This example replaces the word "forReplace" matching case.
Range range = sheet.range("A1:B2"); range.setText("forreplace"); range = sheet.range("C1:D2"); range.setText("forReplace"); range = sheet.range("E1:F2"); range.setText("ForReplace"); range = sheet.range("A1:F2"); range.replace("forReplace","replaced",true);
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