Recent questions tagged java

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java - How to initialize a TreeMap with pre-sorted data?

My app uses a TreeMap to keep data sorted and have log(n) lookups & inserts. This works great in the ... of tree insertion and re-balancing? 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 - Insert only numbers in Spinner Control

I tested Spinner control in Java 8u40 import javafx.application.Application; import javafx.geometry.Insets; import javafx ... used as example? 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 annotation on generic type argument is not visible for nested type?

I don't get the behaviour of following code: https://gist.github.com/tomaszalusky/3e3777b4fd0c6096f3f707bb19b50b52 - ... and Eclipse. 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 - Java8 stream.reduce() with 3 parameters - getting transparency

I wrote this code to reduce a list of words to a long count of how many words start with an 'A'. I'm ... I'm sure I'll come across eventually. 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 - Cannot sign in to Google in JavaFX WebView

I cannot sign in to Google in JavaFX WebView. The page doesn't load when I click the 'Next' button. Other ... launch(args); } } Screenshot here 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 - Populate child bean with Transformers.aliasToBean in Hibernate

I have the next couple of beans: Address { String name; String number; String zipcode; String town; } MyEntity ... creating a new bean? 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 - Differences in type inference JDK8 javac/Eclipse Luna?

I'm trying to switch a project to Java8, and encounter odd differences between Eclipse Luna and javac's ... in TypeInferenceTest match 1 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 - Set proxy on JavaFX WebEngine?

How can I set a proxy per WebView instance? This is what I have so far: public void start(Stage stage) { ... , but a proxy per WebView window. 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 - Printing out a linked list using toString

Ok guys, so I am trying to learn how to print out a linked list. I have all the methods that I would need to use ... ) { this.head = head; } } 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 progress dialog dismiss after webview is loaded?

What do I need to my code to make the dialog dismiss() after the webview is loaded? public void onCreate(Bundle ... dismiss(); } 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 - add objects with different name through for loop

What is the best way to do the following: List<MyObject> list = new LinkedList<MyObject>(); for(int i=0; i<30; ... is the best way 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 - Out of memory problem saving large BufferedImage

I have a problem saving large (f.e. 12 000 x 9 000 ) images. I'm developing a graphical editing software ( ... { } } Thank you 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 - SQL7008 Error - Workaround?

I'm using the JTOpen JDBC driver for a DB2 Universal database. I have very little experience with SQL ... SQL7008 without enabling Journalling? 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 - How to preinstall Eclipse m2e configurators (Plugin execution not covered by lifecycle configuration)

When importing maven projects into Eclipse IDE fresh install, there is a pop-up question to "Setup Maven ... installation failed over network)? 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 - Generate a random binary number with a variable proportion of '1' bits

I need a function to generate random integers. (assume Java long type for now, but this will be extended to BigInteger ... between 0.0 and 1.0? 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 - setDefaultCloseOperation to show a JFrame instead

I am making a word processor application in order to practise Java and I would like it so that when the user ... the window aswell if 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 - How can I check on debug symbol status with Eclipse?

While discussing another question I asked, @Aaron Digulla pointed out the following: If you installed the Java ... the Java development process. See Question&Answers more detail:os...

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

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193 views

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java - How can I get package name in android?

I need to write some util class by myself and I need the packagename of android app. While I found the packageManager ... I do this? 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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104 views

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java - MediaTracker - how to use it, what are the benefits, or is there an alterative?

In the codebase we inherited the usage of MediaTracker was always done locally in each code block. new ... What is the alternative? See Question&Answers more detail:os...

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

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259 views

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java - Android: Null Pointer Exception when calling new intent

I am receiving an error when trying to call new activity through an intent: java.lang.NullPointerException: ... main(ZygoteInit.java:698) See Question&Answers more detail:os...

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

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212 views

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java - PostGIS and JPA 2.0

I'd like to map datatypes from PostGIS with JPA 2.0. I googled for solutions or examples, but all I can find ... anybody a hint for an example? See Question&Answers more detail:os...

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

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104 views

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java - How to get session time out message using Spring security

I want to get the session time out message when the session expires.Below is my spring-security.xml <http auto ... invalidate(); session = null; See Question&Answers more detail:os...

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

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306 views

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java - Image loading and uploading to Firebase Storage not working in android and firebase console showing "error loading preview"

Firebase Storage show "error loading preview" in the firebase console Initially during uploading and loading it ... to firebase expertists 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 - Declaring an instance of a class inside that class

This code shows error at run time: class Animal { Animal object1 = new Animal(); public static void main(String ... prompt to run this code. See Question&Answers more detail:os...

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

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322 views

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java - Replace string in PDF file using Itext but letter X not replace

I'm trying to replace the content of PDF in one text but the letter 'X' are not being replaced. public static ... ) { 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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256 views

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java - Unix sort command takes much longer depending on where it is executed?! (fastest from ProcessBuilder in program run from IDE, slowest from terminal)

I have a java program that uses ProcessBuilder to call the unix sort command. When I run this code within ... close this 20x performance gap! See Question&Answers more detail:os...

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

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216 views

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java - controlling vibration intensity in android phones? is it possible?

I am developing a game. In which, i want do set different vibration intensities for different events. I just ... helpful. 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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366 views

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java - Is there any way to enable or disable the Spring bean definition in applicationContext.xml file?

Is there any way to enable or disable a java bean definition in application context? <bean id="enBean" ... defined in application context? See Question&Answers more detail:os...

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

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