包含标签：Java 的文章
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Null pointer exception of getter setter in Java
I have one named shareddata Getter setter class of Java When I want to hint at it on my code, I get a null pointer exc…… -
Java – spring MVC relative redirection from httpservletresponse
Given this relative redirection to another controller: @Controller @RequestMapping("/someController") public class MyC…… -
Can I get the properties defined in “gradle. Properties” in Java state?
I'm in gradle A property is defined in the properties file, as follows: user.password=mypassword Can I use it as a var…… -
java – file. Createnewfile() IOException “no such file or directory”
Although java coding has this problem: file Createnewfile() throws IOException "no such file or directory" Check out o…… -
Java – redraws JPanel only after window resizing is complete
I have a JPanel and I draw four rectangles on it Randomly select the color of each of these rectangles The color chang…… -
How does this multithreaded java code work?
In view of this, the Java code: class Account { private Integer number = 0; public synchronized void s…… -
Java – which method in jsoup can return modified HTML?
When I use jsoup to parse HTML files (stored locally) I modified some elements in the HTML file, so I want to save the…… -
Java – how to create an ordered set of objects based on specific fields?
I need to retrieve the sorted object list according to the sorting field; Their collection type is sortedset, but the …… -
Multithreading – thread:: join() prevents it from
To learn how to use atomics in C 11, I tried the following code snippet: #include <iostream> #include <thread…… -
Java – a class that describes immutable ordered sets
I need some class / interface names that describe immutable ordered sets (in input order, such as linkedhashset) Of co…… -
Java – how to draw a border around MapView
I try to draw margins around MapView when I click a button So that's what I've tried. It doesn't work MapView is locat…… -
Why should Java method names not contain underscores?
I am using PMD to check java coding violations public void testCaseMethod_4_2_16(){ //some implementation } Of whi…… -
Numericupdown equivalent in Java
It should be easy, but I didn't find it in Google: In Java Net system Windows. Forms. Does numericupdown have an equiv…… -
Java stream orElseThrow
I want to convert a piece of code from a connection pool project that I've been trying to use streams The original cod…… -
Why Java util. Date represents year as “year-1900”?
In Java util. In date: * In all methods of class <code>Date</code> that accept or return * year,month,dat…… -
Java – moving objects and timers
I have a 500 width and 400 height screen, and I have a vector with a bunch of shapes Suppose the vector has two differ…… -
Java: draw a circular spiral using drawarc
I'm doing a Java programming exercise. We must draw a circular spiral using the drawarc method so that the result look…… -
Java：JOptionPane Radio Buttons
I'm working on a simple program to help me calculate mixed liquid things I tried in joptionpane Radio buttons are adde…… -
Java documentation – @ return and @ param
I want to know how to use @ return and @ param to record code? I guess I'll do something similar @return(whatever the …… -
How do I use this keyword in static methods in Java?
Is there any way to use this keyword in static methods in Java? I want to display toast messages in static methods in …… -
Java – how to add the final integer variable?
Eclipse is providing final, but I can't add the I variable @Override public void onClick(View v) { final TextView …… -
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……