Recent questions tagged Java

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java - How to display an image in a frame?

I am coding a gui and I wanted to use embedde some pictures, but before embedding it in my main program I ... code do not display the picture? 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 - Within resources in JAR

We have a Jar-file. There are 3 folders: 1-st: META-INF 2-nd: resources 3-rd: classes How can ... classes get image from folder resources? 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 - Check if there is enough memory before allocating byte array

I need to load a file into memory. Before I do that I want to make sure that there is enough memory in ... do you have any other suggestions? 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 - HTML in JLabel not showing

JLabel label = new JLabel("<html><body>Hello world</body></html>"); shows nothing. If I get rid of the tags ... ~$ javac -version javac 1.6.0_24 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 ClassNotFoundException

I'm writing my 1st Hadoop application and I'm getting an error. I don't quite understand what some of the detials ... .java:266) ... 16 more 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 is text truncated in PDF with Linux?

I try to format a Date in Jasper Reports and it works with Windows but not with Linux. With Linux the ... and/or line wrapping different? 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 start .jar file (using LWJGL)

Good day! I created jar file (using Netbeans) and i can't start it. This project uses lwjgl libraries. ... will be added automatically by build 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 it possible to set different look and feel for different panels within a same frame?

Say, I have 3 panels added to a frame and for the 1st panel i want to set the metal look and feel, for ... default swing style. is it possible? 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 - Redirect URL for Spring OAuth2 app on Azure with Active Directory: Invalid Redirect URI Parameter

I am following the following two tutorials of the Azure documentation: https://docs.microsoft.com/en-us/azure/java/ ... how can I change 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 - JLabel setText not updating text

I am trying to update a JLabel by using the setText() method, but I can't redraw JLabel. Do I have to use ... .getDocument().getLength()); } } 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 integration - Queue/Poller seems to exhaust threadpool without any action

I have a Spring integration app, attached to an AMQP broker. I want to receive messages from an amqp-queue, ... correct way to configure 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 - Error "Please fix the version conflict either by updating the version of the google-services"

(translated with Google translator) I searched the Internet, everywhere people just change the version in build. ... google.gms.google-services' 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 - Swing component flickering when updated a lot

I've got a couple thousand lines of code somewhere and I've noticed that my JTextPane flickers when I update ... guys have an easier solution. 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 use of an empty abstract class?

I want to know that is there any use of empty abstract class in Java? If so, what is 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 - How to switch from main window to popup window?

I'm not talking about the popups like alert, confirm or prompt dialogs. In the application if I click on a button ... ") but it didn't work. 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 - Header overlap in iText5

I created a header and footer for my PDF document using PdfPTables. I have specified the headers and footers in ... instead of on them. 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 - Attempting to put Android device to sleep, but the PowerManager does not contain a "goToSleep(long) method

I am attempting to put a device to sleep and I have found references all over about using the PowerManager ... elegantly on non-rooted devices. 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 - Special characters in libgdx's textfield do not work

I can use setText("???") but if I type on my keyboard it doesn't show up, this doesn't work either public void ... ; } }); Didn't print ??? 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 - WildFly - getting resource from WAR

I am using the following method to get a resource from WAR file in WildFly: this.getClass().getResource( ... basically stuck. 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 - Basic Authentication using HTTP Commons Client

I am looking at this link an am trying to send requests to the server http://hc.apache.org/httpcomponents- ... doing wrongly. Thanx 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 - Hibernate select before update

In my work i'm using spring with exidirect, hibernate on the server side and extjs on client side. When i ... . Any suggestions ? 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 - Why does my regex work on RegexPlanet and regex101 but not in my code?

Given the string #100=SAMPLE('Test','Test', I want to extract 100 and Test. I created the regular expression ^ ... tools but not in my program? 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 - In Itext 7, how to get the range stream to sign a pdf?

I'm trying to migrate my application from iText 5.5.9 to iText 7 and I have a problem with signing a ... a reference to the range stream? 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 - JaCoCo Not Generating Coverage Reports based on Source File - Method names not clickable

I have a Maven multi module project where the JaCoCo is not generating reports based on the source files. ... names not clickable in report 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 - Jmeter 2.10 HTTP recorder throws keytool exception

I am trying to investigate jmeter and have quickly run into some problems. I am attempting to follow the tutorial at ... Source) ... 46 more 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 - Naming a new object after a string?

I want to have a method that will create an object of the class being and automatically name it "b1" for the first ... the object count++; } } 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 - NumberFormatException while parsing an int

So I am making file reader/writer that can access a given file and save/read from it.I am having a ... write(coordConvertor); buff.newLine(); 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 update array elements in Firestore with Android?

I read this post and this post of the same guy saying that you cannot update array elements. I also read a ... way I can solve this? 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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