Recent questions tagged java

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java - Can Hibernate return a collection of result objects OTHER than a List?

Does the Hibernate API support object result sets in the form of a collection other than a List? For example, I ... Hibernate do this for me? 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 - Array of Generic Interface

Can we create array of generic interface in java? interface Sample<T>{} in other class Sample<T> s[] = new ... ];// for this it shows error 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 - Displaying an ImageIcon

I am trying to display an image on a JPanel. I'm using an ImageIcon for rendering the image, and the image is in the ... this, g, x, y); } } 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 - Array type in generics

I am trying to create an array of generic type. I am getting error: Pair<String, String>[] pairs; // no ... . Any clues why this is happening. 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 - Background image JFrame with content

I have a JFrame with BorderLayout, there are panels on all sides (North, East ,...). In the panels there are ... have to rework most of my code? 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 - JSONArray Exception : Index 50 out of range [0..50). Is there any limit on JsonArray

I'm using JSON in my android application in the following manner: Send request to a URL & receive JSON ... any limitation attached to JSONArray? 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 - Output an ASCII diamond shape using loops

I am trying to write a program in Java that captures an integer from the user (assume data is valid) and then ... left hand side of the diamond. 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 - JComboBox determine if Items are/aren't visible in drop-down list

I tried to determime for every Items if are or not visible in the JViewPort from JComboBox drop-down list (my Friday OT) ... (); } }); } } 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 - Upload and display a MS word Document in Android

I need to create an app that takes a MS word document and lets the user of the app interact with the ... zooming, going forward and backward. 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 does the "J" in JApplet mean?

What does the "J" in JApplet mean? 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 make a JTable column size exactly (or closely) fit contents?

The output from my program is in a JTextArea inside a JScrollPane. It looks nasty: Created BinaryTree.java in I ... real thing, output below: 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 deploy SlingServlet in CQ

I'm trying to create a servlet in CQ to access some back-end services. Then from my page will make ... .FilterHandler.doHandle(FilterHandler.java:88) at org.apache.felix.htt...

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

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java - How do fail-fast Iterators come to know that underlying structure is modified when the throws 'ConcurrentModificationException' is thrown?

Fail-fast Iterators fail as soon as they realized that structure of Collection has been changed since iteration has ... to know the change ? 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 the purpose of a no-arg constructor?

I understand most of the code below. I just don't understand the purpose of the no-arg constructors of Employee and Person ... name + " "; } } 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 pass a Map<ObjectA, List<ObjectB>> to action in Struts 2

I have a event object, inside there is a Map<ObjectA, List<ObjectB>>, the ObjectA is the label, and the list ... > </table> </s:iterator> 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 - Cucumber: Scenario Outline reusing examples table

I have a few tests like below: Scenario Outline: Add two numebrs Given two numbers <number_1> and <number_2> When ... same one for all tests? 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 - Thread sleep inside of actionPerformed method

First of all I want to say I'm aware this aproach is wrong so I'm asking this question because of pure ... me whats going on here? Regards. 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: locking when performing an indirect insertion

I am writing a piece of software that tracks medication usage. I am using JPA to interact with the database. My ... any dose in the collection)? 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 - My code compiles in Eclipse but I get a ClassNotFound at runtime how can I fix it?

What would cause a jar to be added successfully to an Eclipse Java project but then at runtime some of ... found with ClassNotFound exceptions? 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 must I override toString method instead of just creating another method?

Is there anything special about toString that makes it unique and more useful to Override compared to just leaving the ... , "fruit."); } 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 - JavaScript not being properly executed in HtmlUnit

I'm currently developing some tests with HtmlUnit. It's loading a page that contains braintree.js (their form ... a crypto library myself? 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 - Controlled editing of a row selection in JTable

I have a JTable displaying rows from an SQL database. The table is relatively small (only 4 columns and up to ... value); return component; } } 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 - Callback on Tomcat server startup complete

Is there any mechanism, lifecycle event or callbacks, in Spring or Tomcat to notify once Tomcat server startup is completed ... started"); } } } 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 - My JFrame always becomes a few pixels too big.

I am working on this game in Java, and I just rewrote all my window related code from being based on java.awt to ... of why it does 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 - Compile Error: Cannot Find Symbol

I am receiving the error cannot find symbol when the code reaches the recursive call for increment and I have no idea ... ) { return num; } } See Question&Answers more detail:os...

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

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95 views

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java - How to request focus synchronously in Swing?

When I call component.requestFocusInWindow(), Swing enqueues asynchronous FOCUS_GAINED and FOCUS_LOST events rather than ... ); } } 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 implement documentlistener

I have created some textfields from which i want to use the user-input. I have read that i should use a documentlistener, ... (); } }); } } 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 - Comparison method violates its general contract Exception

Below is a block of code that results in exception as indicated, Code : Collections.sort( arrayList, new ... issue in a standalone code? See Question&Answers more detail:os...

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

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