我如何计算像素的字符串的宽度？ [英] How do I calculate the width of a string in pixels?

问题描述

如何在Java中以像素为单位计算 String 的宽度？例如，我有一个字符串说Hello World！。它的长度是多少，也是考虑它的字体系列和大小？ 解决方案

有很多方法例如...

  BufferedImage img = new BufferedImage （1，1，BufferedImage.TYPE_INT_ARGB）; 
 Graphics2D g2d = img.createGraphics（）; 
 FontMetrics fm = g2d.getFontMetrics（）; 
 System.out.println（fm.stringWidth（This is a simple test））; 
 g2d.dispose（）; 
  

但是这只对 BufferedImage 它是图形上下文，它不会翻译回来说，就像一个屏幕或打印机。

然而，只要你有一个 Graphics 上下文，就可以得到相同的结果。

这个例子显然使用为 Graphics 上下文安装的默认字体，如果您需要...

How to calculate width of a String in pixels in Java? For e.g., I have a string say "Hello World!". What is its length in pixels, also considering its font family and size?

解决方案

There are a number of ways to achieve what you want, based on what it is you want to achieve, for example...

BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
FontMetrics fm = g2d.getFontMetrics();
System.out.println(fm.stringWidth("This is a simple test"));
g2d.dispose();

But this only has relevence for the BufferedImage and it's Graphics context, it will not translate back to say, something like a screen or printer.

However, so long as you have a Graphics context, you can achieve the same result.

This example, obviously, uses the default font installed for the Graphics context, which you can change if you need to...

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