Recent questions tagged java

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java - scrollbars in JTextArea

How do I add scrollbars to a JTextArea? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to change the JDK for a Jenkins job?

I have imported the jenkins jobs from existing jenkins server from another machine. But the problem is, it has the ... help me too. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - add controls vertically instead of horizontally using flow layout

I am adding checkboxes on JPanel in FlowLayout the checkboxes are being added horizontally. I want to add ... is the possible solution? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to use an array constant in an annotation

I would like to use constants for annotation values. interface Client { @Retention(RUNTIME) @Target(METHOD) ... workaround for this problem? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - what is difference between integer a = 5 and new Integer(5)?

if i write below code(in java): Integer a =new Integer(5); Integer b=new Integer(5); if(a==b){ ... and creates another object Integer b=5 ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What is the difference between synchronized and static synchronized?

For a travel booking web application, where there are 100 concurrent users logged in, should ticket booking ... "static synchronized" method? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Create a binary tree from an algebraic expression

I have to create an arithmetic evaluator in Java. To do this I have to parse an algebric expression in binary tree ... what I want. Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - NTAG212 Mifare Ultralight with Authentication

I am new to NFC Android and I have been stuck for days trying to get the Page 4 to page 7 of ... and all possible resources. TIA, Kenster See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to read database configuration parameter using properties file in hibernate

In my apps I am using hibernate, to connect a with database and create a session. this is my hibernate.cfg. ... there? how to do that properly See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java ee 6 - GlassFish: How to set Access-Control-Allow-Origin header

I am using the latest version of GlassFish. I want to set the Access-Control-Allow-Origin header in response so ... find out where to set it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to draw a clock with JavaFX 2?

Given an hour and a minute, I want to draw an analogous clock. I was able to create a Group with a Circle, ... and how to place and rotate them. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When to use static method and field?

I know what static is, but just not sure when to use it. static variable: I only used it for constant ... static and non-static fields/methods? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get term frequencies in Lucene

Is there a fast and easy way of getting term frequencies from a Lucene index, without doing it through the ... TermDocs is way too slow. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - recursively sum the integers in an array

I have a program that I'm trying to make for class that returns the sum of all the integers in an array using recursion ... (a[n-1]); ^ 3 errors See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Configure Spring Boot for SPA frontend

I have application where whole frontend part is laying in resource. I would like to separate things ... BasicAuthenticationFilter.class); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Keyspace schema import and export in Cassandra

I have a Cassandra 1.1.2 installation on my system as a single node cluster and have three keyspaces: hotel, ... that how should I do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - GWT RequestBuilder - Cross Site Requests

I'm trying to make Cross Site Request using GWT Request builder, which i couldn't get it to work yet. As you can ... (e.getMessage()); } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I use JDK6 ToolProvider and JavaCompiler with the context classloader?

My usage case is compiling generated source files from a java program using the ToolProvider and JavaCompiler ... the context classloader. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Controlling the classpath in a servlet

My servlet application includes a number of library .jars, some of which contain embedded log4j.xml or log4j. ... .xml via the classloader? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to query an M:N relationship with JPA2?

I have an an object (BlogPost) that contains an M:N collection of elements (Tags). How to query for an ... -Criteria) would be fine too. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JPA - Entity design problem

I am developing a Java Desktop Application and using JPA for persistence. I have a problem mentioned below: I ... to get around this problem? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why won't PhantomJSDriver use the capabilities I set?

I'm setting some capabilities for PhantomJsDriver. DesiredCapabilities caps = new DesiredCapabilities(); caps.setJavascriptEnabled ... I set? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to iterate through columns [rows] of a multi dimensional array

I am using a multi-dimensional array to store the total amount of product sold (products range 1 to 5) by ... total }//end Sales class See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Reflections library not working when used in an Eclipse plug-in

I have developed an application using the Reflections library for querying all the classes having a particular annotation ... puzzled about it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring Security - Url with request parameters rules ignored

I have a web application that uses spring security. It uses <intercept-url ../> elements to describe the ... provided here was not working. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Using jBCrypt to salt passwords in Android App causes a long hang

I am using the jBCrypt Library to hash user passwords when they register using my app. I am using the basic ... got sent anywhere. Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Antlr IDE in Eclipse doesn't work

I'm using Antlr v3 and java for a project and all goes well in AntlrWorks, but when I switch to Antlr ... eclipse: Antlr Parser Generator v3.4 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - XSSFWorkbook takes a lot of time to load

I am using the following code: File file = new File("abc.xlsx"); InputStream st = new FileInputStream(file) ... of the original xlsx file? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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