Recent questions tagged java

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java - Will the Compiler Optimize this out

Say I have something like this in a C Code. I know you can use a #define instead, to make the compiler not compile ... CONDITION ) { } ....... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JNI Attach/Detach thread memory management

I have a JNI Callback: void callback(Data *data, char *callbackName){ JNIEnv *env; jvm->AttachCurrentThread(( ... have an explanation for this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android NDK: load_library: cannot locate srand

I have an android project where I use native code to do stuff with SIP (using libosip2 and libeXosip2). My ... stlport - the error remains. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Communication between two web application in same server

All, I have 2 web applications, Web1 and Web2, deployed on my tomcat server. I want classes in Web1 to call ... same web application ?. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to fix Hadoop WARNING: An illegal reflective access operation has occurred error on Ubuntu

I have installed Java openjdk version "10.0.2"and Hadoop 2.9.0 successfully. All processes are running ... Djava.library.path=$HADOOP_HOME/lib" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Order of class loading from a .war file

I've got a question regarding the guarantees, if any, in the following scenario (note that the question is not "How ... WEB-INF/lib/ dir or not? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Getting all Classes from a Package

Lets say I have a java package commands which contains classes that all inherit from ICommand can I get all ... Is something like that possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is it possible to get more than 100 tweets?

Is it possible to get more than 100 tweets using the Twitter4j API? If so can anyone point out the way to do so?? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Apache poi date format

Hi i am reading csv file and getting date in 01-01-2011 but i want it in 01-Jan-2011 format when i write . ... for me. where am i doing mistake. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Enums VS Classes VS Interfaces

I have been reading a lot of posts on this site regarding the usage of constants. Question: When should I ... advance for thoughts and opinions. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Signature difference when hiding static method in a subclass

Recently I was playing around with some simple Java code using main methods to quickly test the code I wrote. ... not enforced by the compiler? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Error: More than one file was found with OS independent path 'META-INF/DEPENDENCIES'

I am using Selenium in Java to make an app. I keep getting this error and I have been searching the internet to figure ... /okio-1.13.0.jar') } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get last inserted auto increment id in mysql

I am trying to get the mysql command like mysql_insert_id(); which retrieve the last inserted row's auto_increment ... and also the parameter.. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When should and shouldn't instanceof be used?

I have gone through various articles, but I still do not know why instanceof should not be used. Kindly let me know your thoughts. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why is the letter f used at the end of a float no.?

I just wanted some information about this. float n = 2.99944323200023f What does the f at the end of the literal ... it called? Why is it used? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is there a difference between the generic bounds "Enum<T> & Foo" and "Enum<? extends Foo>"

Are these two (valid) generic bounds: <T extends Enum<T> & MyInterface> <T extends Enum<? extends MyInterface>> ... one "better" than the other? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Jackson mapping Object or list of Object depending on json input

I have this POJO : public class JsonObj { private String id; private List<Location> location; public String ... depending on the json input? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - indexOf in a string array

Is there anyway to get indexOf like you would get in a string. output.add("1 2 3 4 5 6 7 8 9 10); ... an error and not compiling! Any advice ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - I thought inner classes could access the outer class variables/methods?

I did read a number of topics discussing inner classes, and i was under the impression that an inner class has access ... / variable a here? } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Eclipse -- Testng references non-existing project XXX, launch configuration

When trying to run a test as a TestNG suite, I would get a very cryptic error message saying that TestNG can ... see it in the package explorer! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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130 views

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java - Android Studio - Gradle sync error

I have a synchronization error in Android Studio. I Use: 1.0.2 version from canary channel. Gradle: I tried ... Gradle daemon, but nothing.. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Hello world works but then gets error that there's no main?

I have the following simple hello world in Java: class A { static { System.out.println("Hello world") ... " java.lang.NoSuchMethodError: main See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Does Spring embedded database support different SQL dialects?

H2 has a range of compatibility modes for various other databases such as MS SQL Server, MySQL, Oracle, etc ... ? Have I overlooked something? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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384 views

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java - How to get FileInputStream to File in assets folder

I know how to use the AssetManager to read a File from the res/raw directory with an InputStream, but for my ... File in the res/raw directory? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Width of the bar in Jfreechart

Is there a way to adjust the width of the bars in a Barchart? I create my chart with the following code. final ... tooltips? false // URLs? ); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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126 views

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java - Unable to load class for JSP

Exception stack trace org.apache.jasper.JasperException: Unable to load class for JSP org.apache.jasper.JspCompilationContext. ... .htm"); %> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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477 views

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java - Type mismatch: cannot convert from integer to boolean

public boolean clearSelection() { int i = 0; if (!this.m_SelectedComps.isEmpty()) { i = 1; Iterator ... to convert the integer to boolean? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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284 views

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java - Include SVN revision number in source code

My requirement is simple. At the beginning of each file there should be a block comment like this: /* * This ... 't find exactly what I need. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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