Java 归档 - Page 339 of 655

Java – create only one object for the class and reuse the same object

I want to create only one object of a class and reuse the same object over and over again How can I do this? Solution ……

Java

2020-01-30

Java – change fonts of different lines in jtextarea

I want to add different font lines in jtextarea, but the last font seems to overwrite another font Please help import ……

Java

2020-01-30

Java – Jenkins build fails with svnexception

I'm trying to run Jenkins build Here is my configuration Jenkins version: 1.445 deployment: as war Java: 1.7 (server 6……

Java

2020-01-30

Java – the key in treemap returns null

So I have a very strange mistake When I first used keyset () to iterate over the first 10 keys of a large treemap, I s……

Java

2020-01-30

Java – if there is no code: is it just an intellectual challenge or is it useful?

A friend of mine is discussing these design techniques for object state transformation (he is a Java master, by the wa……

Java

2020-01-30

Java – string substitution in substring

I want to write a method for a Java class This method accepts the XML data string given below as input <?xml versio……

Java

2020-01-29

Java – observer mode with threads

I want to run several threads and join them at the end of my main method, so I can know when they are finished and pro……

Java

2020-01-29

Java – generates compiler warnings using user-defined annotations

Is it possible for the compiler to generate warnings when encountering user-defined comments? Something like the @ dep……

Java

2020-01-29

Java – how to handle exceptions of multiple routes

I'm mastering the spark framework, and I'm trying to understand the best way to handle exceptions in multiple paths At……

Java

2020-01-29

How to reduce the size of image file in Java

I want to reduce the image file size of uploaded images before saving to the server (to reduce loading time) How can I……

Java

2020-01-29

Failed to convert list to list in Java generics. Error

Here is my simplified diagram implementation import java.util.ArrayList; import java.util.List; public class TreeNode……

Java

2020-01-29

Calling order of overloaded methods in Java

I'm studying some Java exams. I've encountered this problem: //Write the output of this program: public static void m……

Java

2020-01-29

Automatic startup of java desktop applications?

I created a desktop application in Java using NetBeans 6.1 and created a jar file of the application Now I want it to ……

Java

2020-01-29

With automatically generated classes Net ORM solution: subsonic, Castle AR?

I used to use custom data mapping libraries, and I'm trying to switch to a broader ORM solution After some experiments……

Java

2020-01-29

Java – why can’t @ safevarags be applied to instance methods in the final class?

According to the document of safevarargs, the @ safevarargs annotation can only be applied to static or final construc……

Java

2020-01-29

Unit test – parameterized JUnit test without changing the runner

Is there a clean way to run parameterized JUnit 4 tests without changing the runner, that is, without using I have uni……

Java

2020-01-29

Java – mapping multi-level inheritance in Hibernate

At present, I have such a structure: A | +--B | +--C It uses join tables to map one table per subclass For historical ……

Java

2020-01-29

Java – jcombobox on JPopupMenu

I'm trying to use composite swing components as part of the menu Everything works well except for one detail: the comp……

Java

2020-01-29

Java – web client for Web Services

When I access it from a J2SE (desktop) application, I have a working web service To access this service, I will follow……

Java

2020-01-29

Multithreading – the parbuffer evaluation does not give the expected acceleration

I have a Haskell function, and I want to evaluate it with accurate intermediate results: f 0 x = 0 f n x = let tmp = f……

Java

2020-01-29

java. Lang.noclassdeffounderror: in anonymous inner class

I use sun / Oracle JVM 1.6 on Linux red hat_ 23 run this code on a VMware server Sometimes the JVM seems unable to acc……

Java

2020-01-29

How to reduce the size of image file in Java

I want to reduce the image file size of uploaded images before saving to the server (to reduce loading time) How can I……

Java

2020-01-29

Lightweight and low latency Java network library?

I'm studying a client server pair in which a multi-threaded client performs thousands of server calls per second. The ……

Java

2020-01-29

Why is the Java division of integers faster than the joy of hackers

I'm testing the throughput of divs10 function from hacker joy book, in my JDK 1.7 64bit version 21 and i7 Intel @ R_ 6……

Java

2020-01-29

Java – how to specify multiple fields as the primary key of an entity (using JPA)

See English answers > JPA composite primary key 2 Suppose we have a personnel table of SSN, nationality and name An……

Java

2020-01-29

Java – set the file name of the PDF that flows back to the browser

I have a Java webapp to create a PDF and stream it back to the browser byte[] pdf = report.exportPdfToArray(user); res……

Java

2020-01-29

Using Gmail as an SMTP server in Java Web applications is slow

I wonder if anyone can explain to me why every time my java web application uses Gmail's SMTP server to send e-mail, i……

Java

2020-01-29

Java Swing: focus issues

I'm making a level editor for my game I have a property panel where I can modify the properties of the selected object……

Java

2020-01-29

Numpy – is there an equivalent of SciPy for 2D arrays signal. Deconvolve stuff?

I want to deconvolute 2D images with point spread function (PSF) I've seen a SciPy signal. The deconvolve function app……

Java

2020-01-29

Calling ExecutorService. in Java shutDown()

I began to learn the executorservice class Documentation (and online tutorials) says executorservice is always called ……

Java

2020-01-29

Generics – rule variations in bounded wildcards in java-8?

I am in the tutorial of defining this static method according to generics in Java: public static <T extends Compara……

Java

2020-01-29

Java – what buffering strategy should I use for 2D scrolling maps?

So I'm creating a top - down 2D game in Java I follow the instructions of Java 2D: hardware acceleration – Part 2 – bu……

Java

2020-01-29

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Java – create only one object for the class and reuse the same object

Java – change fonts of different lines in jtextarea

Java – Jenkins build fails with svnexception

Java – the key in treemap returns null

Java – if there is no code: is it just an intellectual challenge or is it useful?

Java – string substitution in substring

Java – observer mode with threads

Java – generates compiler warnings using user-defined annotations

Java – how to handle exceptions of multiple routes

How to reduce the size of image file in Java

Failed to convert list to list in Java generics. Error

Calling order of overloaded methods in Java

Automatic startup of java desktop applications?

With automatically generated classes Net ORM solution: subsonic, Castle AR?

Java – why can’t @ safevarags be applied to instance methods in the final class?

Unit test – parameterized JUnit test without changing the runner

Java – mapping multi-level inheritance in Hibernate

Java – jcombobox on JPopupMenu

Java – web client for Web Services

Multithreading – the parbuffer evaluation does not give the expected acceleration

java. Lang.noclassdeffounderror: in anonymous inner class

How to reduce the size of image file in Java

Lightweight and low latency Java network library?

Why is the Java division of integers faster than the joy of hackers

Java – how to specify multiple fields as the primary key of an entity (using JPA)

Java – set the file name of the PDF that flows back to the browser

Using Gmail as an SMTP server in Java Web applications is slow

Java Swing: focus issues

Numpy – is there an equivalent of SciPy for 2D arrays signal. Deconvolve stuff?

Calling ExecutorService. in Java shutDown()

Generics – rule variations in bounded wildcards in java-8?

Java – what buffering strategy should I use for 2D scrolling maps?

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