blocks|key|2366067|text|如果可以让gnuplot从命令行或标准输入(或从文件中读取)获取所有输入，并将其输出写入文件，那么使用ProcessBuilder应该没有问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2366068|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/javase/6/docs/api/java/lang/ProcessBuilder.html^0|1F|E|1F|E|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

If you can get gnuplot to take all input from the command line or standard input (or read it from a file) and write its output to files as well, then there should be no problem doing this using <a href="http://java.sun.com/javase/6/docs/api/java/lang/ProcessBuilder.html" rel="nofollow noreferrer"><code>ProcessBuilder</code></a>.

blocks|key|1447964|text|您可以使用"exec“命令启动任何外部应用程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1447965|http://java.sun.com/javase/6/docs/api/java/lang/Runtime.html|offset|length|1447966|请参阅此页面以获取一些示例。http://www.rgagnon.com/javadetails/java-0014.html|1447967|编辑:我忘记了ProcessBuilder。Michael+Borgwardt的答案是一个更强大的解决方案。|1447968|entityMap|0|LINK|mutability|MUTABLE|url|1|http://www.rgagnon.com/javadetails/java-0014.html^0|0|0|1O|0|0|E|1D|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@$D|U|E|V|1|W]]|A|$]]|$1|F|3|G|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|H|3|I|5|6|7|11|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|C]]|Q|$5|M|N|O|A|$P|R]]]]

You can launch any external application using the "exec" commands.

<a href="http://java.sun.com/javase/6/docs/api/java/lang/Runtime.html" rel="nofollow noreferrer">http://java.sun.com/javase/6/docs/api/java/lang/Runtime.html</a>

See this page for a few examples.
<a href="http://www.rgagnon.com/javadetails/java-0014.html" rel="nofollow noreferrer">http://www.rgagnon.com/javadetails/java-0014.html</a>

EDIT: I forgot about ProcessBuilder. Michael Borgwardt's answer is a more robust solution.

blocks|key|2366091|text|使用gnujavaplot。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2366092|entityMap|0|LINK|mutability|MUTABLE|url|http://gnujavaplot.sourceforge.net/JavaPlot/About.html^0|2|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]]]]

Use <a href="http://gnujavaplot.sourceforge.net/JavaPlot/About.html" rel="noreferrer">gnujavaplot</a>.

blocks|key|2366103|text|这在Debian上有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2366104|String[]+s+=+{"/usr/bin/gnuplot",
++++++++++++++"-e",
++++++++++++++"set+term+jpeg+large+size+800,600;set+autoscale;+set+grid;set+format+y+\"%250.f\";set+output+\"plot.jpg\";set+xdata+time;set+timefmt+\"%25Y-%25m-%25d-%25H:%25M:%25S\";set+xlabel+\"Dates\";set+ylabel+\"Data+transferred+(bytes)\";plot+\""%2Bx%2B"\"+using+1:2+title+\"Total:"%2Btot%2B"\"+with+linespoints;"
+++++++++++++};
try+{
++++Runtime+rt+=+Runtime.getRuntime();
++++Process+proc+=+rt.exec(s);
++++InputStream+stdin+=+proc.getErrorStream();
++++InputStreamReader+isr+=+new+InputStreamReader(stdin);
++++BufferedReader+br+=+new+BufferedReader(isr);
++++String+line+=+null;
++++while+((line+=+br.readLine())+!=+null)
++++++++System.err.println("gnuplot:"%2Bline);
++++int+exitVal+=+proc.waitFor();
++++if+(exitVal+!=+0)
++++++++log("gnuplot+Process+exitValue:+"+%2B+exitVal);
++++proc.getInputStream().close();
++++proc.getOutputStream().close();
++++proc.getErrorStream().close();
}+catch+(Exception+e)+{
++++System.err.println("Fail:+"+%2B+e);
}|code-block|syntax|javascript|2366105|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This works on Debian:

<pre><code>String[] s = {"/usr/bin/gnuplot",
 "-e",
 "set term jpeg large size 800,600;set autoscale; set grid;set format y \"%0.f\";set output \"plot.jpg\";set xdata time;set timefmt \"%Y-%m-%d-%H:%M:%S\";set xlabel \"Dates\";set ylabel \"Data transferred (bytes)\";plot \""+x+"\" using 1:2 title \"Total:"+tot+"\" with linespoints;"
 };
try {
 Runtime rt = Runtime.getRuntime();
 Process proc = rt.exec(s);
 InputStream stdin = proc.getErrorStream();
 InputStreamReader isr = new InputStreamReader(stdin);
 BufferedReader br = new BufferedReader(isr);
 String line = null;
 while ((line = br.readLine()) != null)
 System.err.println("gnuplot:"+line);
 int exitVal = proc.waitFor();
 if (exitVal != 0)
 log("gnuplot Process exitValue: " + exitVal);
 proc.getInputStream().close();
 proc.getOutputStream().close();
 proc.getErrorStream().close();
} catch (Exception e) {
 System.err.println("Fail: " + e);
}
</code></pre>

