awt

How to serialize Java 2D Shape objects as XML?

由 ≡放荡痞女 提交于 2020-01-09 03:41:08
问题 The Shape interface is implemented by objects of Java 2D ( Arc2D , Area , CubicCurve2D , Ellipse2D , GeneralPath etc..). Some of the concrete objects are marked as Serializable and can be stored and restored using object serialization, but others like Area do not implement the interface and throw errors. But since we are constantly warned that such naive serialization is not necessarily stable across Java implementations or versions, I'd prefer to use some form of serialization that is. That

How to serialize Java 2D Shape objects as XML?

由 自古美人都是妖i 提交于 2020-01-09 03:40:12
问题 The Shape interface is implemented by objects of Java 2D ( Arc2D , Area , CubicCurve2D , Ellipse2D , GeneralPath etc..). Some of the concrete objects are marked as Serializable and can be stored and restored using object serialization, but others like Area do not implement the interface and throw errors. But since we are constantly warned that such naive serialization is not necessarily stable across Java implementations or versions, I'd prefer to use some form of serialization that is. That

How to get the Java Output screen?

由 醉酒当歌 提交于 2020-01-07 08:33:26
问题 I am trying to display images on the screen using Graphics but the screen doesn't load The output screen appears but only show The black screen and not the images The code gets compiled properly so why am i not getting the output package game; import java.awt.*; import javax.swing.JFrame; public class Screen { private GraphicsDevice vc; public Screen(){ GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment(); vc=env.getDefaultScreenDevice(); } public void setFullScreen

Reactor深度探索

由 时光毁灭记忆、已成空白 提交于 2020-01-07 03:51:39
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 技术点 反应器模式(Reactor) 同步非阻塞，每个事情可以分为几个步骤，每个步骤可以相应去做，每个步骤是不会相互影响的，但是做起来是串行的。有关Netty的具体实现，可以参考 Netty整理 Proactor模式 异步非阻塞，每个事情同时做，或者说是异步的去做， 观察者模式(Observer) JDK的实现可以参考 使用JDK的观察者接口进行消息推送 观察者模式是一个推的模式 迭代器模式(Iterator) 是一种拉的模式，数据准备好后，进行一个循环拉取。 Java并发模型 Reactive Reactive是一种编程方式，由不同的方式来实现 RxJava : Reactive Extensions Reactor : Spring WebFlux Reactive类库 Flow API : Java 9 Flow API实现 阻塞的弊端和并行的复杂 在Reactor官方的网站上，指出了现有编程的一些不足 https://projectreactor.io/docs/core/release/reference/index.html#_blocking_can_be_wasteful Reactor认为阻塞可能是浪费的 归纳 阻塞导致性能瓶颈和浪费资源 增加线程可能会引起资源竞争和并发问题(可见性问题

学了java以后，我才知道桌球还可以这么玩？

由 扶醉桌前 提交于 2020-01-06 23:04:25
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> java做桌 球小游戏 桌球是人们日常生活中都能接触到的一种娱乐活动，随着互联网技术的发展，手机上也有了很多桌球小游戏，让人们随时随地都能打两把。 今天分享一个用 java编写的 桌球小游戏 代码如下： import java.awt.*; import javax.swing.*; public class BallGame extends JFrame { Imageball=Toolkit. getDefaultToolkit ().getImage("Images/ball.png"); Imagedesk=Toolkit. getDefaultToolkit ().getImage("Images/desk.jpg"); double x=100; //小球的横坐标 double y=100; //小球的纵坐标 double degree= 3.14/3; //弧度， 此处表示60度 //画窗口的方法 public void paint(Graphics g){ System. out .println("窗口被画了一次！"); g.drawImage(desk,0,0, null ); g.drawImage(ball,( int )x,( int )y, null ); x=x+10*Math.

Determine height of screen in Java

由 孤人 提交于 2020-01-06 19:31:07
问题 I have my JFrame in full screen mode using the following: setExtendedState(JFrame.MAXIMIZED_BOTH); setUndecorated(true); And I want to know the height. Note that Toolkit.getDefaultToolkit().getScreenSize() does not work because I'm on a Mac and the real height should exclude the height of the Mac bar thing at the top of the screen. And in the case of Windows, for example, the height should exclude the start bar. Hence, I want to know the true height of the window space I have. 回答1: I use this

runtime error with KeyAdapter, awt, swing on java. help spot the error [closed]

由 我只是一个虾纸丫 提交于 2020-01-06 19:17:35
问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . hello im wrote some code i though it was going to work but it compiles and it doesnt even throws an exception or anything. it also

runtime error with KeyAdapter, awt, swing on java. help spot the error [closed]

由 半城伤御伤魂 提交于 2020-01-06 19:15:28
问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . hello im wrote some code i though it was going to work but it compiles and it doesnt even throws an exception or anything. it also

Best component in awt/swings to display the webpage and access it

由 这一生的挚爱 提交于 2020-01-06 16:23:35
问题 Which is the best component in awt/Swings to display the webpage and access the webpage in that component without any issues like (functioning of javascript, images in the page should display good, as viewing the page on browser and support as browser with all functionalities) here there is a tutorial about it displaying webpage but it says,we cannt assure JEditotPane will provide as browser. You can see in the last paragraph of that tutorial. I need to implement that, webpage to be displayed

JPopupMenu not showing on the screen?

由 不想你离开。 提交于 2020-01-06 14:03:00
问题 So for my school project I am creating a Class Diagram maker. I am 95% done with it and all I need is to make the Jpopup menu appear. In the core I have 3 files. The ApplicationModel which extends the JFrame, ClassDiagram which extends the JPanel and ClassModel which makes the Rectangles (in the picture) appear. The core of the rendering is on Rectangle objects and the text inside the middle and bottom rectangles are surrounded by another invisible rectangle, which is right-clickable. This is
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