java - Apache POI - Negative color values -


i'm trying write code outputs color of cells in excel sheet, when calling method getfillbackgroundcolor, gives me 3 negative values. i'm wondering, there somehow related rgb numbers? code wrote:

cellstyle style = currentcell2.getcellstyle(); color color = style.getfillbackgroundcolorcolor(); if (color != null) {     byte[] clr = ((xssfcolor) color).getrgb();     system.out.print("( ");     (int k = 0; k<clr.length; k++) {         system.out.print(clr[k]+" ");     }      system.out.print(" )"); }

a picture of excel sheet

a byte signed in java. may unsigned value doing binary and 0xff:

... system.out.print((clr[k] & 0xff) + " "); ...

but if color color = style.getfillbackgroundcolorcolor(); one possible fill color out of two.

excel cells may have pattern filling , fillbackgroundcolorcolor color behind pattern , fillforegroundcolorcolor color of pattern. default filled cells have solid pattern , need fillforegroundcolorcolor because fillbackgroundcolorcolor covered pattern.

so believe need color color = style.getfillforegroundcolorcolor();.


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