包含标签：Java 的文章
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Java – JPA subclasses referenced by multiple different parent classes
I encountered the following ORM problems: I have two grades A and B, and they all have a group of grades C: class A { …… -
Java – add graphics to JFrame using borderlayout
I'm trying to do a simple job where I display a line of text to show whether the door object is open Below it, I visua…… -
Object size in Java
Suppose I have: Class A{ int a; } A obj = new A(); Then what is the size of obj? Is it the same size as int, just …… -
Java – add jpanels of other classes to CardLayout
I have three windows in three separate classes. I want to use CardLayout so that when you click the next button, the n…… -
Java – eclipse supports refactoring
Can eclipse do this refactoring? Suppose I have a class with a list: class DomainObject { private List list; p…… -
Play Framework 2.1(Java)eBean @Encrypted Annotation Errors
I'm trying to use the ebean @ encrypted annotation on the string field for the database model The document makes it lo…… -
Java – dagger: field injection in POJO
I've never tried guide or other Di libraries, but I've tried to use the dagger from square for Android application It …… -
Java – automatically opens the print dialog box when opening PDF using iText
I need to be able to automatically provide a print dialog when opening PDF I need JavaScript to do this. I wonder if i…… -
Java – pass a map or object from a JSP to a servlet
I have an application that passes the mapping from servlet to JSP In JSP, I display the map and provide the option to …… -
Java – how to use enum in the right way?
I like Java very much. I use enumeration for the first time, as shown below: public class Web { public String …… -
Writing XML documents from Java – simple
I know there are many problems in writing XML from Java on stack overflow, but it is too complex I think I have a very…… -
Database – when using JPA, avoid stale data from DB?
The problem I encountered is similar to that described in the invaliding JPA entitymanager session: Problem: getting s…… -
The Java class file was not created in the classes folder
I am compiling a java program with the following command: Ironically, the generated class file is created in the same …… -
Running Axis2 v.1. With JRE 5 / 6 6.2 what jars are needed to generate the client?
Which jars in the Axis2 distribution (version 1.6.2) are required to run the generated WebService client? There are se…… -
Java – eclipse RCP internationalization independent plug-in
No tutorial provides specific examples of how to create international plug - in fragments I need to translate to plugi…… -
Java – deletes items from the index when looping through the list
public boolean isTwoPair() { public boolean isTwoPair() { boolean isTwoPair = false; Collections.sort(deck); …… -
Java – calendar gettime() returns only est
Calendar cl = Calendar.getInstance(TimeZone.getTimeZone("America/Los_Angeles")); Calendar cl = Calendar.getInstance(…… -
Java – I get a dead code warning when I try to write an if condition
I received a dead code warning: Topic topic = findTopicByID(point.getIDTopic()); if (topic != null) { ... } else i…… -
Java – how do I traverse an array and check for duplicates?
I'm creating a program that allows you to store 10 items in an array What I can't let the program do is that if one of…… -
Java – writing output data to a text file produces incomplete results in the text file
I have 14 lists, each with numeric or string data The size of each list is 32561 I must output a file in the format: l…… -
Java – trying to prove that the complexity of binary search is O (log (n))
I tried to prove the complexity of binary search Wikipedia says the worst case scenario is log (n) This means: If I ha…… -
Java: how to output dual type numbers to integer format if the decimal number is 0
I have a dual type array {1.0,2.3,3.45,7.8,9.0,5.0} When outputting numbers, I want numbers with a decimal of 0 to be …… -
Java – is there any way to add mywebapp-1.0-snapshot-classes Jar from attachclasses configuration in Maven war plugin to mywebapp-1.0-snapshot jar？
According to Maven war plugin FAQ, <project> ... <artifactId>mywebapp</artifactId> <version…… -
Java – adjust / zoom JComponent to the page to be printed
I'm trying to scale my component so that it can be placed on a single printed page (portrait or landscape) gDiagram.ge…… -
JSF – primefaces cannot be added as a library for ear
I want to use primefaces in my Java EE 6 (JBoss as 7.1.1final) application, which has the following structure: EAR |- …… -
Java – Apache Cordova in NetBeans 7.4
I just downloaded NetBeans 7.4 and I'm trying to explore Apache Cordova This is the log ant -f /Users/jason/NetBeansPr…… -
Java – instead of rewriting, new files are created
I am trying to write to an existing file As I saw on the forum, this code should rewrite the old file, but not rewrite…… -
Java – how to use two fragments in Android drawerlayout
I tried using Android navigationdraw – http://developer.android.com/training/implementing-navigation/nav-drawer.html &…… -
How do I display images immediately in a java applet?
I created a simple memory game in Java applet There is a problem with the card At first appearance, the image requires…… -
Java – how to detect the actual value of – Xmx param? Runtime. getRuntime(). Maxmemory() is inaccurate
In my case, this value is usually different from the - Xmx. I specified For - xmx810m, it returns 821035008, or 783mb …… -
Java – is there any way to set a “/ / $non-nls” comment for all strings in one line?
Does anyone know if you can set a / / $non-nls annotation tag for all strings in a line in Java... It might be like th…… -
Java – double quotation marks in Python, such as triple double quotation marks in Python
In Python, I can use: test = """My "cute" string""" Where double quotes are escaped Is there a way to simulate this in……