中的java.library.path

Question

下面的代碼沒有fontmanager工作就好了我的桌面上：

 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); 
     Graphics g = image.getGraphics(); 
     g.setFont(new Font("SansSerif", Font.BOLD, 18)); 

     Graphics2D graphics = (Graphics2D) g; 
     graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); 
     graphics.drawString(s, 5, 20); 

然而，當我運行（碼頭工人，容器內的OpenJDK Linux上運行高山）我的服務器上的代碼，它失敗，出現以下錯誤：

java.lang.UnsatisfiedLinkError: no fontmanager in java.library.path 
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867) 
at java.lang.Runtime.loadLibrary0(Runtime.java:870) 
at java.lang.System.loadLibrary(System.java:1122) 
at sun.font.FontManagerNativeLibrary$1.run(FontManagerNativeLibrary.java:61) 
at java.security.AccessController.doPrivileged(Native Method) 
at sun.font.FontManagerNativeLibrary.<clinit>(FontManagerNativeLibrary.java:32) 
at sun.font.SunFontManager$1.run(SunFontManager.java:339) 
at java.security.AccessController.doPrivileged(Native Method) 
at sun.font.SunFontManager.<clinit>(SunFontManager.java:335) 
at java.lang.Class.forName0(Native Method) 
at java.lang.Class.forName(Class.java:348) 
at sun.font.FontManagerFactory$1.run(FontManagerFactory.java:82) 
at java.security.AccessController.doPrivileged(Native Method) 
at sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:74) 
at java.awt.Font.getFont2D(Font.java:491) 
at java.awt.Font.access$000(Font.java:224) 
at java.awt.Font$FontAccessImpl.getFont2D(Font.java:228) 
at sun.font.FontUtilities.getFont2D(FontUtilities.java:180) 
at sun.java2d.SunGraphics2D.checkFontInfo(SunGraphics2D.java:669) 
at sun.java2d.SunGraphics2D.getFontInfo(SunGraphics2D.java:830) 
at sun.java2d.pipe.GlyphListPipe.drawString(GlyphListPipe.java:50) 
at sun.java2d.pipe.ValidatePipe.drawString(ValidatePipe.java:165) 
at sun.java2d.SunGraphics2D.drawString(SunGraphics2D.java:2928) 

Java的版本（我的服務器上）給出：

openjdk version "1.8.0_77-internal" 
OpenJDK Runtime Environment (build 1.8.0_77-internal-alpine-r0-b03) 
OpenJDK 64-Bit Server VM (build 25.77-b03, mixed mode) 

我搜索˚F或awt庫，他們可以在這裏找到：

/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/libawt_headless.so 
/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/libawt.so 

Answer 1

我跑到這個完全相同的問題運行Alpine Linux 3.4。我遵循的方向在this github issue解決了這個問題：

1. GUI支持安裝JRE，即openjdk8-jre代替openjdk8-jre-head
2. 安裝fontconfig和ttf-dejavu包

我Dockerfile運行行看起來像：

RUN apk add openjdk8-jre fontconfig ttf-dejavu 

在此之後，JDK是一個無法自動加載默認字體，並且異常消失。