Java
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Java – the easiest way to check whether a string consists of unique characters?
If a word consists of unique letters (case insensitive), I need to check Java Because the direct solution is boring, I…… -
Java – exception: zlib input stream ended unexpectedly
There is a problem with gzipinputstream or gzipoutputstream Read the following code (or run it to see what happens): d…… -
Java – the easiest way to check whether a string consists of unique characters?
If a word consists of unique letters (case insensitive), I need to check Java Because the direct solution is boring, I…… -
Java keylistener stutters
I make a very simple table tennis game in Java. I'm using keylistener to do this I want it, so when the user presses t…… -
Java – how to disable automatic updates in Hibernate / JPA
Can I stop hibernate from automatically updating persistent objects? @Transactional public ResultTO updateRecord(R…… -
Java – things to consider when building a framework
We are planning to build a framework: a cost estimation framework that will be used in all areas of our organization T…… -
Why doesn’t Java convert int [] to integer []
When I do the following things, >Arraylist1 – contains an element that is an int []. > Arraylist2 – not compilin…… -
Java – performance overhead of AOP
I wonder if there are any major performance problems if AspectJ is used to intercept every (or most) method in the app…… -
Does it make sense to use a simple framework for Java Web applications?
I have done a lot of Java Web development using JSPS and servlets, and I find this method direct and flexible Some of …… -
Java – can I get the SQL alias of the connection table of Hibernate sqlrestriction?
I have a person class that has an alias for a collection of strings that represent additional names that people may go…… -
Java – MySQL does not reconnect with JNDI Tomcat 6
I am using JNDI and Tomcat6 to manage my MySQL connection, my Catalina / domain com / ROOT. XML includes: <Resource…… -
Automated unit testing for maintaining object method contracts in Java?
When developing Java applications, I often rewrite object methods (usually equals and hashcode) I want some ways to sy…… -
Java – can I use spring’s @ component on enumerations?
I use spring 3.0 X and follow the enumeration singleton pattern of one of my implementations public enum Person implem…… -
Java – eclipse – declare variables based on return or get (shortcut)
I don't know how to use this phrase in search, but if there is a shortcut in eclipse that allows us to declare a varia…… -
Java – query the usage of this variable in recursion
After calling the method, node.nth(5) In the following code, public class List_Node { int item; List_Node next…… -
Java – is it possible to define a Jax RS service interface separate from its implementation (using eclipse and Jersey)?
I don't know if the title is confusing, but let's say I have this interface: @Produces(MediaType.APPLICATION_JSON) @Pa…… -
Java – authenticate Active Directory via Kerberos
I'm building an Android application that requires different levels of authentication. I want to use active directory t…… -
Java – spring data rest: the repositoryeventhandler method was not called
I tried to add a repository EventHandler to the rest repository as follows: @RepositoryRestResource(collectionResource…… -
Multithreading – are semaphore P and V operations atomic?
Are the P () and V () operations that can be performed on semaphores atomic? Can semaphores prevent two processes from…… -
Java – shift bit operator, shift by negative number
I encountered an interesting situation when using the bitwise shift operator If the second operand is negative, how do…… -
Java – JBoss as 7 cannot inject resource using @ persistencecontext_ Local container managed entitymanagers
I am using JBoss as 7.1 1, and you can configure a new JTA data source and connect it to my EJB @PersistenceContext(un…… -
Java – proper use of bonecp
I just started using bonecp and extracted JDBC code from the author's website I have a function called getconnection (…… -
Java – a good way to filter lists sorted by attribute and by date
I have very simple things to do. I have such a list of personnel: [{ name: John,date: 01-01-2018,attend: true },{ …… -
Java – can I force the elimination of what rhinoceros calls overloading?
Perform the following tests: public static class Scripted { public void setThing(List<?> list) { Sys…… -
Java – should the main method copy input parameters?
One can imagine this Code: public static void main(final String[] args) { // do something } It should be public sta…… -
How to handle exceptions in map() in observable in rxjava
I want to do this: Observable.just(bitmap) .map(new Func1<Bitmap,File>() { @Override…… -
Java – how do I find out if an object is an integer or isa string or isa Boolean?
I have an object that I want to detect, so I can call if (obj isa Integer) put(key,integerval); if (obj isa String…… -
Warning: [unchecked] unchecked call put (k, V) as a member of the original type Java util. Hashtable localParams. put(name,values);
I have two warnings: HELPDESKGESTION2\src\java\glpi\filter\LoginFilter.java:289: warning: [unchecked] unchecked call t…… -
What does the Java – loadload barrier really do?
In Java, when two threads share the following variables: int a; volatile int b; If thread 1 executes: a = 5; b = 6; Th…… -
java. io. IOException: invalid keystore format
Who knows how to solve this problem? When I click on more details, I get this: at sun.security.provider.JavaKeyStore.e…… -
Java – NFC and NFC tools to create nDef applications
I tried to do what I would guess would be simple, but it turned out not to be I have an acr122 NFC reader and a bunch …… -
Java – Jackson renames the original Boolean field by deleting ‘is’
This may be repeated But I couldn't find a solution I have a class public class MyResponse implements Serializable { ……