Recent Posts
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Java – quickfixj login problem
There are problems with quickfixj The problem is that I can't send the login message correctly In addition, it's hard …… -
Java – lists implementations that do not resolve casts
I created my own array - based list implementation, and it doesn't limit invalid parameters If I use cast to create my…… -
Aggregate function on list in Java
I have a list of Java objects and I need to reduce it to apply aggregate functions, such as through database selection…… -
Java – does it create a new string object every time I use string?
Suppose I need to iteratively retrieve the value of the same key from Java HashMap for(int i=0; i<INTEGER.MAX; i++)…… -
Does the latest Cassandra support openjdk?
In the GitHub readme, it says > = 1.7 (openjsk and sun) was tested But when I look at Cassandra daemon Java, there …… -
Java uses regexp to split space?
I try to match and capture commands and parameters from the following inputs: !command param1 param2 I am using the Ja…… -
Data structure – hash table – implemented using binary search tree
From cracking the code interview, page 71: I know the basics of linked list, hash table and BST, but I can't understan…… -
Java – multiple phrases in a pdfpcell
I want to add multiple phrases to a pdfpcell So, do this anyway? Please help. The code is like, PdfPCell cell = new Pd…… -
Multithreading – Apache spark standalone mode: number of cores
I am trying to understand the basic knowledge inside spark and spark documents used to submit applications in local mo…… -
Java – you cannot set a custom dimension in Google Analytics properties of Android apps
Please find the tracking code below, GoogleAnalytics analytics = GoogleAnalytics. getInstance(this); Tracker t = analy…… -
Java – how to create a new localdatetime with zero time zone?
new LocalDateTime(“1999-12-31T00：00：00Z”); When I try to create this date, I get: Exception in thread "main" java.la…… -
Java – using web XML and setmaxinactivitinterval set the difference between session timeouts
I asked the user to authenticate in the session and the session timed out after 10 minutes of inactivity After the ses…… -
Java – GWT code server uses Maven prototype and does not find modules in the newly generated project
I have been working with GWT and eclipse for some time. I want to play with Maven and GWT plugin (GWT Maven plugin, en…… -
Can an object array be regarded as a collection of objects in Java?
The collection definition of Oracle site is: A collection — sometimes called a container — is simply an object that gr…… -
Java – spark job server: “the server cannot respond to your request in time”
I'm using spark job server to run spark jobs. It works normally But when I try to do a big job (it takes more than 40 …… -
How do I apply calculations on the springs @ value property?
application.properties: application.properties: //timeout in ms timeout = 20000; @Value("${timeout} / 1000") private …… -
Java – different methods of passing parameters: String args [] or – D?
I've seen many Java use the - D option to pass some parameters The more familiar method is to pass the parameter with …… -
Calling Java methods from native code using JNI
I'm new to JNI I have successfully written some programs that call native methods written in C language Now I need to …… -
Java – changes to Lucene index files during document acquisition / update / deletion?
I'm working on the latest version of Lucene 4.10 2. It combines Java as the front end and Oracle 12C as the database I…… -
Java – reduce the recording of the same exception
Is there any smart way to reduce the record of "equal" exceptions? For example: java.lang.IllegalArgumentException: Wr…… -
Java – run akka with runnable jar
I'm trying to use NetBeans to implement akka. Net in the Java Maven project When I run it from NetBeans, it works norm…… -
Java – is there a limit on the size of the response I can read over HTTP
I have a java program that calls a URL The response to the URL is JSON / string I have to write a program to get data …… -
Java – Android tells me that my bitmap has been recycled before I actually recycle it
I get my bitmap from XML: //Get bitmap from drawable bd = (BitmapDrawable) view.getResources().getDrawable(R.drawable.…… -
java – `String. What is the difference between class’ and ‘new class [] {string. Class}’?
I'm new to Java I have a question as follows: class MyClass { public MyClass(String s){} } MyClass MyObject; Con…… -
Java – special character encoding of errors using resteasy
I am using JBoss EAP 6.3 to develop a web application using resteasy rest framework. There is a bad coding problem wit…… -
Vector – “STD:: VEC” vs “Collections:: VEC”
Rust contains two identical (via API) VEC modules: http://doc.rust-lang.org/std/vec/index.html http://doc.rust-lang.or…… -
Java – create a switch case onclicklistener for textview
I just started programming in Java and had some trouble implementing the onclicklistener switch case for clickable tex…… -
How to call a parameterized getter a mapper in a Java 8 stream?
Use case I currently have this pattern in many adapters: entries.stream() .filter(Entry.class::isinstance) …… -
Java – additional conditions for adding querydsl to on
Can I execute the following queries in querydsl? SELECT p.* FROM parts_table p LEFT JOIN inventory_balance_table i ON …… -
How to use Java Time parses the date in the string from the year and week
In old Java, I could do this: System.out.println(new SimpleDateFormat("yyyy w",Locale.UK).parse("2015 1")); // shows M…… -
Java – why does my socks proxy code throw a socketexception: a malformed reply from the SOCKS server?
Why does my socks proxy code throw a socketexception: a malformed reply from the SOCKS server? I tried on urlconnectio…… -
Java deadlock when synchronizing on local resources?
I see the problem of multiple thread deadlock in the same line of code I can't understand why the thread is blocked on……