Recent questions tagged Java

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java - I want to convert a resultset to a string. I have tried everything but it always gives no data found. Please provide some solution

I want to convert a ResultSet to a string. I have tried everything but it always gives no data found. Please provide some solution 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 syncronisize two Listview positions

I have two ListViews. Is there any way to synchronize the position of ListViews when I scroll any one of the ... me any code example 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 - Catching ClassCastException in a generic method when doing generic cast

Suppose I have a method @SuppressWarnings("unchecked") public <T extends Number> T getNumber() { try { ... stopped wondering the above problem. 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 - Difference between SwingUtilities.invokeLater and SwingWorker<Void, Object>?

What is the difference between: //Some code, takes a bit of time to process (new SomeJFrame()).setVisible(true ... method is better to use? 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 effective "select all" checkbox in JSF

I want to implement select all checkbox into JSF h:datatable. This is the code if the h:datatable: < ... { /* * Oracle table structure CREATE TABLE ACTIVESESSIONSLOG(...

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

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java - How to work with alias in JPQL

I'm trying to get some values from a H2 db table. The query which does what I need is this: SELECT cast( ... the right H2 query. Thank you 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 - Use methods declared in implementation that are not defined in interface

I have a class defined by an interface public interface Test { void testMethod(); } Test test = ... from implementation to implementation. 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 - Inserting HashMap Values to a table using ibatis

I found this on http://old.nabble.com/insert-statement-td21157498.html I want to do the same thing .I have two ... !!! values ); </insert> 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 - Concurrent add on non threadsafe HashSet - what is the worst that could happen?

Situation: Multiple Threads are only adding values to a non threadsafe java.util.HashSet and no other operation is ... worst that could happen? 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 generate Thread dumps when JVM terminates automatically

Problem scenario : The problem is noticed in sonic MF container (The jvm).The container has hosted some java ... follow ? 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 - Components disappear after resizing JPanel

I am trying to create JPanel with draggable crosses which appear after mouse clicking. Everything works fine but when I resize ... ); } }); } } 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 - BcryptPasswordEncoder

I use Spring security in our Application and would like to validate user input with the password stored in the ... is wrong with comparison. 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 - Reboot programmatically Android Things

I want to use this code in order to reboot my RPI3 running Android Things: public static void Reboot() { try ... "/> Am I missing something? 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 - disableRegistry() doesn't exist (org.apache.tomcat.util.modeler.Registry)

I updated my project from Spring Boot 1.5.6.RELEASE to 2.2.5.RELEASE and now I get an error claiming that the ... .0.1javax.servlet-api-4.0.1.jar;C:UsersTMitk.m2 epositoryjavaxser...

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

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java - Custom SimpleAdapter only shows Sample Text Android

Before making my own SimpleAdapter object because I wanted to change the color of the rows, I was just using new ... were, until I did 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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690 views

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java - Setting timeout for IBM MQ

When I call com.ibm.mq.MQQueue#put(MQMessage,MQPutMessageOptions) it may hang. How can I set up ... .MQQueue#get(MQMessage,MQGetMessageOptions) 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 - Synchronize JTextFields Values by PropertyChangeListener

I want to copy the value of a jTextField - TXTFLD1 to another jTextField -TXTFLD2 when the value at ... alternatives solution for this problem? See Question&Answers more detail:os...

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

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338 views

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java - getContentLength() return -1 only in WiFi?

I want to know the length of the file, so I tried getContentLength(). It works fine with network ... poids = conexion.getContentLength(); 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 - Can't Get Guice Method Interception to Work

I'm trying to print a "Hello, AOP!" message whenever Guice/AOP Alliance intercepts a method marked with a ... for some people...weird. 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 - http get request with body

i know you shouldn't send a HTTP GET Request with a body, but ceilometer web api forces me to do so. I ... the response. Thank you 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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317 views

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java - Create PostgreSQL database on the fly using Hibernate even if the DB doesn't exist

Using H2, Environment.HBM2DDL_AUTO, "create" creates the database if it does not exist yet. However, in Postgres, ... ); return properties; } } 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 - Verifying correctness of FFT algorithm

Today I wrote an algorithm to compute the Fast Fourier Transform from a given array of points representing a discrete function. ... - t2; } } } See Question&Answers more detail:os...

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

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357 views

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java - Binding XML using POJO and JAXB annotations

I have the following xml format that i want to bind it through a POJO and using JAXB annotations. The XML format ... in order to bind all data? See Question&Answers more detail:os...

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

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360 views

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java - Realm - Share Database between Apps

So I have a application that is comprised of 3 APK/Apps. How do I share the database between apps? I ... passing in different contexts. 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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626 views

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java - JTable cell span merge

Hi I'm having a problem with Java JTable. I want to merge or span cells. I did it using this ... class. 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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293 views

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java - OutOfMemoryError : When receiving XML response of 2.3 MB

Following is simple method that connects to web service and receives the XML response from server which is about 2.3MB and ... ); } f.close(); See Question&Answers more detail:os...

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

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320 views

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java - Create key-value pairs string in JSON

I'm new to JSON. I'm trying to create a JSON string in Java (org.json.JSONObject(json.jar)) which ... collection and then get individual values. See Question&Answers more detail:os...

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

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304 views

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java - Running swing application in javaFX

I have a code that work perfectly on Swing but I want to integrate it on javaFX. I know that I must use ... .INFORMATION_MESSAGE); } } }); } See Question&Answers more detail:os...

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

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