blocks|key|524794|text|FAQ实际上说的是，JFreeChart不支持硬实时绘图，这意味着图表不会在新数据到达或之后的确定时间间隔内更新。但是，我发现JFreeChart可以用于您所描述的应用程序的类型。您可以实现每秒1次更新，这是很好的。我不认为人眼能比这更快地追踪到一些东西。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|524795|如果您想要的不仅仅是这个，我怀疑您将在Java+(甚至是在另一种语言中)中找到任何东西。我们使用的操作系统不是设计成实时的。你不能保证他们会在事件发生后的最短时间内做出反应。与硬件驱动程序的紧密集成将需要每秒显示超过1-10帧。|524796|然而，如果您正确地设计您的应用程序，操作系统将快速响应，并且您的应用程序可以很容易地显示一个“实时”图(意为每秒更新一次的图形)。只是不要在紧急情况下使用你的应用程序关闭阀门！|524797|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

What the FAQ actually says is that JFreeChart doesn't support hard real-time charting, meaning that the chart isn't updated when new data arrives or at deterministic interval after it. However I have found that JFreeChart can be used for the kind of applications you are describing. You can achieve 1 update per second, which is fine. I don't think a human eye can follow something quicker than this.

If you want something more than this, I doubt you will find anything in Java (or even in another language). Operating Systems that we use aren't designed to be real time. You can't have a guaranty that they will respond in a minimum interval after an event. A tight integration with the hardware driver will be needed to show more than 1-10 frames per second.

However, if you design your application correctly, the OS will do respond quickly and your application can easily display a "real-time" graph (meaning a graph that updates once a second). Just don't use your application to shut down a valve in an emergency situation!

blocks|key|2056309|text|http://www.live-graph.org/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2056310|entityMap|0|LINK|mutability|MUTABLE|url^0|0|Q|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@$A|L|B|M|1|N]]|C|$]]|$1|D|3|-4|5|6|7|O|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|4]]]]

<a href="http://www.live-graph.org/" rel="noreferrer">http://www.live-graph.org/</a>

blocks|key|524995|text|只是偶然发现了一个关于如何使用可视化图表库的描述。看上去很漂亮！|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|524996|entityMap|0|LINK|mutability|MUTABLE|url|http://java.dzone.com/news/real-time-charts-java-desktop^0|F|6|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Just stumbled upon a description on how to use the <a href="http://java.dzone.com/news/real-time-charts-java-desktop" rel="noreferrer">visualvm charting library</a>. Looks very nice!

blocks|key|796914|text|看看正在处理中+--这是一个开放源码、基于java的环境，专为各种动画可视化设计。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|796915|entityMap|0|LINK|mutability|MUTABLE|url|http://processing.org/^0|2|5|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

have a look at <a href="http://processing.org/" rel="noreferrer">processing</a> -- it's an open-source, java-based environment designed for all sorts of animated visualizations.

blocks|key|2056398|text|好吧，如果它必须是Java，那么您可能需要研究这些。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2056399|Java实时系统+(包括实时和非实时演示，以及图表应用程序的JavaFX版本)|unordered-list-item|offset|length|2056400|使用多核系统的实时Java应用程序开发|2056401|快速实时任务图+(这种技术运行在Linux上，但是可以在任何支持Java5.0和Eclipse的平台上进行开发)。|2056402|JavaFX+-派图演示|2056403|entityMap|0|LINK|mutability|MUTABLE|url|http://www.devx.com/Java/Article/35246/1954|1|http://www.javaworld.com/javaworld/jw-04-2008/jw-04-realtime.html?page=3|2|http://www.alphaworks.ibm.com/tech/xrtgs?open&S_TACT=105AGX59&S_CMP=GRsite-jw64&ca=dgr-jw64awxrtgs|3|http://learnjavafx.typepad.com/weblog/2009/01/javafx-pie-chart-in-jfxtras-project-thanks-ben-jones.html^0|0|0|8|0|0|0|J|1|0|0|7|2|0|0|C|3|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@$E|12|F|13|1|14]]|A|$]]|$1|G|3|H|5|D|7|15|8|@]|9|@$E|16|F|17|1|18]]|A|$]]|$1|I|3|J|5|D|7|19|8|@]|9|@$E|1A|F|1B|1|1C]]|A|$]]|$1|K|3|L|5|D|7|1D|8|@]|9|@$E|1E|F|1F|1|1G]]|A|$]]|$1|M|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]|W|$5|P|Q|R|A|$S|X]]|Y|$5|P|Q|R|A|$S|Z]]]]

Well, if it has to be Java, then you might want to look into these.

<ul>
<li><a href="http://www.devx.com/Java/Article/35246/1954" rel="noreferrer">Java Real-Time Systems</a> (includes demo both real-time and non-real-timem, and JavaFX version of the charting application)</li>
<li><a href="http://www.javaworld.com/javaworld/jw-04-2008/jw-04-realtime.html?page=3" rel="noreferrer">Real-time Java application development using multicore systems</a></li>
<li><a href="http://www.alphaworks.ibm.com/tech/xrtgs?open&amp;S_TACT=105AGX59&amp;S_CMP=GRsite-jw64&amp;ca=dgr-jw64awxrtgs" rel="noreferrer">Expedited Real-Time Task Graphs</a> (This technology runs on Linux, but development can be done on any platform that supports Java 5.0 and Eclipse.)</li>
<li><a href="http://learnjavafx.typepad.com/weblog/2009/01/javafx-pie-chart-in-jfxtras-project-thanks-ben-jones.html" rel="noreferrer">JavaFX - A Pie Chart Demo</a></li>
</ul>

