Vous aurez besoin d'un conditional formatting.
A partir de ce document:
// Define a Conditional Formatting rule, which triggers formatting
// when cell's value is greater or equal than 100.0 and
// applies patternFormatting defined below.
HSSFConditionalFormattingRule rule = sheet.createConditionalFormattingRule(
ComparisonOperator.GE,
"100.0", // 1st formula
null // 2nd formula is not used for comparison operator GE
);
// Create pattern with red background
HSSFPatternFormatting patternFmt = rule.cretePatternFormatting();
patternFormatting.setFillBackgroundColor(HSSFColor.RED.index);
// Define a region containing first column
Region [] regions =
{
new Region(1,(short)1,-1,(short)1)
};
// Apply Conditional Formatting rule defined above to the regions
sheet.addConditionalFormatting(regions, rule);
qui crée une cellule avec un fond rouge pour les valeurs> = 100. Ce qui est presque ce que vous voulez :-)