包含标签：Java 的文章
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Java: generic filter mapping function
I'm trying to develop a general function to filter maps My code so far is: public static Map<?,?> filterAttrs(Ma…… -
Does the java compiler pre calculate the sum of text?
int i = 10 + 20; int i = 10 + 20; Is it true that the compiler will process this code, add 10 and 20 bytes, and the co…… -
Java – how do I set the resource ID for a token?
I try to use this guide to implement restful web services of oaof: https://spring.io/guides/tutorials/bookmarks I can …… -
Java – jtabbedpane: displays the task progress in the tab
I have a simple swing Java application that performs a search and the results are displayed in a new tab When the sear…… -
Java – the trouble of iterating HashMap using JSF, myfaces, and facelets
I had some trouble looping through HashMap to print its values to the screen Someone can check my code carefully to se…… -
Java – a document error that occurs when a node is appended to XML
public static Node createNodeFromXMLString(String xml) throws SAXException,IOException { public static Node createNode…… -
Java enumeration using enumeration in constructor
Can I have enumerations in Java take a set of enumerations as parameters? If so, how can I achieve it? When I use this…… -
Java – return statement in void method
I have the following method to return void. I need to use it in another method that also returns void @H_ 403_ 9@ @H_ …… -
String operation in Java
I asked the following two questions in an interview yesterday 1 GT; Given a string, calculates a new string in which a…… -
How to judge the efficiency of Java code
I just realized that from a computational point of view, I don't know how to judge whether a piece of Java code is val…… -
How does the Java link list loop using the for loop?
Hello, I'm trying to create a for loop that iterates through the linked list For each data, it will be listed separate…… -
How to use JTable’s row classifier to restore the original row order?
I have enabled sorting in JTable using the setautocreaterowsorter method Clicking the column header will switch betwee…… -
Java: bad operand types
I'm a beginner. I'm sorry if this question is stupid I wrote the following code: public class Traindata { String City;…… -
Java – how to use asserttrue?
I have: package com.darlik.test; import org.junit.Assert; public class Test { public static void main(String[] …… -
Java – how to sort hash map list
I have a HashMap list, as shown below ArrayList l = new ArrayList (); HashMap m = new HashMap (); m.add("site_code","A…… -
Java time implementation
package timeToys; package timeToys; import java.util.regex.Pattern; ** * A DayTime is an immutable object that sto…… -
Java – can you request multiple types at once?
Basically, I want to do this: public interface A { void a(); } public interface B { void b(); } public class S…… -
java – JMH puzzle：StringBuilder vs StringBand
It's hard for me to understand the progress of this benchmark I want to measure how my sample class stringband works c…… -
Java – if a runtimeException is thrown, can it be caught as an exception?
If I have a try block that throws a runtimexception subclass, can subsequent catch blocks catch it as an exception? es…… -
Java split string “^ ^” [copy]
See the English answer > java split on ^ (CARET?) not working,is this a special character? 6 ***^|^100^|^101^|^102^…… -
Java if() does not work
When I run some code (shown later), I tell it to check the string = = "1". If so, output "it is 1!", Otherwise, the st…… -
Java – which class is the superclass of all classes
I am a JAVA beginner I'm a little confused about the superclasses of all classes in Java? Solution From object documen…… -
Java and python ^ operators
For the CompSci class, we are looking at the Java math class As my stupid programmer, I try to use the ^ operator inst…… -
Java – scanner class hasnextline infinite loop
Why does this code enter an infinite loop when I try to give it a basic text file? import java.io.File; import java.io…… -
Java – what does “J” mean in a JApplet?
翻译错误 Invalid Access Limit Solution When sun started working on swing, they were like javax swing. Something like a…… -
Global sum error of multithreading in Java
I'm new to multithreading in Java. I made some code to see how it works I use global = 0 as the global int variable an…… -
Sorting point lists using java
See English answers > sort ArrayList of custom objects by property 25 Solution Yes, create a custom comparator and …… -
Java and windows – error: illegal escape character
I have finished changing registry data Java file But I'm running runtime getRuntime(). An illegal escape character err…… -
Java – Android runs the functions in the class in a new thread
I have this Code: MyClass tmp = new MyClass(); tmp.setParam1(1); tmp.SetParam2("Test"); tmp.setParam3("Test"); ... The…… -
RxJava`Completable. Andthen ` no continuous execution?
I have a use case. I initialize some global variables in a completable and use them in the next step of the chain (usi…… -
Java multi-level inheritance – protected instance variables in level 1 classes
I have a problem with multi - level inheritance in Java All three classes are in the same package I have class A: publ…… -
Java – a space saving data structure used to store and find a large number of (evenly distributed) integers
I need to find and find a million evenly distributed integers in memory Background: the above integer problem is a sim……