饼图没有坐标轴，也不需要坐标轴 使用的系列是QPieSeries 饼图里面一个一个的块称为切片
When I try to use java.lang.System.console(), I get a null pointer. I can still write to out and read from in, but this only works when I run straight from my IDE. When I run the .jar file directly, n
加载中,请稍侯......