Java
-
Running continuous commands linux using java runtime Exec
I need to run two linux commands using java code, as follows: Runtime rt = Runtime.getRuntime(); Process…… -
JSF – deploying the primefaces application to glassfish4 will result in Java lang.NoClassDefFoundError：org / apache / commons / fileupload / FileItem
I want to use < p: calendar > in the JSF application I developed in NetBeans, so I added the primefaces library …… -
Java – internal classes in the interface
We can have a class inside the interface, which has different interface implementation methods I have a question here,…… -
Java – regular expressions are slow. How to check whether a string is only word characters fast?
I have a function to check that a string (most strings have only one CJK character) has only word characters. It will …… -
Java – JUnit: use parameterized types – arrays to assert the equality of collections
I try to assert the equality of the following sets: String[] arr1= new String[] { "1","2","3" }; Collection<String[…… -
java – Linux x86_ Cassandra startup error 1.2 on 64 six
Try from the latest stable version – 7000 – 1.2 6 installing Cassandra on Linux I have modified cassndra Yaml points t…… -
Java opencv Tesseract OCR “code” region
I'm trying to automate someone's manual conversion of code to digital code Then I started reading about OCR So I insta…… -
Java – what is the difference between int and integer in this script?
import java.util.Arrays; import java.util.Arrays; import java.util.List; import java.util.ArrayList; public class arr…… -
heroku – system. Properties and Java version
I wanted to deploy my java 7 application to heroku, but I encountered some problems with the Java version I added syst…… -
Java – place the application icon in the Android project
This is a stupid question, so I'm sorry. If I was asked before but I can't find the answer, I'm not even sure whether …… -
Java – get arrayindexoutofbound: 1 exception
I try to parse a string and store it in a string array When I try to parse the string "Log1", I can parse it Run the f…… -
Javafx-2 – what is this public API in JavaFX that needs to be clarified?
I am very concerned about the term public API in JavaFX speakers >What is a public API? What should it mean? > I…… -
Java – how to delete all child rows when deleting a parent using Hibernate?
I have two tables // Accounts @OneToMany(mappedBy="accounts",cascade=CascadeType.ALL) @Cascade(org.hibernate.annotatio…… -
How do I add subcomponents and new properties to a custom JavaFX control?
I want to create a new JavaFX component and use it in fxml How do I define the usage possibilities and subtypes of thi…… -
Java – wicket dropdownchoice cannot use propertymodels normally
I've been trying to debug why my dropdownchoice is just a simple form. Only dropdown and a submit button don't work pr…… -
Java – JDK environment variable with Tomcat (Ubuntu 12.04)
In Ubuntu, I set up the JDK environment (java_home, jre_home), and Java version can be used >No Java defined_ Home …… -
Java – how to find the mysterious information being printed?
OK, so I have a very large java project. I have worked for many years (games, if you have to know) Unfortunately, a my…… -
Java – get ecpoint / ecpublickeyparameters from byte [] of bouncy castle
So far, I have managed to generate ecdhe pairs in the lightweight API of inflatable castle However, I encountered a pr…… -
Java – httpclient: determines the empty entity in the response
I want to know how to determine an empty HTTP response For example, I perform HTTP post on the web server, but the web…… -
Java – real time game development
I want to use libgdx to develop a real-time game for Android I need to update some variables even the dough game is no…… -
Java – jspg0122e: unable to parse El function in WebSphere 8
I am moving my web application from WebSphere 6.1 to WebSphere 8, and I encountered the following error in one of the …… -
Using java to read data from MySQL database
First, I'm using jtextfields to read the user's product name and product quantity For this product, I use SQL query to…… -
Create an empty object in Java?
How did you do it? It's so simple: Name myName = new Name(); I'm a little confused It should be a class without instan…… -
java. Lang. stackoverflowerror Why do I get stackoverflow exception here
I have a list of parent and child items displayed in a hierarchy I want to switch their extended property Therefore, i…… -
Java – which one to choose between calling the function twice and storing the return value in a variable?
I have the following situation I occasionally encounter similar situations Which is more suitable for the following tw…… -
Partitioning and analyzing Java arrays using multithreading
I have to initialize a floating point [12000] 12000 times through the for loop Then I scan the array for values that e…… -
Using other modes except ECB and decrypting with DES will throw “invalidkeyexception: missing parameter”
I basically use http://www.avajava.com/tutorials/lessons/how-do-i-encrypt-and-decrypt-files-using-des.html The code en…… -
Java – StringBuilder using string instead of StringBuilder
I use StringBuilder instead of string in my code But when I look at its source code, the substring () method abstracts…… -
What caused my program to hang without quitting normally? (pipeline, read system call, while loop)
I have a program. I write to the pipeline from several sub processes, and then try to read all messages written to eac…… -
Java – is there any reason to use constants instead of messages?
I want to internationalize my GWT application After reading the documentation, I can't see why constants are used inst…… -
Java – get null when retrieving int from another class
Basically, I did this program, and the computer generated a random card I created a class called 'rndnumber', which ge…… -
Java – convert sentences to arrays and delete characters and print new sentences
Disclaimer: This is a homework assignment The goal of the program is to propose a sentence and then: – convert upperca……