Java
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Load the original 64 byte ECDSA public key in Java
I have an ECDSA NIST p-256 public key in the original (R, s) format There seems to be no easy way to load it into the …… -
Java 6 source backward compatibility and SQL
My understanding is that in order to maintain source compatibility, Java never introduces new methods into the public …… -
Java – use characters instead of strings for single character values in StringBuffer append
I am passing the PMD rule appendcharacterwithchar It says avoid in StringBuffer Append concatenates characters into st…… -
Java – how to share a JSF error page among multiple Wars
I'm trying to share an error page (error. XHTML) between multiple wars They are all in a big ear application, and they…… -
Where are Java static variables stored in memory?
class A{ class A{ static int i = 10; static int j = 20; static void getname(){ } } Where are these variables …… -
Java – how to use onclicklistener in the recycle bin view?
See English answer > recyclerview onclick34 package com.albumlist.albumlist; import android.content.Context; impor…… -
Java – iterative weakhashmap
I also use weakhashmap I want to implement fine-grained locking based on an integer parameter; If thread a needs to mo…… -
Java – how to automatically split large strings in IntelliJ ideas?
I'm testing with a long string So I need to split such a large string: privat static final String TOO_LONG_JSON = "{fi…… -
Java swing – running on EDT
I have a few questions about swing and use EDT to update the GUI I've just started reading this, so I'm a new beginner…… -
RSA encryption in Java: cross platform issues?
situation I am using RSA encryption in Java I am loading the data on HTC saphire (32b) developer's mobile phone with A…… -
Java – can Maven generate exe files and Mac OS X applications?
Let's say you created a java desktop application with jars and some dependencies and possible license text files I kno…… -
MediaPlayer. Java. In the displaying () method lang.IllegalStateException
public static MediaPlayer mp=null; public static MediaPlayer mp=null; public static void playGeneric(int name,final Im…… -
Use “this” and method (in Java)
What about using the "this" method in Java? Are there selective or mandatory situations? The only thing I encountered …… -
Does Java – Maven dependency plugin use the same other types of artifact resolution as other mavens?
If I use the Maven dependency plugin, I cannot use the version range In addition, it seems that the version of a defin…… -
Java EE – compare openejb with GlassFish
Can we replace GlassFish with Tomcat / openejb for lighter applications? What are the limitations of openejb instead o…… -
Java – notificationlistenerservice: NullPointerException on getactivenotifications
According to this tutorial, I try to implement notificationlistenerservice in my application: http://www.kpbird.com/20…… -
How to call C from Java?
I want to call a C method from Java I read about JNI, but I didn't get how to get all the library files. I should keep…… -
Java – Reference “this” when calling the super constructor?
I have a Class A and write a subclass B. only one constructor is parameterized B must call this super constructor of A…… -
java 7 uuid bug？
I believe I may have found a UUID multithreading error in Oracle java7 update 5. I wonder if anyone can confirm it wit…… -
Java – how do I get a subclass recorder?
I have a subclass and a superclass In superclasses, I have a way to record something When I create an instance of a su…… -
Java – nested bounded wildcards
When I try to compile the following code: LinkedList<List<? extends Number>> numList = new LinkedList<L…… -
Java – vector graphics in IText pdf
We use iText to generate PDF from Java (based in part on the suggestions on this website) However, embedding an image …… -
Java – forces JTable to model “commit” data while still in edit mode
I have a JTable as follows Therefore, when JTable is still in edit mode (a keyboard cursor flashes in the divide colum…… -
Java – random and uniform distribution
I know that if I use the random generator in Java and generate numbers with nextint, the numbers will be evenly distri…… -
Java – what is the difference between length and length?
See English answer > length and length () in java7 arrayone.length; However, for things like array lists or strings…… -
How to get the root node attribute on Java
I have an XML file, as shown below I want to get the latitude and longitude attributes of the pharmacy node I can get …… -
Datetime – dome minutes using java 8
So I was lucky to use Java 8 and the new time API, but I didn't see any rounding function Basically, if the time is 20…… -
Java – spring security and LDAP authentication
I'm trying to set up LDAP authentication. This is my spring security XML file: <?xml version="1.0" encoding="UTF-8"…… -
Nesting enumerations in Java
I want to nest some enumerations The object I represent is flags, with type and value There are discrete types, each w…… -
Java – why does one loop throw a concurrentmodificationexception while the other does not?
I encountered this problem when I was writing a travel salesman plan For the inner loop, I tried one for(Point x:Array…… -
Cassandra Java driver: how many touchpoints are reasonable?
In Java, I connect to the cussandra cluster as follows: Cluster cluster = Cluster.builder().addContactPoints("host-001…… -
Java – why (long) 9223372036854665200d give me 9223372036854665216?
I know the strange things of precision error, but I can't understand it, Why did the (long) 9223372036854665200d give ……