Java
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java – org. springframework. jdbc. Incorrectresultsetcolumncountexception: incorrect number of columns: expected 1, actual 38
I'm using jdbctemplate to retrieve beans from DB This is my way public List<trackerv3Livedata> getTrackerData()…… -
Java – used to check Lombok builders that are not null but not empty
I have a variable class and I don't want it to be null or empty Is there any way to use the Lombok builder to set prop…… -
Throw arithmeticexception in Java
In Java, (number / 0) throws an arithmeticexception, while (number / 0.0) = infinity Solution Because IEEE - 754 float…… -
Java – scan tree structure from bottom to top?
If the following tree structure or similar structure is given: I want to return the string zyxwvut I know how to do th…… -
Java heap dump error – Metadata does not appear to be polymorphic
When I try to get a heap dump from a running java process, I get this stacktrace What is the cause and what must I do …… -
Debugging – using GlassFish 3.0 1 and NetBeans 6.9 JPA 2.0 for 1 (recording and tracking)
I'm in GlassFish v3 0.1 and NetBeans 6.9 JPA 2.0 (eclipse link provider) is used in 1, and queries and other logging i…… -
Java – using Jersey’s dependency injection
If I use Jersey 1.12, and I have multiple resource classes, and they all need to access some shared context, what is t…… -
How do I group vectors into vector lists?
I have some data that looks like this (such as false data): dressId color 6 yellow 9 …… -
Java – libgdx: set another screen, but still the button activated from the old screen
In my libgdx game, I have 2 screens, menus and lists But when I click the same location (from the menu screen where th…… -
New to Java – what are JPA and Dao?
I'm new to Java and I'm trying to create a web project using a servlet I was taught to do this: >Create class com p…… -
Kotlin for deconstruction, quadruple, quintuple, etc
I am looking for a clean way to create destructible objects online kotlin. Pair and kotlin Triple covers many use case…… -
Java gridbaglayout anchor
Learn gridbaglayout. The problem here is the name and label com@R_950_2419 @It does not appear at the top of the panel…… -
How does immutability of Java strings increase security?
I am a novice in Java. When learning, I found that a string is immutable While I was reading the reasons behind it, th…… -
Java – “received fatal alert when deploying to sonatype: bad_record_mac”
Try deploying to the sonatype repository (sometimes!) When, I get this stack trace: javax.net.ssl.SSLException: Receiv…… -
Java – a protected member accessed in a derived class using a base class instance
I created an instance of the base class in a derived class and tried to access protected members I can directly access…… -
Java – position in the lower right corner of the screen
I need to put JFrame on the screen But I can't make them appear on the right side at the bottom of the screen Please h…… -
How do I compare a joda datetime object with an acceptable offset (tolerance)?
I wonder if there is any standard API in jodatime to compare 2 datetime objects with specified tolerance? Ideally, it …… -
Java – string conversion
I have a method that accepts string parameters In some cases, I want to pass the int value to this method For calling …… -
Validating a certificate in Java throws an exception – a valid certificate path for the requested target cannot be found
I have a web application that requires the client to send its certificate. The server must verify the certificate (tha…… -
Java – standard JPA 2 and 3 tables
I'm trying to create a condition to retrieve some objects from three tables (Association, update and detail) Details r…… -
Java – how to create a splash screen for the GUI?
Hello, I'm a novice in Java and try to make the flash screen or image display for 3 seconds Then it will enter my main…… -
What is the class loader in Java?
What does this mean when a customer says in Java that "code should not have a custom class loader"? What can't I do? S…… -
Java RSA encryption
I tried to encode a simple string "test" back and forth public static String encode(Key publicKey,String data) throws …… -
Java – no credit card processing for Google Checkout / Amazon / paypal
If I want to process payment directly instead of through Google / Amazon / paypal, what should I do? Is there a Java A…… -
Java – use IntelliJ to set breakpoints in gradle projects
Now that IntelliJ 12.1 is out, I want to be able to attach the debugger to the 'gradle run' application and stop it at…… -
Java – Google drive SDK activity exception not found
I'm trying to implement Stephen Wylie's Google drive example (here) This is my code: package com.googledrive.googledri…… -
Java simpledateformat time zone offset, minutes separated by colons
In Java, how to use simpledateformat to get "2012-11-25t23:50:56.193 01:00"? If I use Z format "Yyyy mm dd't'hh: mm: S…… -
Here is the java servlet interface
I'm new to Java I'm creating a servlet and getting the wrong interface here Can you make me understand this problem? I…… -
Java – exec Maven plugin means that the specified program cannot be run, even if it is on path
Editor: 20140716 Solution found tl; Dr = exec Maven plugin is not recognized CMD file, and only The bat file is recogn…… -
How do I check the Windows version in Java?
I want to check the Windows version in Java (basic or home or professional or business or other) What should I do? Sol…… -
Java – use Guice injection and actor to throw null pointers
I get a null pointer exception on the field injection of the server, which starts as an akka actor Plan part: private …… -
Java – Amazon S3, how to check whether the upload is successful?
I wrote a short test code in Java to upload the PDF file generated in memory In this test code, I only use a virtual b……