Java
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Java – easily convert maps to maps
The API I am using has a method to return map < string, Object >, but I know that in this case, object is string…… -
Java regular expression matcher mismatch
My string: <a href="https://MYURL/browse/TEST-53">FOO.BAR</a></p> Code: Pattern pattern = Pattern.co…… -
Java – returns a static HTML without redirection in spring
So I want to return to the HTML page without sending a redirect The reason is that the URL in the browser is changed b…… -
Symfony – marks a single doctor migration as run / executed
Is there a way to mark a doctor migration as "running" or "executed" because it does not appear as a migration that ne…… -
What string should I pass to Java lang.Long. Parselong() to return Nan?
Unfortunately, I can't use anything like long Nan, because the string is actually the return value from different C mo…… -
Java – JBoss cannot handle more than 3000 requests
I created a client and server web service I thought about doing a performance test I tried a JMeter with a sample test…… -
Java – defines a string as null or empty
I'm from C # Net background, whenever I have a string, I declare it as string Empty String myStr = null; I don't like …… -
Java – enhanced ‘for’ loop causes ArrayIndexOutOfBoundsException
This is my code: import java.util.Scanner; public class Arrays { public static void main(String[] args) { …… -
Get data from the Internet with Java
I want to make the following application in Java for my university project I know the core Java I want to know what I …… -
Arithmetic operators in Java
I encountered a strange arithmetic operation. Here is the code: int i = 9 + + 8 - - 11 + + 13 - - 14 + + 15; Syst…… -
How is it different to declare a java interface method signature as final and non final
How is it different from declaring a method signature as final and non final in a java interface? int setName(String n…… -
Java – store axis raw XML request / response in the session (to be used in JSP)
If possible, how do I get the original XML request / response that Axis called / retrieved in my application? I am usi…… -
Java – check the currently open clip position when using drawerlayout
I'm using Android drawerlayout in the support library to display the slide menu I use a single activity and 5-6 clips …… -
Java – conditional rendering of HTML in spring MVC
Are there any tags that can conditionally render HTML blocks For example, struts has: <logic:present name="someForm…… -
Java – how to put components on top of other components?
I have a jscrollpanel, including a large panel, which itself includes three internal panels I want to put a panel (for…… -
java – null！= The difference between variable and variable= null
null！= Variable and variable= What's the difference between null? if ((null != value1) || (null != value2) || (null !…… -
Java multi “where” keyword?
How to limit 2 generic types in a class definition? How should I "where t:" twice? public class MyClass<T,S> whe…… -
Java OO design help – how to abstract a save method?
I have a preference class (module) for several different applications Basically, it is the cache of preferences, so th…… -
java – ArrayList . Contain gives strange output
Who can explain? I have an ArrayList with a string I'm using it! arraylist. Contain to make sure I don't add duplicate…… -
Java – Scala: ‘Val’ is not initialized
In Java, I can easily do the following: final String str; if (p() == true) { str = "foo"; } else { str = "bar"…… -
How to use pdfbox to digitally sign dynamically created PDF documents?
I'm sorry! I'm poor in Java Please correct me where I am wrong and improve where I am poor! I'm trying to use PDF@R_77…… -
Java – how to check that we use Oracle 8i database in JDBC?
In JDBC, how to check that we are using Oracle 8i database? Solution Connection connection = DriverManager.getConnecti…… -
Java – if I call a static method, does the constructor run
I have a class named tile with a static method public static buffered image grass(). The class also has a constructor …… -
Java – error: unable to find or load the main class < < why do I receive this error?
I don't seem to be able to make this code work properly This is the mistake I keep getting: What caused this? Payroll3…… -
You can overload the finalize () method in Java
I've read a method, and each method can be overloaded It's a method, of course But when searching, I also found that y…… -
Java – vector and arraydeque classes
What is the difference between the vector and arraydeque classes? I read about the arraydeque class yesterday, and I u…… -
Java – why consider numeric values using the int parameter method?
class Test { class Test { void m1(byte b) { System.out.print("byte"); } void m1(short s) { System.out.…… -
Java Swing application message dialog help
I'm working on Java Swing applications I need to create a dialog box as shown in the figure I don't know the name; I c…… -
Java vector warning
I'm not sure what's wrong with my code public Vector blob (Pixel px) { Vector v = new Vector(); Point p = new…… -
Java: basic math errors?
I have to do something fundamentally wrong here My code is very simple: private static final long MILLIS_PER_YEAR = 10…… -
Java – why are there unhandled exceptions in this code?
I am from the following code: class Animal{ public void eat() throws Exception {} } class Dog extends Animal{ …… -