包含标签：Java 的文章
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Java – how to use flush() in printwriter
I have some code like this: PrintWriter pw = new PrintWriter(new BufferedReader(....)); for(int i=0; i<10; i++) { …… -
Java – change the state of the toggle button from another button
I am using swing with eclipse and window builder pro to create a Java GUI I'm using jbuttons and jtogglebuttons I want…… -
Java – can date changes be detected on the JCalendar jdatechooser field?
I want to detect when to change the date in the jdate chooser field so that I can update another field Is that possibl…… -
How garbage collection is done in Java is related to Net?
I want to know the difference between the two, or they are the same Solution This problem is irresponsible First, ther…… -
What is the best way for Java programs to monitor system health?
I hope to monitor my main system health indicators from within our Java based system The main points of interest inclu…… -
Why is java enumeration constant initialization incomplete?
I stumbled upon a very strange mistake. I can't explain why Imagine the following enumeration: import java.awt.Color; …… -
Java – error deploying to Tomcat
I use apache-tomcat-7.0 thirty-seven Git： https://github.com/IRus/jMusic When deploying an application: [2013-03-15 1…… -
Force target printer in Java
Is there any way to force the target printer to use hashprintrequestattributeset in Java? I don't want users to be abl…… -
Java: accessing subclass variables using parent methods
I have the following conditions: public class A { private int x = 5; public void print() { Syste…… -
Java – converts a string to a date using a time zone
I have a string pattern yyyy MM DD HH: mm a I want to convert it to the following format yyyy-MM-dd HH：mm：ss Z What …… -
java. util. What is the runtime of equals() in arrays?
As the title shows, Java util. What is the runtime of equals() in arrays? For example, if you compare two ints [], doe…… -
Is there a way to disable short circuit evaluation in Java?
Say I have this Code: boolean ret = a() && b() && c() && d() && e(); E () is called on…… -
Selenium webdriver works but slow (Java)
I'm using selenium webdriver to capture screenshots of web pages It works well. However, the time from when I run in e…… -
How to quickly find main () in a java project and use eclipse?
In this case, I have a SRC folder of the project, which has many classes. How can I detect what classes start with the…… -
Java – counts objects with the same attribute value
I'm creating a poker ranking solution. I have to count cards of the same suit or the same ranking in a set of cards He…… -
What is the classpath in Java?
I wrote a program that works on my laptop, but I really hope it works on the server I own Using netbean, I have cleane…… -
How to upload and scan files with anti-virus software on Java?
I'm working on an application that needs file upload, and it also needs I've heard of the APIs application server prov…… -
Java – opencv’s performance in template matching
I'm trying to do template matching basically on Java I use a direct algorithm to find a match This is the code: minSAD…… -
How many array dimensions are supported in Java, such as [1] [1] [1]… [1]?
There is already an answer to this question: > maximum number of dimensions in a Java array3 Solution The array dim…… -
Java solutions for C-style compiler instructions
I have a Java array: String[] myArray = {"1","2"}; I want to assign different values according to the conditions known…… -
Java – Android 8 or later: check Google play service
The method keeps returning 0 According to the developer documentation, if the device obtains the latest version of Goo…… -
When do java generics use transformations at run time?
I'm reading a discussion about C templates and c# generics and how they differ from Java type erasure generics I read …… -
Java – disable digital grouping in jspinner
I need a widget to select TCP / UDP ports, so I wrote the following: public static JSpinner makePortSpinner() { fi…… -
How to randomly select a letter (A-Z) in Java?
If I want to randomly select a letter between a and Z, I assume I have to use the random class: Random rand = new Rand…… -
Java-8 – why can’t @ functionalinterface be applied to Sam abstract base classes
I just started learning camels. The first thing I saw was context.addRoutes(new RouteBuilder() { public void c…… -
Conditional if else statements in Java
See English answers > why does the internal operator unexpectedly cast integers? two public class Pre { public …… -
Java – extends activities in the navigation bar to other activities
I'm trying to create a navigation drawer activity, so I can expand the activity, use menus in all activities and follo…… -
Java – why this numberformatexception?
I have this stack trace (part) Servlet.service() for servlet action threw exception java.lang.NumberFormatException: F…… -
Why does Java use merge sort to sort arrays larger than element 7
According to Wikipedia: But why? Both merge sort and quick sort are o (n log n) Solution The difference of the algorit…… -
Is there a “best” or most popular database with stand-alone Java applications?
Is there a "best" or more popular database with stand-alone Java applications? Update: talk about small applications (…… -
Java – jasperreports is exported to xlsx instead of XLS
I can't find how to export jasperreports 4.1 1 Xlsx file JRXlsExporter There is no xlsx equivalent I can't find a para…… -
Java – Android – open or restart the application after clicking the push notification using the flag activity
I use push notifications in Android When I receive a push notification, if the application is still running, I want to……