Recent questions tagged JAVA

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java non-static method getBalance cannot be referenced from a static context

I'm trying to refer to a method in another class and use that in a return statement in my other class. At ... () + Account.getBalance(); } 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 - HttpClient - Cookies - and JEditorPane

I've successfully managed to logon to a site using httpclient and print out the cookies that enable that logon ... be greatly appreciated. Dave 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 create a certificate with keytool?

I've looked in 4 (yes, four) tutorials already and still don't get how to get this working. After ... can't do anything with certificates. 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 set the line spacing in a JtextPane?

First of all, i set the JTextPane like this: HTMLEditorKit editorKit = new HTMLEditorKit(); HTMLDocument document = ( ... false); i was 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 - Creating a dot/pixel outside of a JFrame, any location on the screen

I would like the be able to display points on the screen for my Java application. At some point I want to ... draw outside of your JFrame area? 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 weird text back with EditText.toString() method in Android project. Why?

I appear to have a fundamental gap in my understanding of an EditText object. I have an Activity+Layout with ... strange value? -- roschler 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 - Storage Access Framework - failing to obtain document tree from uri (returned from Drive app)

My Android app wants to create a folder in Google Drive and get the uri from the Drive app on the device. It ... handle it as a document tree. 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 and read resource file from jar

I have hibernate.cfg.xml and test.txt in the path which i read by java program. Now when i created the jar ... me know what steps are 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 - painting a particular button from a grid of buttons

The following grid of buttons is defined as : JButton button_x = new RoundButton(); where RoundButton is defined ... paint a particular button ? 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 each element in this array of objects get overwritten by the last object?

I have the following code: public static void main(String[] args) { Player players[] = new Player[2]; Scanner ... been baffling me for hours :/ See Question&Answers more detail:os...

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

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266 views

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java - JavaFx use String with Double on table column

I have a class called "Product", with a double attribute "price". I'm showing it on a table column inside ... an event of something like that? See Question&Answers more detail:os...

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

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257 views

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java - How to define a global page when requested page or method is not found?

I know how to fine a global error redirect page in our defined package when exception encountered that just by ... do something to handle 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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336 views

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java - The table cells are empty in my tableview. JavaFX + Scenebuilder

I am trying to get the table cells to show the string when i create new rows. But all the rows are ... the fxml file from the scenebuilder? See Question&Answers more detail:os...

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

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655 views

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java - How to implement CompletableFuture.allOf() that completes exceptionally once any of the futures fail?

I want to implement a hybrid of CompletableFuture.allOf() and CompletableFuture.anyOf() where the returned ... CompletionStages as input. 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 - Kafka produce to send image

I have the following Kafka producer code. I want to know if I can send image file instead of JSON file? ... catch block e.printStackTrace(); } See Question&Answers more detail:os...

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

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192 views

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java - Force invocation of base class method

The following code when run obviously prints out "B1/A2/B2". Now, is it possible for it to print "A1/A2/B2" instead ( ... B(); b.method2(); } } See Question&Answers more detail:os...

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

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464 views

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java - Chinese Characters Displayed as Questions Marks in Mac Terminal

I am trying to retrieve some UTF-8 uni coded Chinese characters from a database using a Java file. ... the characters are correctly displayed? See Question&Answers more detail:os...

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

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191 views

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java - Connect to MySQL with JDBC over network

I am trying to connect to MySQL database over a network. I have installed MySQL, and the service is running on ... work. Thanks 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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179 views

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java - How to use CCRC to get old file versions?

I'm trying to use CCRC API in order to get, for instance, all versions for a specific file and get some ... setting the config spec ? tks Kleber See Question&Answers more detail:os...

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

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219 views

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java - Create xslt files programmatically

I know that I can create xml files programmatically by using DOM api in java like the following: ... "> Thanks 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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403 views

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java - MLKit BarCode Sanner Implementation results in internal error when executing ML Kit tasks

Every call to scanner.process(image) is resulting in the onFailure call, with the following error: Error:com. ... alpha14" implementation 'com.google.mlkit:barcode-scanning:16.0....

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

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168 views

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java - Media Store not working when folder programmatically created

I am accessing videos, from programmatically created folder, using following code But it returning cursor count 0, ... moviesDir.mkdirs(); } See Question&Answers more detail:os...

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

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481 views

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java - Combine or merge all jars in one executable jar

Kind of a "simple" question here, but it seems complicated to do such a thing using Eclipse. I have a " ... generated JAR file, too ? 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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454 views

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java - Android FileNotFound Exception - Cannot getInputStream from image URL that does not have file format

The title is pretty self explanatory. the following code...: URL imageUrl = new URL(url); try { ... anybody know a workaround? 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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458 views

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java - after catching "InterruptedException", why "Thread.currentThread().isInterrupted()"'s value is false?

as the title. public static void main(String[] args) throws InterruptedException { Thread thread = new Thread(new ... "'s value is 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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272 views

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java - Setting a custom header using BrowserMob-Proxy REST api

I have a browsermob proxy running on port 9091. I am trying to use browsermob-proxy REST API to set a ... Proxy(); proxy.setHttpProxy(PROXY); See Question&Answers more detail:os...

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

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158 views

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java - How to draw images on transparent window?

I'm trying to draw Images with Graphics2D on JFrame. But this code only displays blank background. How to do that ... any help you can provide. See Question&Answers more detail:os...

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

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224 views

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java - why this synchronized method is not working as expected?

Could someone explain two me why these to codes dont output the same results (the only difference between two codes is in the ... 0) + 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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