javafx | 易学教程

How to avoid collision with the border or with each other by changing the heading i.e. rotate the object

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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

JavaFX Dialog对话框

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1. 标准对话框消息对话框 Alert alert = new Alert(AlertType.INFORMATION); alert.setTitle( "Information Dialog" ); alert.setHeaderText( "Look, an Information Dialog" ); alert.setContentText( "I have a great message for you!" ); alert.showAndWait(); 没有标题的消息对话框 Alert alert = new Alert(AlertType.INFORMATION); alert.setTitle( "Information Dialog" ); alert.setHeaderText( null ); alert.setContentText( "I have a great message for you!" ); alert.showAndWait(); 2. 警告对话框 Alert alert = new Alert(AlertType.WARNING); alert.setTitle( "Warning Dialog" ); alert.setHeaderText( "Look, a Warning Dialog" ); alert

javafx设置控件背景颜色，字体等

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package fx.com; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Insets; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.*; import javafx.scene.paint.Paint; import javafx.scene.text.Font; import javafx.stage.Stage; public class Main extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage primaryStage) throws Exception { Button b1 = new Button(); b1.setText("这是按钮"); b1.setLayoutX(100); b1

In javafx how do i change the color of a button, wait 1 second than change it back do default?

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问题 So i want to change the color of a button to light green, wait 1 second than change it back to default. How can i do this? I tried it this way: button1.setStyle("-fx-background-color: lightgreen"); try { Thread.sleep(1000); } catch(InterruptedException e) {} button1.setStyle(""); But i have 2 problems: the color never sets to light green, only to default. if i want to change it only to light green, it only changes after the 1 second of waiting and not before it. Edit: So i got to the part to

In javafx how do i change the color of a button, wait 1 second than change it back do default?

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lost in 3D space - tilt values (euler?) from rotation matrix (javafx affine) only works partially

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问题 it is a while ago that I asked this question: javafx - How to apply yaw, pitch and roll deltas (not euler) to a node in respect to the nodes rotation axes instead of the scene rotation axes? Today I want to ask, how I can get the tilt (fore-back and sideways) relative to the body (not to the room) from the rotation matrix. To make the problem understandable, I took the final code from the fantastic answer of José Pereda and basicly added a method "getEulersFromRotationMatrix". This is working

Internal graphics not initialized yet in JUunit test case

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问题 I'm making a light weight painting application with JavaFx. I've been having some issues with my LayerController class and it's methods addLayer etc. So I thought that writing some JUunit test cases would be a good idea to check the correctness of my methods. To make the story short, I'm painting on a Canvas using its GraphicsContext in a selfmade class which I call PaintGraphics . This class does all the painting. The LayerController needs a PaintGraphics to do its work on the layers. But it

Canvas: hover over text output

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问题 I want to hover over a shape I created in Canvas (JavaFx) and when hovering over with the mouse I want a text output pop-up to display. Is there a built in function for this? I can't find how to do it anywhere... 回答1: Unlike with the scene graph, a Canvas has no notion of what it contains. It's nothing but a two-dimensional array of pixels and provides no further distinctions than that. If you want to know if and when the mouse hovers over a "shape" in the Canvas you'll have to keep track of

Canvas: hover over text output

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Java网络编程：实现QQ邮件发送客户端

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目录一、目标介绍 1、认识SMTP（邮件传输协议） 2、POP3（邮件接收协议）二、基于Base64编码邮箱及授权码 1、开通QQ邮箱SMTP/POP3服务 2、Java编写BASE64编码程序三、telnet命令发送邮件四、Java图形界面进行SMTP交互发邮件 1、编写客户端类 2、创建QQ邮件发送图形界面五、总结及下篇预告一、目标介绍这篇博文记录学习使用Java实现类似QQ发送邮件的客户端，打算分为上下两篇完成，上篇从零开始学习，认识计算机网络邮件传输协议（SMTP、POP3），并开通QQ邮箱的smtp/pop3服务，为之后程序设计做准备，自行实现简单的Java GUI，通过命令方式发送邮件；下篇基于前面的基础，实现基本完整功能的，类似我们平时QQ邮件发送的客户端，图形化界面简便了发送操作，另外增加了接收服务器反馈信息的功能，以后就可以使用自己写的邮件发送程序给其他人发邮件啦，更快更方便๑乛◡乛๑ 1、认识SMTP（邮件传输协议） SMTP（简单邮件传输协议，RFC821）是一种提供可靠且有效的电子邮件传输协议。SMTP是建立在FTP文件传输服务上的一种邮件服务，主要用于系统之间的邮件信息传递，并提供有关来信的通知。 2、POP3（邮件接收协议） POP3，全名为Post Office Protocol - Version 3，即邮局协议版本3