Java
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Java – what happens to the returned object when I call “new object()” without storing the return?
Suppose we have some code as follows (I know this is a bad practice): try { new myObject(); } catch { //stuff } Wh…… -
Java – JFrame has the same shape as image / program running in the background
My problem is very simple, the solution is definitely not I am looking for a way to shape a JFrame, just like the imag…… -
Java – spring security oauth2 client
I have set up an oauth2 server with spring security I want to write a client application to use this OAuth server with…… -
Implementing binarytree in Java
I have this code for binarytree creation and traversal class Node { Integer data; Node left; Node right; …… -
Output of expressions in Java (– I)
int i=9; int i=9; System.out.println(--i + ++i); But according to the association and priority rules in Java, I should…… -
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Java – is it possible to trigger JButton events through method calls – rather than JButton clicks?
Can events be triggered through method calls? (and click) import java.awt.event.*; import javax.swing.*; public class…… -
Using generic classes and generic methods in Java is difficult
Java novice, I did search some examples, but I'm really sad I have a node class that uses generics: public class Node&…… -
Dropwizard / Jersey returns the Java list as JSON without a root node
I'm using the dropwizard using plain knit fabric for Jason My problem is that when I return a list, it does not specif…… -
Correcting Java program code snippets
I'm a beginner. I learn Java and modify my exam by answering the questions in the past exam papers. There's another qu…… -
Java regex – how to replace patterns or how to replace patterns
I have a pile of HTML files In these files, I need to correct the SRC attribute of the IMG tag <img alt="" src="./S…… -
VHDL std_ logic_ Vector index and “downto”
I want to set STD separately_ logic_ Vector to easily annotate individual bits or groups of bits This is what I have: …… -
Java – serialize object properties
When I use serializable in a class, do I need to add serializable to all objects in the class? For example, public cla…… -
Java – spring 3.1: how to inject beans created in different configuration classes
I just set up a web application using spring 3.1, and I try to do this by using java configuration Next, the verifier …… -
It looks like an internal static class in Java, but obviously it’s not (I don’t understand, how is this possible?)
From: imageView.setLayoutParams(new GridView.LayoutParams(85,85)); View the new GridView Layoutparams section It seems…… -
Java – printwriter adds text to a file
In my online computer science class, I have to write a program to determine the surface gravity of each planet in the …… -
Refactor this java code to check whether the string contains any of these possibilities?
I need to check the possibility that a string does not contain any of these strings: MNC bra LEB Mar RVC method GLZ Wo…… -
Java – how to check whether the function execution exceeds the specified number of seconds?
If it takes more than 3 seconds, I want to time out a function long startTime = System.currentTimeMillis(); getStaticJ…… -
Java – add the Google API to an existing eclipse project
I'm writing an Android application that will use Google maps, but to do this, I need Google API When I downloaded the …… -
What instantiation is called in Java?
This may be a very basic problem for Java, but I don't remember it and don't know how to search it online button.setOn…… -
Java – loads objects from a file into ArrayList
I don't know. If I don't know how many objects there are, how should I read objects from the list? Saving is easier be…… -
How is inheritance in Java different from real-world inheritance?
I got this question in an interview Through the inheritance of the real world, the interviewer means that something li…… -
Java – XML error due to servlet file. The declaration of the element cannot be found, and the referenced file contains an error
I don't know why these mistakes happen. Someone can explain how I solve them – > cvc-elt. 1: Element 'Web' not foun…… -
Set vs alphabetical order in Java list
Arent lists ordered collections and is not ordered? So why does this program sort strings alphabetically instead of li…… -
Java – objects to list – > Why do I create a new object?
I want to know why: Data type library public class Bank { String Blz; String Name; public String getBlz() { …… -
Java – extract relative paths from absolute paths
This is a seemingly simple question, but I can't do it in a clean way I have a file path as follows: /This / is / abso…… -
Java containsall does not return true when a list is given
I want to check that one array is a subset of another The program prints incorrectly, but I hope it is true Why not in…… -
Java – how to set the main body of httpput on Android? (do not add Library)
I want to upload some data from the android app to pachube [update: for those who read this in 2013, "pachube" became …… -
Using JavaMail with self signed certificates
I have a servlet that contains the following code: System.setProperty("javax.net.ssl.keyStore",getServletContext().get…… -
Java – is there a simpler way to split / rebuild strings?
I'm currently using string Split (""), as follows: String[] tmp = props.get(i).getFullName().split("\\."); String name…… -
Read file – Java io. FileNotFoundException
public void loadFile(int level){ public void loadFile(int level){ try { //Create new file …… -
Java – treemap vs ArrayList – performance and resources when iterating / adding / editing values
Talk about performance and resources Which is faster and requires less resources when adding and editing values, Array……