包含标签：Java 的文章
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Java – how and where should I add an actionlistener to my code?
I wrote the following code with a text field and a button After entering characters and pressing the button, a label i…… -
When executing asynchronous trigger, forget the await statement and forget to use ADO Net to write to the database. Is it safe in c#?
In ASP Net application, I want to log in to the database as efficiently as possible I use basic ADO Net writes to the …… -
Java – periodformatter – how to preset 0 if the hour or minute is exactly one digit?
When I use periodformatter PeriodFormatter formatter = new PeriodFormatterBuilder().appendHours() .app…… -
Java – HashSet contains not applicable to integer
I don't understand why inclusion doesn't work (in fact, if I have passed the custom class, I can revisit my hascode an…… -
How do I determine whether Java generics implement specific interfaces?
How do I determine whether Java generics implement specific interfaces? I tried several different methods, but they al…… -
Java int equation inconsistent?
This drives me crazy because it completely violates my efforts to remove it: int k = keyCode; //keyCode being a variab…… -
Read the value from the format string Java, groovy
I want to know how to read a single attribute from a formatted string in groovy or even Java I have a string containin…… -
Java – put expensive resource creation in static blocks?
I am using JAXB version 2.0 To do this, I create a jaxbcontext object as follows: package com; import javax.xml.bind.…… -
Java – how to cascade and keep only new entities
I am not sure how to set JPA persistence correctly for the following entities (using eclipse link and transaction type…… -
Java – Android – SQLite – select between date1 and date2
Mac OS-X Android Eclipse and ADT SQLite I'm new to creating Android apps. I've done a lot of research on it, but I hav…… -
Java – the best way to convert a numeric array to a CSV string?
If I have a string [] (assuming no comma), I can simply generate a CSV line For example, String[] header = {"header0",…… -
Java – downcasting / upcasting errors at compile time and runtime?
Please check the following procedure I wonder when the compiler will emit a conversion exception at the compiler level…… -
Java – introducing counters into loops in Scala
I'm writing a small program that converts a very large file into multiple smaller files, each of which will contain 10…… -
Java simpledateformat parses timezones, such as America / Los_ Angeles
I want to parse the following string in Java and convert it to a date: DTSTART;TZID=America/Los_Angeles:201@R_403_2407…… -
Java – strange tochararray () behavior
I'm trying to use tochararray () and found some strange behavior Suppose private static final char [] hex_ CHARS =“012…… -
Java – why is an object sometimes null when it is initialized in a thread and accessed from main?
When I create a new object in a thread, it is a property of an object. I give the thread that it remains null in the m…… -
Java – only remove system. Java from the for loops block Out statement
Any method can only easily delete them from the for loop blocks in the file Before: for( ... ) { ... System.out.printl…… -
Java Swing: JTable contains many models and custom renderers
I have a JTable. I recolor the rows according to the values of the model, as shown below: resultTable = new javax.swin…… -
Java – twitter4j access token is already available
I received an error message when using twitter4j: java.lang.IllegalStateException: Access token already available. twi…… -
Java – pass by value and polymorphism
See English answers > why Java polymers not work in my example public class Animals { int location = 200; //lin…… -
Java invariance, using the “=” operator
The questions about string invariance in java have plenty, in which the author of the problem actually reassigns refer…… -
Any Java way to generate recognition strings similar to Youtube Video strings?
Each video on YouTube has a unique identification string, such as 1cru2fzulec Is there any Java method that can genera…… -
How to accurately calculate the age of Java on the date of birth
I tried to calculate the age of several months considered in Java, so I can't subtract a few years I also want to tell…… -
Java – switch the action bar tab programmatically – how to attach parameters?
I am switching my Android (Sherlock) action bar tab, as described in this question: programmatically switch tabs in An…… -
GUI Java program requiring action event button
I am making a simple java program representing the Microsoft Word menu bar. I add an exit button in the file menu... I…… -
Java – when executing HTML Change the HTML link style in textviews after fromhtml
I'm developing an Android application I retrieve some data that looks like this: <a href="http://google.com/" title…… -
Java – why a loop with a char because its index is infinite?
This cycle will continue indefinitely: char a = 100; for(a=100; a>=0;--a) System.out.println(a); Does this happ…… -
Java – how to use math Random() gets the random number in the range
See English answer > math random,only generating a 0? 5 public class Tester{ public static void main(String arg…… -
What is the difference between controller and handler in Java – spring MVC?
Spring MVC documentation sometimes says "handler" or "request handler" For example, http://docs.spring.io/autorepo/doc…… -
java – Integer. parseInt(“9999999990”);
See English answers > unexpected numberformatexception while parsing a hex string to an int value 5 String str="999…… -
Comparison of strings in different ways in Java
I have two strings, I think I mean according to my eyes, they are exactly the same But their comparison gave me the wr…… -
Why does Java allow private string [] [] var []
private String[][] var[] private String[][] var[] This code is compiled But shouldn't they create arrays on types or v……