javafx

问题 I am trying to run JavaFX application but there is showing the following error Error: JavaFX runtime components are missing, and are required to run this application Until this step, I could not import the JavaFX, and I have done it from /usr/lib/jvm/java-8-openjdk-amd64 Can someone help to solve this error? Thanks beforehand. By the way, I am using lubuntu operating system extra information 回答1: As explained on official OpenJFX website open your intellij idea IDE and create new Project Go to

问题 Somehow, I cannot add items to my ComboBox variable from another class as it always says either the value of variable is null or the return value of its getter is null. I use Scene Builder to build Sample.fxml, with controller as Controller class, luanch the whole thing form UserInterface class FXML <?xml version="1.0" encoding="UTF-8"?> <?import javafx.scene.control.ComboBox?> <?import javafx.scene.layout.BorderPane?> <BorderPane xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http:/

问题 Somehow, I cannot add items to my ComboBox variable from another class as it always says either the value of variable is null or the return value of its getter is null. I use Scene Builder to build Sample.fxml, with controller as Controller class, luanch the whole thing form UserInterface class FXML <?xml version="1.0" encoding="UTF-8"?> <?import javafx.scene.control.ComboBox?> <?import javafx.scene.layout.BorderPane?> <BorderPane xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http:/

问题 I am attempting to create a Pane object with JavaFX that has three different colors: A color for the background, a color for the text, and a color for the buttons. Each of these three colors is determined dynamically at run-time, based on the values of a custom object passed into the method. I figured out how to implement this behavior directly in my code fairly easily, and it seems like I could make use of a controller and an initialize method to set it up with FXML. But I'm wondering if it

问题 I have a programm with 8 mediaplayer, which are controlled like one big video with a single set of controls. I have one Slider to control the time, aka I call all MediaPlayer's seek methods in onMouseReleased of the slider. My Problem is, the mediaplayer hang all the time, without changing their status or calling onError . When I put every seek in a new Thread, these problems disappear msot of the time, but not always and I'm gettign a lot of concurrency issues. Does anybody know the reason

问题 I have a programm with 8 mediaplayer, which are controlled like one big video with a single set of controls. I have one Slider to control the time, aka I call all MediaPlayer's seek methods in onMouseReleased of the slider. My Problem is, the mediaplayer hang all the time, without changing their status or calling onError . When I put every seek in a new Thread, these problems disappear msot of the time, but not always and I'm gettign a lot of concurrency issues. Does anybody know the reason

问题 The task is actually, two cars moving, the cars must be able to avoid collision with the border or with each other by changing the heading for example: rotate the object. ** I got an error for this getRadius() import java.io.FileInputStream; import java.io.FileNotFoundException; import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Bounds; import

问题 The task is actually, two cars moving, the cars must be able to avoid collision with the border or with each other by changing the heading for example: rotate the object. ** I got an error for this getRadius() import java.io.FileInputStream; import java.io.FileNotFoundException; import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Bounds; import

问题 The task is actually, two cars moving, the cars must be able to avoid collision with the border or with each other by changing the heading for example: rotate the object. ** I got an error for this getRadius() import java.io.FileInputStream; import java.io.FileNotFoundException; import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Bounds; import

问题 The task is actually, two cars moving, the cars must be able to avoid collision with the border or with each other by changing the heading for example: rotate the object. ** I got an error for this getRadius() import java.io.FileInputStream; import java.io.FileNotFoundException; import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Bounds; import