Recent questions tagged java

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java - What is the difference between google's ImmutableList and Collections.unmodifiableList ()?

From ImmutableList javadocs: Unlike Collections.unmodifiableList(java.util.List), which is a view of a separate ... , height) method)? 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's the difference between adding DAY_OF_MONTH or DAY_OF_YEAR to a Calendar object?

I want to increase a certain date by 1 day. I create a Calendar object like: Calendar cal = Calendar. ... different results for the two? 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 - Difference between printStackTrace() and toString()

I'm curious as to what the difference is between printStackTrace() and toString(). At first sight, they seem to do the ... // OR e.toString() } 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 clear JTable

How can i clear the content of the JTable using 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 - Is there a way to discover all endpoints of a ReST API?

I'm wondering if its possible to programmatically discover all the endpoints of a particular API. So for ... created in your controllers? 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 - Spring Security permitAll not allowing anonymous access

I have a single method that I want to allow both anonymous and authenticated access to. I am using Spring ... inside a logged-in session. 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 - Exception.getMessage() is null

Inside my Java code, it is checking for !null condition and throwing an Exception. For example try { if (stud. ... Why is the e.getMessage null? 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 instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]

I am developing an application with Hibernate and I get an Exception when I connect with database. The exception ... User.java:57) at com.cartif.zigbee.ZigbeeDriverImpl.checkUser(...

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

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java - Difference between openjdk-6-jre, openjdk-6-jre-headless, openjdk-6-jre-lib

I am having trouble understanding some of the basics of Java JRE. I need to run Java code in an embedded system ... in size (MB) between them. 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 - Usage of @see in JavaDoc?

When do I use @see when dealing with JavaDocs? What is its usage? For example if MethodA calls MethodB then do ... not really what that means! 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 keep track of listeners in Firebase on Android?

I have a list of chat rooms for a given user at one location, and total number of messages for a ... listeners for a given firebase location? 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 configure oAuth2 with password flow with Swagger ui in spring boot rest application

I have spring boot rest api (resources) which uses another spring boot authorisation server, I have added Swagger ... what I am missing 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 - MyBatis Insert List values

Mapper.xml (Mapper xml file) <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-/ ... : ORA-00913: too many values 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 effectively debug C code that's wrapped with JNI in Eclipse? (Android Dev)

I've got a segfault but I have absolutely no idea how to locate it. Tips? 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 - For each loop using 2D array

This is the snippet of Java code: int[][] uu = new int[1][1]; uu[0][0] = 5; for(int[ ... homework. I am preparing for Java certification. Cheers 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 - finding similar colors programmatically

I have a buffered image in java and I want to record how similar each pixel is to another based on the ... how to implement this with that. 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 run terminal command in Android application?

How to send a command to the terminal through android app and get the output back? For example, sending "ls /" and ... to print it in the GUI? 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 - WindowManager with Animation (is it possible?)

Is there any way to inflate a view with WindowManager using Animation (at android's project)? I just ... .popupLayout.setVisibility(VISIBLE); } 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 handle Play Framework 2 database evolutions in production

It seems that whenever I change my models, Play Framework asks me to run a script that deletes my entire ... Postgres, and hosting on heroku. 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 - JPA- Joining two tables in non-entity class

I am a newbie ,tried to google but I am unable to solve my query. Please help. I am trying to map two ... which class from the above? ) }) 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 - Transparent action bar and status bar like Uber

I've done a few researches on this topic but I couldn't found some solution for my App/ Activity. I have ... solution for me. 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 - Troubleshooting Grails/Groovy memory leaks?

I've got a Grails application that does a fairly decent amount of domain object creation and destruction, and ... tracking down the 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 - why polymorphism doesn't treat generic collections and plain arrays the same way?

assume that class Dog extends class Animal: why this polymorphic statement is not allowed: List<Animal> myList = new ... ] x=new Dog[3]; 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 do I connect to a Websphere Datasource with a given JNDI name?

I'm using Websphere Portal 7.0 and creating a portlet with RAD 8.0. My portlet is trying to make a db2 ... and connecting to the database now. 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 final keyword is necessary for immutable class?

Could you please clarify that why final keyword is required before class when we are making it an immutable one ... difference does that make? See Question&Answers more detail:os...

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

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179 views

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java - Spring security switch to Ldap authentication and database authorities

I implemented database authentication for my web page and web service. It work well for both, now I have ... created in Apache directory studio 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 - Tomcat throws ClassNotFound exceptions for classes in other open eclipse projects

I have an eclipse project structure that looks something like this: eclipse project a project b All of these ... suggestions? Thanks a lot. 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 use RestTemplate efficiently in Multithreaded environment?

I am working on a project in which I need to make a HTTP URL call to my server which is running Restful ... .class); return response; } } See Question&Answers more detail:os...

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

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