Recent questions tagged JAVA

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java - How to quote/escape identifiers such as column names with JDBC?

Different database servers use different ways to quote and escape identifiers. E.g. "foo bar" vs `foo bar` ... ? Or any alternative solution? 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 - find in MongoCollection<Document>

I have a MongoCollection<Document> in which I assign a collection. I'm trying to find a user by ... the arguments (BasicDBObject, BasicDBObject) 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 - Change boolean Values?

I have a question about boolean values in Java. Let's say I have a program like this: boolean test = false; ... me out that would be great. 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 - Handling HTTP ContentEncoding "deflate"

What InputStream type should be used to handle URLConnection streams that have HTTP Content-Encoding set to ... handled by InflaterInputStream. 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 - What is numeric promotion?

Can any one tell what is numeric promotion? 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 Bigdecimal(double d) construction still around?

I've noticed substantial pain over this constructor (even here on Stack Overflow). People use it even though the ... hear any views on 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 - Why does @FunctionalInterface have a RUNTIME retention?

Said in Javadoc: If a type is annotated with this annotation type, compilers are required to generate an error ... enough, like for @Override. 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 - Twitter date unparseable?

I want to convert the date string in a Twitter response to a Date object, but I always get a ParseException and I ... on Mac OS X. Cheers, Andi 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 @Rule annotated fields in JUnit has to be public?

In JUnit test case, a field annotated by @Rule must be public. It breaks a common Java coding convention (all ... main/java/org/junit/Rule.java 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 - Unable to open the port by calling Native method from ITLSSPProc.dll

This is native method from ITLSSPProc.dll NOMANGLE int CCONV OpenSSPComPort (SSP_COMMAND * cmd); Here, SSP_COMMAND is ... is actual problem.. 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 - bubble sort implementation on linked lists

I have to implement a BubbleSort algorithm on a Linked List instead of an array. I'm new to java so I don't ... (); list.display(); } } See Question&Answers more detail:os...

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

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500 views

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java - How to display only the filename in a JavaFX TreeView?

So i have figured out how to get all the files and directories and add them to the treeview but it shows ... help would be greatly appreciated. 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 can i display pie chart in jsp page?

<%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 ... this page? Thanks in advance. 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 can i resolve-oracle-11g-xe using eclipse

I am trying to make a sample JDBC program i which i have to create table but i am facing this issue i ... ojdbc14_g.jar file in my buildconfig. 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 - DataFormatter on cell containing date renders two digits years

I needed to get cell data from Excel files as they look like and bumped to DataFormatter class of Apache PO. ... be any solutions 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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119 views

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java - NullPointerException while using Android's mediaplayer

I have two button and it will play a sound to notify about right choice, or wrong one. This is how I do it: ... { playSuccess.release(); } }); See Question&Answers more detail:os...

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

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277 views

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java - Struts 2 #{} giving compilation error in Netbeans 7.3

I'm using Netbeans 7.3 and I've created a maven Struts 2.3 project. Everything else seems fine, except when I ... to do with NB plugins AFAIK. See Question&Answers more detail:os...

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

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263 views

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java - Base URL in Internet Explorer and JSP

Internet Explorer doesn't support HTML <base> tag and even other browsers do, there are some problems when redirect ... 'text/css'> </head> See Question&Answers more detail:os...

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

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633 views

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java - NoSuchMethodError: com.google.common.base.Preconditions.checkState(ZLjava/lang/String;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)V

Getting the following error: java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkState(ZLjava/lang/ ... a maven project See Question&Answers more detail:os...

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

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277 views

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java - Given the number of a Unicode code point, how can I obtain a String or CharSequence object for that character

I have seen Questions and Answers about obtaining the code point number of a Unicode character in Java. ... hardcoding the Unicode characters. See Question&Answers more detail:os...

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

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338 views

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java - JSP download - application/octet-stream

I have a page in JSP that list some file that could be downloaded by a user. Thoses files are not on the local ... Dec 2009 18:52:18 GMT 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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420 views

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java - Exception in Application constructor when using JavaFX

I recently started learning JavaFX, and got this code from a book that is using JDK 9. When I ... .run(InvokeLaterDispatcher.java:96) See Question&Answers more detail:os...

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

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156 views

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java - Connection pool on app engine with Cloud SQL

It sounds like the newer cloud SQL JDBC drivers for app engine (1) support connection pooling. Our app uses ... = com.mysql.jdbc.GoogleDriver. See Question&Answers more detail:os...

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

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279 views

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java - Accessing kerberos secured WebHDFS without SPnego

I have a working application for managing HDFS using WebHDFS. I need to be able to do this on a Kerberos ... token).openConnection(url, token); See Question&Answers more detail:os...

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

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641 views

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java - Multiple submit buttons in Struts 2 form tag

I'm trying to point a button in my form tag to a different action/action class than the form but it won't ... form that's already mapped to one? See Question&Answers more detail:os...

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

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182 views

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java - Calculate running total in JTable

I need to populate a column in my JTable that computes a running total as is shown below. ID Name Position Salary Total ... ); } return c; } } See Question&Answers more detail:os...

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

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373 views

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java - Guava Cache, how to block access while doing removal

I have thread A, inserting a new element to Guava Cache, and because of the Size policy, the cache will evict ... while R is doing its job? See Question&Answers more detail:os...

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

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320 views

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java - why a "" in the 0th index of an array on perfoaming a split() w/o delimiters?

public static void main(String[] args) { // TODO Auto-generated method stub String str="aaabbddaabbcc"; String[] ... index of the str2 array? See Question&Answers more detail:os...

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

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