blocks|key|1448000|text|使用JavaGnuplotHybrid库。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1448001|它非常轻量级(只有3个核心类)，并且支持Java和Gnuplot的混合编程。|1448002|1448003|使用Java和Gnuplot的混合编程|ordered-list-item|1448004|非常轻量级(只有三个核心类)|1448005|使用Gnuplot代码中的标签来执行函数或获取Java中的字段值。|1448006|支持在Java中同步和异步运行Gnuplot。(同步:您的java程序将等待，直到您关闭弹出的Gnuplot窗口；异步:您的java程序不会等待。)从xml+files|1448007|Support+|1448008|代码模板到java+terminal|1448009|Read+Gnuplot代码模板中捕获Gnuplot的|1448010|错误/正常文本输出。|1448011|1448012|有关更多详细信息，请参阅：|1448013|https://github.com/mleoking/JavaGnuplotHybrid|offset|length|1448014|Examples：https://github.com/mleoking/JavaGnuplotHybrid/blob/master/javagnuplothybrid/doc/examples.md|unordered-list-item|1448015|
+|1448016|项目页面|1448017|1448018|entityMap|0|LINK|mutability|MUTABLE|url|1|https://github.com/mleoking/JavaGnuplotHybrid/blob/master/javagnuplothybrid/doc/examples.md^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|19|0|0|9|2J|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1K|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|1M|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|1N|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|1O|8|@]|9|@]|A|$]]|$1|L|3|M|5|G|7|1P|8|@]|9|@]|A|$]]|$1|N|3|O|5|G|7|1Q|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1R|8|@]|9|@]|A|$]]|$1|R|3|S|5|G|7|1S|8|@]|9|@]|A|$]]|$1|T|3|U|5|G|7|1T|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1U|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1V|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1W|8|@]|9|@$10|1X|11|1Y|1|1Z]]|A|$]]|$1|12|3|13|5|14|7|20|8|@]|9|@$10|21|11|22|1|23]]|A|$]]|$1|15|3|16|5|6|7|24|8|@]|9|@]|A|$]]|$1|17|3|18|5|G|7|25|8|@]|9|@]|A|$]]|$1|19|3|-4|5|6|7|26|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|27|8|@]|9|@]|A|$]]]|1B|$1C|$5|1D|1E|1F|A|$1G|Z]]|1H|$5|1D|1E|1F|A|$1G|1I]]]]

Use the JavaGnuplotHybrid library.

It is very light weight (only 3 core classes) and enables hybrid programming with Java and Gnuplot.

<ol>
<li>Hybrid programming with Java and Gnuplot</li>
<li>Very light weight (just three core Classes)</li>
<li>Use tags in Gnuplot code to execute functions or get fields' values
in Java.</li>
<li>Support both synchronized and asynchronized running of Gnuplot in
Java. (synchronized: your java program will wait until you close the
popped Gnuplot window; asynchronized: you java program will not
wait.)</li>
<li>Capture error/normal text output of Gnuplot to the java terminal</li>
<li>Read Gnuplot code from xml files</li>
<li>Support Gnuplot code template.</li>
</ol>

For more details: 

<ol>
<li>Project page: <a href="https://github.com/mleoking/JavaGnuplotHybrid" rel="nofollow">https://github.com/mleoking/JavaGnuplotHybrid</a></li>
<li>Examples: <a href="https://github.com/mleoking/JavaGnuplotHybrid/blob/master/javagnuplothybrid/doc/examples.md" rel="nofollow">https://github.com/mleoking/JavaGnuplotHybrid/blob/master/javagnuplothybrid/doc/examples.md</a></li>
</ol>

I'm not sure if this is possible, especially since Java runs through a VM, but can I call gnuplot from within Java? Perhaps I could have Java open a terminal and input

<pre><code>gnuplot
plot ...
</code></pre>

etc?

Calling gnuplot from java? (ubuntu)

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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我不确定这是否可能，特别是因为Java通过VM运行，但是我可以从Java内部调用gnuplot吗？也许我可以让Java打开一个终端并输入gnuplotplot ...等?

问从java调用gnuplot？(ubuntu)
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