我的JVM需要哪些软件包才能在我的应用程序中使用字体?我在Graphics2D中绘制文本,并在我的Java-Project中创建PDF文件。
解决方案Graphics2D和 java.awt。* 或 java.swing。* 包需要一个GUI来绘图。
这是大多数无头服务器的问题。您有两个选项,请按以下顺序尝试:
使用系统属性java.awt.headless并设置true java -Djava.awt.headless = true 或 System.setProperty(java.awt.headless true);
在服务器上安装XWindows虚拟帧缓冲区(xvfb)。这使得服务器无头,但提供了在虚拟屏幕上绘制所需的XWindows原语。它远未优化(无图形加速),但它将允许您的系统再次工作。
code> java.awt.headless 选项与Java 1.4一起引入。请参阅: java.sun/developer/technicalArticles/J2SE/桌面/无头/
如果不起作用,请安装XVFB包并进行配置,以创建足够大的虚拟框架缓冲区。
I want to run Tomcat on Debian 5 Minimal. So I don't need a gui for my OS, it's just a pure Tomcat-Server.
Which packages do I need for my JVM to use Fonts in my applications? Im drawing texts in Graphics2D and am creating PDF-Files in my Java-Project.
解决方案Graphics2D and anything in the java.awt.* or java.swing.* packages require a GUI to do its drawing.
This is a problem on most headless servers. You have two options, and try them in this order:
Use the system property "java.awt.headless" and set that to "true" java -Djava.awt.headless=true or System.setProperty("java.awt.headless", "true");
Install the XWindows Virtual Frame Buffer (xvfb) on your server. This keeps the server headless, but provides the XWindows primitives needed to draw on a virtual screen. It is far from optimized (no graphics acceleration), but it will allow your system to work again.
The java.awt.headless option was introduced with Java 1.4. See: java.sun/developer/technicalArticles/J2SE/Desktop/headless/
In the event that does not work, install the XVFB package and configure it to create a virtual frame buffer large enough to do your drawing.
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