Processing images in java

Clash Royale CLAN TAG#URR8PPPProcessing images in java
Which tools can I use to read ascii grids in java? http://docs.geotools.org/latest/userguide/library/coverage/arcgrid.html ArcGRidReader is one such option, however it depends on imageio and imageio-ext which can be really tricky to get set up & working correctly. Are there alternatives?
ArcGRidReader
imageio
imageio-ext
ncols 4
nrows 6
xllcorner 0.0
yllcorner 0.0
cellsize 50.0
NODATA_value -9999
-9999 -9999 5 2
-9999 20 100 36
3 8 35 10
32 42 50 6
88 75 27 9
13 5 1 -9999
NOTE: I need to obtain the GridCoverage2D somehow, as later on I want to execute a http://docs.geotools.org/latest/userguide/unsupported/process/process-raster.html polygon extraction process.
GridCoverage2D
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