working on Spring-MVC in which I am using Spring-Security for login/logout and session management. It works ... me know. Thanks a lot. 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 - HTML Formatted Cell value from Excel using Apache POI

I am using apache POI to read an excel document. To say the least, it is able to serve my purpose as of now. But ... Angel</b> and <i>Demon</i> See Question&Answers more detail:os...

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

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196 views

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java - retrieve JsonObject in POST with jersey

I have some problems in my application, I send a POST request, but I cannot retrieve the JsonObject in my server, ... work.. what am I missing? See Question&Answers more detail:os...

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

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