在RHEL中获取不正确的LineMetrics（java.awt.font.LineMetrics）

在RHEL中运行时，我得到了不正确的LineMetrics（java.awt.font.LineMetrics）值（上升-240、下降240和前导240），但在Windows中运行时得到了正确的值（上升10.053711、下降2.1972656和前导0.32714844）

JDK版本：jdk1.8.0_51

OS:RHEL，fedora 7.3//此处获取的值不正确

BufferedImage image = new BufferedImage(700, 500, BufferedImage.TYPE_INT_ARGB); 
Graphics2D g2 = image.createGraphics(); 
Font font = new Font("SansSerif",Font.PLAIN, 10); 
LineMetrics metrics = font.getLineMetrics("ABCxyz", g2.getFontRenderContext()); 
System.out.println("Metrics: "); 
System.out.println("\tAscent: " + metrics.getAscent()); 
System.out.println("\tDescent: " + metrics.getDescent()); 
System.out.println("\tHeight: " + metrics.getHeight()); 
System.out.println("\tLeading: " + metrics.getLeading());

OS:Windows 10//在此处获取正确的值

BufferedImage image = new BufferedImage(700, 500, BufferedImage.TYPE_INT_ARGB); 
Graphics2D g2 = image.createGraphics(); 
Font font = new Font("SansSerif",Font.PLAIN, 10); 
LineMetrics metrics = font.getLineMetrics("ABCxyz", g2.getFontRenderContext()); 
System.out.println("Metrics: "); 
System.out.println("\tAscent: " + metrics.getAscent()); 
System.out.println("\tDescent: " + metrics.getDescent()); 
System.out.println("\tHeight: " + metrics.getHeight()); 
System.out.println("\tLeading: " + metrics.getLeading());

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基础操作系统中安装的ttf文件已损坏，因为我获取的度量值不正确。

BuffereImage=new BuffereImage（700500，BuffereImage.TYPE_INT_ARGB）；Graphics2D g2=image.createGraphics（）；Font Font=新字体（“SansSerif”，Font.PLAIN，10）；LineMetrics=font.getLineMetrics（“ABCxyz”，g2.getFontRenderContext（））；System.out.println（“度量：”）；System.out.println（“\tAscent:+metrics.getAscent（））；System.out.println（“\tDescent:+metrics.getDescent（））；System.out.println（“\tHeight:+metrics.getHeight（））；System.out.println（“\tLeading:+metrics.getLeading（））；