Recent questions tagged java

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java - How to stop a JButton going gray when disabled?

I have to write a card game. When a card is clicked a random card image is generated but because you can only ... card5.setEnabled(false); } } } 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 - Matcher's matches() method returns false, find() and groupCount() return results

I have the following code: private static final String ET_AL = "(\p{Punct}|\b|^|\s)et\.? al\.?(\b|$|\s) ... 2. Any help about what is going on? 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 - SQLException: Exhausted Resultset

I have a problem with my JDBC code. This is the relevant code: /** method for checking password into the Oracle ... and how can I solve it? 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 - Where to add the UTF-8 extension in the HTML page?

I need to add the charset="utf-8" at the end of the script tags to get the translation to another language ... 8. Any suggestion please. 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 - upload a file using spring MultipartFile and google app engine

I have been trying to upload a file by using MVC and Google App engine. Every time i am getting the ... the references to resolve the issues. 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 - Hadoop 2.0 JAR files

I am getting an unexpected error when trying to instantiate a Configuration object in my Map/Reduce program. ... difference from some reason. 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 - Can't add to an ArrayList "misplaced construct(s)"

I have a simple arraylist set up, but I can't seem to add objects to it. import java.util.ArrayList; ... anyone explain 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 - Getting permutations of an int[] removing duplicates sets

I have an array of integers 1<=N<=100, How can I get permutations of this array? Array may contain ... duplicate set of permutation arr[]) 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 - Convert TXT file to PDF using iText (keep formatting)

I am trying to convert a .txt file into a .pdf file using iText library. The problem that I am facing is ... Font myfont = new Font(courier); 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 - JasperReports: Getting JRRuntimeException: Error creating SAX parser

We have created reports using iReport4.5.1. It is working properly in iReport. After that we have integrated reports ... do I remove this 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 - Remove border from JComboBox

Do you know any way to remove the border from a JComboBox in Java? I try the following code public class ... Windows L&F if possible. 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 - addBatch() used together with autoCommit = true

I have a situation like this : con.setAutoCommit(true); Statement stmt = con.createStatement(); stmt.addBatch( ... The database is Oracle 11 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 parameter in URL on a form submit in Struts2

I am doing a project in Struts2 where I need of setting a parameter in URL like user parameter in below link. ... ?user=george" method="POST"> 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 - libgdx ScissorStack not working as expected

I'm trying to create a "progress bar" of sorts but the clipping doesn't seem to work the way I expect it to. ... code). Any idea what's wrong? 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 - stackoverflow error when creating object outside the main method

While running this code it shows Stackoverflow error. What is it I am doing wrong, why does the code compile? public class ... (); f2.go(); } } 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 add a border to a checkbox and make it always visible

When I create my PDF the checkbox at first doesn't have any appearence. After I click on it (onBlur) there is ... file); document.close(); } } 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 compareTo() actually return?

The compareTo() method in Java returns a value greater/equal/less than 0 and i know that. However, the value itself ... commands are -5 and -1? 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 - Sending multiple files with Jersey: MessageBodyWriter not found for multipart/form-data

I'm new in java rest application. I'm trying to run an application, but i have this exception message com ... > </dependency> </dependencies> 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 my custom Swing component visible?

I have no idea why it won't show. First I create an instance of the component and then add it to a ... in relation to the other Box components? 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 get the console output generated by a exe file?

without using a redirect to file (">", ">>") 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 get started with JFreeChart?

I have downloaded the latest version of JFreeChart (1.0.14) and want to start using it. I only have imported ... org.jfree.chart does not exist. 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 want to split string without using split function?

I want to split string without using split . can anybody solve my problem I am tried but I cannot find the exact logic. See Question&Answers more detail:os...

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

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117 views

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java - Convert from Object to Original Class

I'm storing a instance of Entry class in an Object. Entry newentry = new Entry(j, 0.0); Object test = ... the Entry class method getValue()? 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 - Maven is failing to download the tomcat-maven-plugin snapshot

Even after wiping out my settings.xml, I still get this error when trying to use this snapshot dependency. Given the dependency ... ------------ 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 - remove rows from JTable with AbstractTableModel

I would like to remove selected row from JTable with AbstractTableModel using a button. The code below works with ... can be used: 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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362 views

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java - Desktop.getDesktop().browse Hangs

I'm working on an application in which if a user clicks on a link, I want it to open in their default browser. From ... e){ log.debug(e); } } 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 - Changing a JLabel's Value from a JSlider's Value

I have a single JPanel that contains a JSlider and a JLabel. I want to configure it so that when the ... Thanks in advance for your help. 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 - set Id (PK) generation value auto and manual

I want to persist User into DB and current scenario of ID(PK) of User created with IDENTITY generation type. e.g ... I can resolve it. 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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