Is it possible to configure LT on my own editor (like notepad). Please suggest?
While using languagetool.jar (GUI) how can I post/get my file content on it?
How can filter all error other than “Possible spelling …”, “Possible typo…” while using english dictionary within “language-coomand.jar”? or How can I write new RULE ID: for above messages?
The fastest and (for many use cases) most hassle-free way is to do Ctrl+A and Ctrl+X in your editor, which cuts everything to the clipboard; then use Ctrl+V in the LanguageTool GUI; make your changes there; use Ctrl+A and Ctrl+X again; switch back to the editor and do Ctrl+V to paste your changed text back.
This may look complicated at first glance, but it is a straightforward and fast way once you get used to it. Please note that this will only work with plain text without formatting (like bold and italics etc.).