Recent questions tagged Java

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java - How do you override the null serializer in Jackson 2.0?

I'm using Jackson for JSON serialization, and I would like to override the null serializer -- specifically, so ... serializer in Jackson 2.0? 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 targetUrlParameter does not redirect

I'm trying to redirect the user back to the page where they clicked the login link. (Pages are read-only for ... m using Spring Security 3.1.4 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 - hadoop - map reduce task and static variable

I just started working on some hadoop/hbase MapReduce job (using cloudera) and I have the following question : ... -mononode cluster. Thank you 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 can I associate an Enum with its opposite value, as in cardinal directions (North - South, East - West, etc)?

I'm still working on my Cell class for my maze game I'm attempting to make. After help in a different thread ... it return to me it's opposite? 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 - Launch Skype from Android App programmatically

I create a call directly using the default os dialer by: Intent call = new Intent(Intent.ACTION_CALL); call. ... ); Passing the number fails. 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 - external allocation too large for this process

I posted a question last night about this issue, but I dont think I explained it well enough to get ... .system.NativeStart.main(Native Method) 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 - Multiple File upload using single servlet request

I want to offer to upload multiple files clicking upload button only once. Can I use multipart to send files? If ... send one file at a time. 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 can I speed up maven builds of JavaFX application?

My problem can be reproduced by creating a new project in Netbeans 8: New Project >> Maven >> JavaFX ... > </dependencies> Thanks! Daniel 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 - ' '-Invalid character constant?

I need to do this: while (result2.charAt(j) != ''){ } I get an error saying: Invalid character constant. Why? And how can I get over 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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376 views

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java - Android device is not showing the background image

I have created a project, targeting android 4.4 - API Level 19, as suggested by eclipse. Anyways, on the emulator ... to spot it as a beginner. See Question&Answers more detail:os...

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

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883 views

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java - Using SiteMesh with RequestDispatcher's forward()

I'm attempting to integrate SiteMesh into a legacy application using Tomcat 5 as my a container. I have a main.jsp ... it to work in this case. 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 - ProcessRequest Method

When do ProcessRequest method called? I am having a hard time why ,what and how the process request is ... called by the servlet container. 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 - "Cannot find symbol" error - even on a ridiculously simple example

So I've been trying to solve this problem for a matter of hours now. I've scoured the internet, I've scoured ... please help a brother out? :( 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 - Consuming One-Shot ResponseBody from Okhttp causes issues with Retrofit

I am using an Retrofit with an Okhttp interceptor in order to detect if my oauth token has expired. If the ... it with the response? 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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356 views

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java - Replace alphabet in a string using replace?

I'm wondering if I can use string.replace() to replace all alphabets in a string? String sentence = "hello ... welcomed too, unless too 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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789 views

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java - How to add an SVG to a PDF using iText7

I need to add an SVG graphic into PDF file. Is it that possible using iText7? Using iText5: BufferedReader in ... How can I create Graphics2D? See Question&Answers more detail:os...

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

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706 views

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java - Regex pattern accepting comma or semicolon separated values

I need a regex pattern that accepts only comma separated values for an input field. For example: abc,xyz,pqr. It ... a regex pattern 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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251 views

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java - Change selected dot color of JRadioButtonMenuItem

I'm working on my personal Java chat client whose one feature is setting user's status (Available, Invisible, Busy). ... it to my custom icon :) See Question&Answers more detail:os...

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

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472 views

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java - Spring DevTools not included in the fat jar packaged with spring-boot-maven-plugin

I am trying to create a fat jar using spring-boot plugin. But it keeps giving me NoClassDefFound exception. I have ... and it doesn't work. See Question&Answers more detail:os...

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

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298 views

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java - Change Panel size on button click

I have the following code: package in.res.num.tapb.ui; import java.awt.BorderLayout; import java.awt.CardLayout; import ... ().get(index)); } See Question&Answers more detail:os...

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

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673 views

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java - LWJGL: failed to load a library

Have been trying to work with 'lwjgl' on linux and am running into an issue when I run my compiled code ... be very much appreciated. 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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312 views

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java - Gradle build - add module path

My question: How do I set a module path for gradle build? I've become comfortable working with Java modules ... that Gradle does support 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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333 views

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java - Dynamically generate JFreeChart in servlet

I'm trying to generate graphs dynamically using JFreeChart as a result of some checkboxes the user selects, but I can' ... the HTML in the JSP. See Question&Answers more detail:os...

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

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968 views

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java - How to convert nested avro GenericRecord to Row

I have a code to convert my avro record to Row using function avroToRowConverter() directKafkaStream.foreachRDD(rdd - ... complex schema to ROW? See Question&Answers more detail:os...

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

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259 views

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java - How do I read a properties file and connect a MySQL database?

I need to connect my MySQL database from within Java program, for that I have to use JDBC. I need to ... them into your database via JDBC See Question&Answers more detail:os...

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

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345 views

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java - How to set system property values in NetBeans?

I 'm following a tutorial about JAAS Authentication here and when it shows how to run the example code, ... property when running with NetBeans? See Question&Answers more detail:os...

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

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371 views

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java - How to remove invalid characters from a string?

I have no idea how to remove invalid characters from a string in Java. I'm trying to remove all the characters ... How can I do this? 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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318 views

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java - Dynamic compilation of multiple Scala classes at runtime

I know I can compile individual "snippets" in Scala using the Toolbox like this: import scala.reflect.runtime.universe ... : not found: type A See Question&Answers more detail:os...

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

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