blocks|key|2056459|text|您可能已经找到了一个很好的解决方案，但如果不是，我最近做了一些工作，用于生成二维图表，允许以每秒50次以上的速度进行实时更新。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2056460|最初的目的是模仿网页滚动区域中图表记录器的出现，但我相信这种方法有更广泛的应用。|2056461|如果有人感兴趣，可以在图表记录仪演示找到一个演示。|offset|length|2056462|外观由模板(www.journeylog.co.uk/chart/templates/chartRecorder.xml).定义。一个特性是能够使用ExplorerCanvas在服务器或浏览器上指定绘图。|2056463|如果有人感兴趣，我可以为它启动一个开源项目。|2056464|entityMap|0|LINK|mutability|MUTABLE|url|http://www.journeylog.co.uk/chartRecorder^0|0|0|B|7|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@$F|W|G|X|1|Y]]|A|$]]|$1|H|3|I|5|6|7|Z|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|10|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]]]

You probably have already found a good solution, but if not, I have recently done some work on a framework for producing 2D charts allowing for live updates at a rate of over 50 changes per second.

The original intention was to mimic the appearance of a chart recorder in a scrolling region of a web page, but I believe the approach has wider application.

A demo can be found at <a href="http://www.journeylog.co.uk/chartRecorder" rel="noreferrer">Chart Recorder Demo</a> if anyone is interested.

The appearance is defined by a template (www.journeylog.co.uk/chart/templates/chartRecorder.xml). One feature is the ability to specify drawing either on the server or in the browser using ExplorerCanvas.

If anyone is interested I could start an open source project for it.

blocks|key|525020|text|这似乎是个不错的候选人。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|525021|http://jchart2d.sourceforge.net/|offset|length|525022|演示：|525023|http://jchart2d.sourceforge.net/applet.shtml|525024|entityMap|0|LINK|mutability|MUTABLE|url|1^0|0|0|W|0|0|0|0|18|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|J|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|C]]|Q|$5|M|N|O|A|$P|I]]]]

this seems like a good candidate.

<a href="http://jchart2d.sourceforge.net/" rel="nofollow">http://jchart2d.sourceforge.net/</a>

demo:

<a href="http://jchart2d.sourceforge.net/applet.shtml" rel="nofollow">http://jchart2d.sourceforge.net/applet.shtml</a>

blocks|key|2056547|text|JCCkit是各种各样的好库，内存较少，尤其是在嵌入式环境中：https://sourceforge.net/projects/jcckit。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2056548|所需时间小于100+kb。|2056549|entityMap|0|LINK|mutability|MUTABLE|url|https://sourceforge.net/projects/jcckit^0|V|13|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

JCCkit is vary good library who are targetting less memory especially in embedded environment : <a href="https://sourceforge.net/projects/jcckit" rel="nofollow">https://sourceforge.net/projects/jcckit</a> .

Takes less than &lt;100 kb .

blocks|key|524834|text|您可以为NetBeans挖掘源代码。分析器可以实时绘制各种事情，如内存使用情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|524835|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You could dig around the source for NetBeans. The profiler does real time graphing of various things such as memory usage.

blocks|key|2056539|text|SWT+XYGraph可以用您自己的数据提供程序绘制数据，因此您可以创建一个实时数据提供程序来提供实时数据。使用SWTChart和JFreeChart，您必须为其准备整个数组。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2056540|entityMap|0|LINK|mutability|MUTABLE|url|https://code.google.com/p/swt-xy-graph/^0|0|B|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="https://code.google.com/p/swt-xy-graph/" rel="nofollow">SWT XYGraph</a> can plot data with your own data provider, so you can create a real time data provider providing live data. With SWTChart and JFreeChart, you have to prepare the whole array for it.

blocks|key|525080|text|这个问题在以下文章中得到了很好的回答：Java实时图形绘制|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|525081|由于VisualVM包含一个图表API，并且这个API包含在JDK中，所以您可以使用一个良好/快速的图表API。|525082|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/7551673/java-real-time-graph-plotting^0|J|A|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

This question has been answered well in:
<a href="https://stackoverflow.com/questions/7551673/java-real-time-graph-plotting">Java Real time graph plotting</a>

As VisualVM includes a Charting API, and this API is included in the JDK, you have a good/fast charting API available.

There was an earlier thread on <a href="https://stackoverflow.com/questions/527640/java-graph-or-chart-library">Java graph or chart library</a>, where JFreeChart was found to be quite good, but, as <a href="http://www.jfree.org/jfreechart/faq.html#FAQ5" rel="nofollow noreferrer">stated in its FAQ</a>, it's not meant for real-time rendering.

Can anyone recommend a comparable library that supports real-time rendering? Just some basic xy-rendering - for instance, getting a voltage signal from data acquisition system and plotting it as it comes (time on x-axis, voltage on y-axis).

Real-time Java graph / chart library?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在上有一个早期的线程，其中JFreeChart被发现很好，但是，作为，它不是用于实时渲染的。有人能推荐一个支持实时渲染的类似库吗？只是一些基本的xy渲染-例如，从数据采集系统获取一个电压信号并绘制它的到来(x轴上的时间，y轴上的电压)。

问实时Java图形/图表库？
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