包含标签：Java 的文章
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Merge sort Java
I'm trying to create a merge sort method, but it continues to give the wrong sort Where do I make changes to actually …… -
Java – can I create a bitmask for ~ 100 constants?
Does this mean that the 100th constant must be 1 < < 100? Solution You cannot do this directly because the maxim…… -
Java – returns the number of rows in a 2D array?
I have this 2D array: private boolean[][] landscape; This landscape array defines a pond with [rows] and [cols] The pu…… -
Char range in Java
The following line of Java code generated an error char c = -128; Solution Char is a data type that is not signed in J…… -
Short condition, Java
I want to test whether the current char is', ',' – ',' Or‘‘ if((current != ' ') || (current != '.') || ...) Any ideas?…… -
Java – cannot run Hello world on drools – kiecontainer does not select DLR files from the classpath
The following documents: 6.1 The basics I created a simple class applicant, which should be checked by using the DRL f…… -
Java – how to avoid code duplication of many small classes?
I have different courses, including English, Spanish, French, etc Class English{ String name = "English"; Stri…… -
How does this java code work?
public static void main(String[] args) public static void main(String[] args) { int [][]shatner = new int[1][1]; …… -
Java date() giving the error date
See English answer > java parsing string to date 1 It is obvious that there are not 43 days in February. I don't kn…… -
Java ternary operators and setting circular index values
I have a loop that traverses the for loop of ArrayList If the condition is met in the for loop: >I delete the curre…… -
Accessing private collection fields in Java
One of my classes has a field containing set This field is only populated in the constructor and then read by other cl…… -
Java – what is the purpose of using aslist?
I just want to know the benefits and purpose of the aslist () method in arrays It returns a fixed size list supported …… -
Java – what is the purpose of the access modifier
Do you need access modifiers in your programming language? Solution See: encapsulation (Wikipedia) Of course, you can …… -
Sorting array lists in Java
I have finished class Here, iris is another class with certain properties public class Helper { Iris iris; do…… -
Java – how to create a new object with the constructor in array list as one of the parameters?
I have a problem with a constructor that takes ArrayList as one of its parameters public class ItemisedProductLine ext…… -
Java – super fast autocomplete using binary search in sort files (300000 lines)
In my android app, I want an input field with autocomplete The number of projects is about 300000 The best solution se…… -
Multithreading – consumer – producer: pauses the consumer if memory usage exceeds a certain threshold
I have a situation where my main thread (producer) allocates a large amount of memory for a task on the heap, some wor…… -
The test with transactionrequiredexception failed: when loading JPA and neo4j configurations, no transaction is in progress
I have a JPA web application that contains some integration tests for the JPA repository At present, there is no integ…… -
Java: parses string array items into, int, double, or string
import java.io.File; import java.io.File; import java.io.FileNotFoundException; import java.util.Arrays; import java.u…… -
Get all users and roles in Java webapp
Question: >Is there a general role for user and concept servlet containers? > If so, is there a container indepe…… -
Java – you want to use transactions in Hibernate queries to delete existing documents from folders and database values in tables
I have a file upload application After uploading the file, create a new document path and save the document in the fil…… -
Java code creates HTML files and dynamically adds lines
I want to create a log in Java HTML file, where I will dump the error to the HTML table row when the error is captured…… -
Java – buildfinished and buildstarted will not work properly
I'm from org apache. tools. ant. Defaultlogger of defaultlogger creates a subclass: public class ExtendedLogger extend…… -
Java – restart jars with root privileges on most, if not all, Linux distributions
I'm developing a Java application that requires root / administrator privileges to run properly If the user does not s…… -
Java – project Euler: procedural optimization of question 7?
So I call myself a fairly novice programmer because I mainly focus on my school hardware rather than many computer sci…… -
Java – why not = = work on a string?
See English answers > How do I compare strings in Java? 23 When I run this code, whenever I type "boy", it will onl…… -
Java generic pairs stored in HashMap cannot correctly retrieve key – > value
This is pair java import java.lang.*; import java.util.*; public class Pair<TYPEA,TYPEB> implements Comparabl…… -
Java – how to allow users to drag and drop releases in vaadin tables?
I have a multi - row table with custom components I want to allow users to delay the release I tried the following cod…… -
Multithreading – multiple UI threads on the same window
I don't want multiple windows. Each window has its own UI thread. I don't need to raise events on a single UI thread i…… -
Java – static variables, patterns and Android performance
I am doing some major refactoring operations. Compared with some performance improvements in Android applications, it …… -
Youtube API search response (Java)
Using Java's Youtube API, I did a video search Load size: / / developers google. com/youtube/v3/code_ samples/java#sea…… -
How do I get the fifth root in Java?
I'm trying to get the fifth root of the number for my program I used math pow(a,b); The way to get this, but for some ……