Recent questions tagged java

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java - Dividing a 1D array into a 2D array

So I have homework that asked me to: Write a method that takes two parameters: an array of integers and an ... built-in method to do 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 - How to merge two jrxml jasper report into 1 pdf same page

I tried answer from this site to merge two jrxml jasper into 1 pdf file. Created file contain two page... ... output); exporter.exportReport(); 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 - Want a multidimensional array but get a null pointer exception

1 public class TestWin{ 2 public static void main(String[] args){ 3 int n; 4 hexagon[][] board; 5 6 n = ... on line 8. Does anyone know why? 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 paint a custom component in Swing correctly

I know Swing very poorly, so sorry for stupid question. What I need to do is to make my custom components ( ... it was the farthest from us). 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 - Running pentaho spoon UI in intellij

I have been trying to setup dev environment for pentaho kettle but had some trouble to run Spoon.Java and I see ... only Maven seems to be used. 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 - Trying to synchronize method within runnable

I have a ConcurrentMap that gets instantiated outside of my runnables, but shared and updated within / accross the ... 3 key 1 thread 0 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 - ActionListener and Thread.sleep

I have a JButton, which, as soon as I click on it, I want to change some colors after a few seconds, for ... can I fix that? 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 - Changing Cell Color without changing color in other cells (Jtable)

So say that we have a JTable with 31 columns and 10 rows. And I want to change the color of the 2 Column ... color I am loosing the first 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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java - Unable to load xml file from a absolute path

There is a maven project A. Once I do mvn clean install, the project builds and the jar is available at my ... which is present in C drive. 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 - Jackson's @JsonView annotation does not work

I annotated class User with @JsonView and when it returned I see all fields even than that not contains in ... Secret-key") String secretKey) See Question&Answers more detail:os...

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

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489 views

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java - Update a plot in JFreeChart

I have a parabola plot, coefficients of parabola equation are stored in array a. In mouseDragged (mousemotionlistener), ... array "a" } } 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 - Converting Swift Data into Int16

I have a Java server where I take a short[] and I convert it to a byte[] (Big Endian) and I send it to ... Java short type is a Int16 in Swift. 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 - Receive custom exceptions from Restlet Framework in GWT client

I want to use Exception handling with the Restlet Framework and GWT clients. The Restlet Framework supports ... generator with custom classes? See Question&Answers more detail:os...

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

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554 views

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java - Eclipse suggests Null Pointer exception, though I believe I initialized my object

As the title says I have NPE error. It happens on line: while (getWidth() > bowl.getX()+10) { If I remove it ... (50); } } private GOval bowl; } 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 - Animated GIF leads to SplashScreen being null

I know this is probably close to a duplicate of this thread: Animated GIF in Splashscreen But since it seems ... PNGs. Thanks 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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434 views

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java - comparing two collections for comparing two text files for additions, deletions, modifications

I have two collections as below which hold IDs for Students. The ids are Strings in the format 111-1111. ... modifications?? Thanks for reading! See Question&Answers more detail:os...

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

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639 views

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java - Clarification on modifying a Document's contents from a DocumentListener

From the Swing tutorial on text components: You may want to change the document's text within a document listener. ... a result of a KeyEvent ? See Question&Answers more detail:os...

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

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568 views

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java - Parse sentence Stanford Parser by passing String not an array of strings

Is it possible to parse a sentence using the Stanford Parser by passing a string and not an array of strings. ... "java.io.FileReader" Object. See Question&Answers more detail:os...

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

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548 views

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java - Updating JLabel via SetIcon from bytea data type in postgres

I am retrieving gif images from Wolfram|Alpha. In an effort to minimize queries I want to store those images ... the morning with fresh eyes. 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 - A resource reference binding could not be found

Currently I tried to upgrade a webservice system from Websphere 6 to Websphere 8.5. However I got this kind of ... error with "parent last"? See Question&Answers more detail:os...

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

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616 views

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java - JScrollPane in JTables

I wonder if you guys had problem such if you got some JPanel which got his own JScrollPane and in your panel ... there are too less records). See Question&Answers more detail:os...

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

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798 views

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java - Intellij-idea cannot see generated sources directory

I have a maven project in IntelliJ I have marked the generated sources directory as the source by doing Files> ... able to read from there See Question&Answers more detail:os...

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

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659 views

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java - How to ALTER TABLE using UCanAccess

I am using UCanAccess JDBC-driver (version 3.0.3.1) to connect to the mdb-file. And I need to add the ... But this solution seems awful to 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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542 views

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java - JFrame in separate class, what about the ActionListener?

I'm trying to separate my Swing GUI from my actual code. In short, I want the user to kick off a process (based ... }); cp.add(comboBox); } } 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 - Counting all the nodes in a Linked List

I'm trying to write a simple method to count all the nodes in the linked list. I know there are 7 items in the ... = null; prev = node; } } See Question&Answers more detail:os...

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

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590 views

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java - ivy dependency on external JAR

I am battling with Ivy (I tried maven but had an event more difficult time setting up the JBoss repository ... about Gradle? Thank you! Misha See Question&Answers more detail:os...

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

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431 views

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java - Simple timepicker for a fragment activity

I am trying to launch a timepicker from a edittext in a fragment Buffet_offerings_breakfast_menu2.java public class ... (); } } 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 - JNI: NoSuchFieldError

Output of: javap -s SomeClass public org.someapp.SomeClass$_data data; Signature: Lorg/someapp/SomeClass$_data; Definition ... works just fine. See Question&Answers more detail:os...

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

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