下面列出了java.awt.print.PrinterGraphics#java.awt.PrintGraphics 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
static boolean isPrinting(Graphics g) {
return (g instanceof PrinterGraphics || g instanceof PrintGraphics);
}
private static boolean isPrinting(Graphics g) {
return g instanceof PrintGraphics || g instanceof PrinterGraphics;
}