public static void main(String[] args)
{
Dimension screensize = Toolkit.getDefaultToolkit().getScreenSize();
int width = (int)screensize.getWidth();
int height = (int)screensize.getHeight();
System.out.println("宽度：" + width + " 高度:" + height);
}
原文：https://www.cnblogs.com/qq1445496485/p/15079214.html