Java
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Save code online (Java eclipse)
At present, I have saved an online copy of my code on Dropbox I wonder if there are any other convenient options, such…… -
Java – enable assertions at runtime in NetBeans
I tried assert example It works normally in commandprompt I run the code with the following command java -ea Assertion…… -
How do I run the server without using a while loop?
I'm trying to create a server program using datagram socket and datagram packet classes, but my current code uses an u…… -
AVL tree rotation in Java
I want to implement Java AVL tree and rotate the tree left and right I didn't get this Anyone can tell me how to rotat…… -
Convert hexadecimal strings to unsigned byte arrays in Java
I get a 14 byte hexadecimal string, such as a55a0b0500000000000022366420ec But I want to compare them with such bytes:…… -
Java – why is enumeration more useful than HashMap in this case?
This seems to be a common problem, but all the items in the suggestion box don't accurately explain what I'm thinking …… -
Java – @ entity entity cannot be resolved to a type
Learn spring MVC and hibernate import javax.persistence.Column; import javax.persistence.GeneratedValue; import javax.…… -
Java – common code when rewriting abstract methods – Design Problems
I have an abstract class like this public abstract Stuff { public abstract void doStuff(); } Several classes are e…… -
Garbage characters when reading text files in Java
I have a Java call windows bat file that performs some processing and generates an output file if ( filexists("output.…… -
Is there a Java equivalent of the Java sched module?
Raymond Hettinger released a snippet that uses the sched module provided in the standard Python library to call functi…… -
Java – receiving error of profit calculator?
As a novice to Java, my task is to make a profit calculator for a paper boy, but I received this error: Enter the numb…… -
Java – Import wildcards do you always import everything?
I'm working on a small program and using arrays, so I did: import java.util.Arrays; Later, I began to expand what I ha…… -
Java – understanding regex if then statements
So I'm not sure I understand how this works This is what I think is the format of the if / then / else option built in…… -
Java – GWT, RPC security, HTTP headers, authentication and request builder
I assume that GWT RPC actually uses requestbuilder Is there any way to extract the requestbuilder instance used by my …… -
Java – how to fade into JPanel and children?
I know I can fade in the panel by adding an alpha value to the background color and background color Timer However, ho…… -
java – Wait. Until() and webdriver pagefactory elements
I'm using the @ findby annotation to find elements on my page like this: @FindBy(xpath = "//textarea") public Inpu…… -
Java hibernate selects multiple rows from the table and assigns the results to the list
I want to select multiple rows / records from the table and put the results into variables Then I want to print each l…… -
Java – error: invalid content found starting from element ‘x’ Expected ‘{x}’
I'm trying to validate simple XML with simple XSD, but I always get this error: cvc-complex-type.2.4.a: Invalid conten…… -
Java – removes duplicate beans from the list
I loop through a set of beans and check something and add it to the list I just want to add a specific item List<Pa…… -
Java – why system out. Println must be inside the method?
class Employee { class Employee { int DOB; int eid; String name; double salary; System.out…… -
Java character set / character encoding
I have a Spanish file, so it is full of the following characters: á é í ó ú ñ Ñ Á É Í Ó Ú I have to read the document,…… -
Improve performance when working with images in Java
I'm writing a program that includes an image folder (usually about 2000 JPEG images) to resize them and add them to th…… -
Java – find the largest prime number in 600851475143?
I tried from http://projecteuler.net Problem solving 3 But when I run the program, it doesn't print out public class p…… -
Java – get bufferedimage from and OutputStream
I have a function, int readfull (filehandle, OutputStream out), which reads the entire file from the ssh server and st…… -
Java – SmartGWT: can I color a row in the list grid?
All can color a row in SmartGWT listGrid? Solution In SmartGWT, methods ending in style (such as GetStyle, getbasestyl…… -
Java – internal classes that use the main method cannot be compiled
abstract class Manager { abstract class Manager { static void test() { System.out.println(12); } …… -
Java – solve problems larger than memory limit
I've been thinking about the following scenario recently: suppose you have a huge database and you want to perform som…… -
How to parse time in Java?
I want to know whether Java has a built-in method for parsing time / date, as shown below: 5m1w5d3h10m15s This is 5 mo…… -
January 31 of java calendar
I have the following code: – Calendar calc = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateForm…… -
Java – JTable does not display column headers
This is my first time using GUI, so I'm not sure what caused the problem My uni mission The project aims to develop a …… -
Java – check string contents
I need to perform the following checks: If mystring contains() Any other character Letters A-Z, A-Z, "_, "–", numbers …… -
Why does my java code execute bash commands incorrectly?
I tried to make my java program interact with Linux bash, but something went wrong I have a simple executable prog tha……