如何在Java中查找某个字体是否正确安装在机器上 [英] How to find, with Java, if a certain font is installed correctly on a machine

问题描述

我有一台运行Win Vista的PC笔记本电脑，当我第一次购买时，某些中文字体不会显示出来，我只能看到矩形，但是我玩了一段时间的控制设置，改变了一些属性，现在它显示正确的中文字体，但我不记得我做了什么。

现在我的一些程序显示英文和中文，如下所示：Enter |输入（这里的汉字也意味着进入），但是如果用户没有在他的机器上正确安装中文字体，他会看到这样的：Enter | [] []，我的问题是：在Java中如何检测这些字符是否会在某台机器上正确显示，如果没有，只显示Enter，如果是，则显示Enter |输入。

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解决方案> java.awt.GraphicsEnvironment.getAvailableFontFamilyNames（）可以给你一个当前系统上安装的可用字体列表。您也可以使用 java.awt.GraphicsEnvironment.getAllFonts（）来获取 java.awt.Font 对象。然后，可以使用 java.awt.Font.canDisplay（int）来检查是否可以显示一个Unicode字符在该字体中（ int 是多字节字符的整数表示形式）。

I have a PC notebook running Win Vista, when I first bought it, certain Chinese fonts won't show up, I could only see rectangles, but I played with the control setting for a while, changed some properties, and now it shows Chinese fonts correctly, but I don't remember what I did.

Now some of my programs displays both English and Chinese, something like this : "Enter | 输入" (The Chinese here also means enter), but if a user doesn't have Chinese fonts installed properly on his machine, he will see something like this : "Enter | [][]", my question is : in Java how to detect if those characters will show up correctly on a certain machine, if not, just display "Enter", if it is, show "Enter | 输入".

Frank

解决方案

java.awt.GraphicsEnvironment.getAvailableFontFamilyNames() can give you a list of the available fonts installed on the current system. You could also use java.awt.GraphicsEnvironment.getAllFonts() to get java.awt.Font objects.

Then, you can use java.awt.Font.canDisplay(int) to check whether a Unicode character can be displayed in that font (where the int is the integer representation of the multibyte character).

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