Java
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Java – no body message is displayed when sending attachments
When I send an attachment, I can't see the body message in the email (message. Settext (this. Getemailbody());) MimeMe…… -
Java – Gmail also extracts messages from sent messages
I have the following code to connect to the inbox of the mail server: Store popStore = popSession.getStore("pop3"); po…… -
Save Java BitSet to DB
Using JPA, I want to be able to save BitSet to the database and pull it back to the program Suppose I have: @Entity @T…… -
Whether it is possible to have a common Java library module depends on the Android SDK in Android studio
In my multi - module Android studio project, I want to create a normal Java module But in this module, I also want to …… -
Java – do I need to use @ remote when I want to expose EJBs to different applications on the same application server?
I have a @ stateless @ local bean successfully deployed in my ear When I browse the JNDI tree, I can see the new EJB 3…… -
Java – lwjgl 3 get cursor position
How do I get the cursor position? I checked the glfw documentation, and there is a method glfwgetcursorpos (window, &a…… -
Java – format date in function
I tried to format the date in the function interface, but I don't know if it is possible SimpleDateFormat dt1 = new Si…… -
Change the color of the panel title in Java Swing
I am running swing application on win7 with 144 DPI flat panel monitor The titles of my frame, options pane, etc. are …… -
The Java – graphics2d conversion result does not match the manual conversion
I use Java's graphics2d to manipulate my drawing on a component using affinetransform Sometimes I need to manually ope…… -
Randomize text files read in Java
I try to read a text file in Java, which is basically a set of problems There are four choices and one answer The stru…… -
Java – use the abstract init() function in the constructor of the abstract class
I have something like this: public abstract class Menu { public Menu() { init(); } protected abs…… -
Converting images to 2 colors in Java
I want to use java to convert the image to 2 colors, black and white I am converting to grayscale using the following …… -
Java nosuchmethodexception when getting constructor
I tried to use reflection to load instances of classes When I tried this, I got an exception without this method I'll …… -
Java – does hibernate / JPA consider transiant modifiers (not annotations)
I want to avoid serialization (in JMS / AMF), but still use JPA / hibernate to hold fields Is the transient modifier m…… -
Java – how to animate a gyro?
It's Hanukkah, and I'm trying to animate the Dreidel: I can make it rotate on its own axis This is my code: import sta…… -
Java – won’t Android studio let me use switches on strings?
I'm creating an Android Application in Android studio and trying to create a switch case on the string As far as I kno…… -
Java – why do I throw a NullPointerException
So it's a winter vacation for college, and I'm trying to be sharp in coding, so I just write the code of programs and …… -
How to calculate a good hash code for a large list of strings?
What is the best way to calculate a hash code based on the value of these strings in a pass? OK, I mean, it needs to: …… -
Java – declare and throw and throw without is declared exceptions
What is the difference between dual methods in Java? public void methodA() throws AnException { //do something …… -
Check whether the elements in the array are subclasses in Java
Let's assume that I want to check whether the values in the object array belong to a superclass or subclass. For examp…… -
Java – get an instance of class [runtime type token]
I created a preferences class. For getters, I don't want to use runtime type token So this is my getter method: public…… -
java. math. BigInteger pow (exponential) problem
I did some tests on the pow (index) method Unfortunately, my math skills are not enough to solve the following problem…… -
Java – spring MVC does not record all exceptions
I have spring MVC settings to log exceptions using commons, but I find that some runtime exceptions are not logged Thi…… -
Java – how to compile only changed source files using ant
I'm trying to write an ant build for compiling the source folder, which is the target of my compiled script <target…… -
Java – Alphanumeric regular expression
I want a regular expression in Java, which must contain at least one letter and one number in any position The passwor…… -
Java – how do I initialize graphics G?
I want to display gameover images in Pacman games at the end of my life But I call paintgameoverscreen (graphics g), a…… -
Java – displays tooltips above cells in JTable
When the user enters an incorrect value in it, I need to display a tooltip above (or below:) the cell (see the figure …… -
Java 8 time zone conversion
In Java 8, I want to convert datetime from UTC to ACST (UTC 9:30) Input – > 2014-09-14t17:00:00 00:00 Output – >…… -
What happens when a collection in Java exceeds its capacity?
I have a service that schedules all calls in memory because we don't want to lose data. At the same time, we need this…… -
For Java applications based on play 2.0, can I use groovy templates instead of scala?
I'm the new play 2.0, and it's hard for me to understand the scala template used to create views Solution Yes, there i…… -
Java – parameter org.org not found gradle. api. Project method (Android)
I got a bug. When I tried to compile my project in the studio, I had searched a lot without a real solution Error: (17…… -
Java – explicit and implicit locks
Using locks (Java. Util. Concurrent. Locks. Lock) instead of the keyword synchronized, is the method wait() exactly th……