Recent questions tagged Java

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java - Save using JFileChooser with pre-populated file name?

I am trying to make saving and loading easier for some GUIs that I've made, and I would like to be ... have any intuitive access. Any ideas? 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 speed up this swing animation?

I am drawing an animation onto a swing JPanel. The 1024x1024 screen is divided up into 2000 pieces which cover the ... when i use the panel. 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 - ERROR: You have an error in your SQL syntax in Hibernate

I'm having a problem with a record deletion from data base. I've been trying to figure out what i'm ... Any help would be gladly appreciated! 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 - Jar can't access txt files

I'm pretty new to Java and I'm facing a problem that I can't find a solution for. I have written a ... still have access to the Txt 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 - unable to start .bat file from JSP

I have a batch file runthis.bat dir >dir.txt If I double click on this, a text file is being created ... running. Whats might be 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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767 views

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java - Calculating total value in JTable Column using new value

I want to calculate total value in index [0][2], previous value is 0, but I have replaced and display it ... , I would appreciate it, thank you 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 properly structure localized content in Cloud Firestore?

I'm thinking about migrating to Cloud Firestore from realtime ratabase and wondering how I can properly setup the ... for any 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 relative path

Using the snippet below throws me a null pointer exception, but i can't find the reason: String path = ... What do i miss? 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 - Multiple Xodus app to access/share single directory

According to the comment from this post "I have xodus directory I wan to share between two applications.. ... the same Xodus directory. 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 - Dataflow streaming job not scaleing past 1 worker

My streaming dataflow job(2017-09-08_03_55_43-9675407418829265662) using Apache Beam SDK for Java 2.1.0 ... and maxNumWorkers=10. 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 - Multiple annotations found The matching wildcard is strict, but no declaration can be found for element 'ehcache:annotation-driven

I am using spring to develop my application. In xml file i create a bean of ehcache. This line of code show ... me how can resolve this 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 - executable created with "jpackage"silently fails if jar is missing

We have packaged our application with jpackage and it works nicely. Somehow someone inadvertently deleted the main ... useful error message? 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 - JavaFX rectangle doesn't update

I'm trying to do a maze resolver with a cellular automaton but I have a display problem for each new ... problem seems to come from JavaFX 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 - Infinite loop application - for(;;)

I am trying to understand the concept behind the for loop example for (;;) { //write code } I understand ... of looping structure be applied to? See Question&Answers more detail:os...

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

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772 views

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java - Print largest number in a 2d array - why do my code print three numbers

I am trying to print out the largest number in a 2D array. My problem is that my output are three numbers ... out.println(maxValue); } } } See Question&Answers more detail:os...

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

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819 views

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java - How to perform multiple actions and click on the link with text as Member Login on the url http://www.spicejet.com/ through selenium-webdriver

I tried the below code but it is not mouse hovering and clicking on 'Member login' WebElement lgn = driver.findElement ... ().build().perform(); See Question&Answers more detail:os...

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

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635 views

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java - How can I implement the Merge Sort algorithm with 4-way partition without the error ArrayIndexOutOfBoundsException?

I am trying to implement the Merge Sort algorithm with 4-way partition in Java, the problem is that it ... type of algorithm. Thank you. See Question&Answers more detail:os...

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

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851 views

1 answer

java - calling notify is not waking up the other waiting thread

I have two threads, T1, and T2. both has its own array list, and I want to remove one element of the array list ... up T1? and how to fix 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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780 views

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java - JavaFX Task ending and JavaFX threading

I only just started learning about JavaFX today and I was trying to learn more about it by making a Snake clone, ... or how I could fix 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 - No blanks in JTextField

How can I forbid users to put blanks into a JTextField? It should not even be possible to write blanks. See Question&Answers more detail:os...

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

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856 views

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java - Transform an object to a list[object] in Realm as migration ( How can i replace a list[objects] with object field in Realm? )

I want to import existing token into tokenList as first item , for example if someone has a token="abc" after ... "Token") private Token mToken; See Question&Answers more detail:os...

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

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859 views

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java - Get position of Click JTable while using Cell renderer

I'm currently using a JTable in Java to display a large amount of text information, and as such have implemented ... is clicked in the JTable? See Question&Answers more detail:os...

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

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677 views

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java - Is it possible to write your own objects that give out ActionEvents?

I've looked at the java tutorials online and they all seem concerned with catching ActionEvents given out by ... help is greatly appreciated. See Question&Answers more detail:os...

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

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774 views

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java - Convenient way to extract data from the MtGox/PubNub JSON API?

I'm using the PubNub API with Java for pulling data from MtGox. When retrieving data, the API delivers ... information stored in the JSONObject? See Question&Answers more detail:os...

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

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692 views

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java - How to send the string array of values in one key word using post method to the server

I am using this code but i am not able to send the string array: httpclient = new DefaultHttpClient(); ... resEntity = response.getEntity(); See Question&Answers more detail:os...

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

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925 views

1 answer

java - Placeholders in properties file are not replaced in target by maven

I have a filter.properties file that contains the following : database.driver= mydatabase database.url= myURL ... welcomed. Best 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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747 views

1 answer

I have a post endpoint in my controller in spring that looks like so @Autowired private BookRepository bookRepository ... the above scenarios? See Question&Answers more detail:os...

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

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1.3k views

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java - Type mismatch: cannot convert from int to boolean in while loop

I just started learning java, tried to find the answer but I guess I'm not smart enough. I'm trying to write an array ... ; i++; } save.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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