适用于 Windows 的 Java 电池计量表
我想为我的计算机制作一个电池表，这些计算机都在不同的操作系统上运行。我认为最好的方法是使用 Java。有没有办法无需外部库来做到这一点？它所需要做的就是在 java.swing.JProgressBar 中显示电池电量。
I want to make a battery meter for my computers, which all work on different OSs. I figured the best way would be in Java. Is there any way to do this WITHOUT external libraries? All it needs to do is show the battery level in a java.swing.JProgressBar.
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不，仅使用标准 JDK 是无法做到这一点的。由操作系统来公开有关当前电源/电池状态的详细信息，并且 Java 中没有内置的方法来访问此信息。要做你想做的事至少需要一些外部库，几乎肯定还需要 JNI。
No, there is no way to do this just using the standard JDK. It is up to the OS to expose details about the current power/battery state, and there is no built-in way to access this information in Java. To do what you want will require at least some external libraries, and almost certainly JNI as well.
即使在操作系统内，电池电量也是一个非常低级别的测量，实际上是由硬件执行的。
至少，您必须使用外部库来完成此操作，但即使您这样做，由于两个操作系统处理电池的方式非常不同，您仍然很可能无法获得跨平台解决方案和硬件。
Even within the OS, the battery level is a very low-level measurement that is really carried out by the hardware.
At the very least, you would have to use external libraries to do it, but even if you do, there's a good chance that you still wouldn't have a cross-platform solution due to the very different ways batteries are handled by both OS and hardware.