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in Java, suppose I have a text file with n rows, is it possible to only write and replace row x? or do I rewrite all the rows in order to edit any row?
It seems that I have use RandomAccess File to read x-1 lines, and then call
f.writeChars(str+"\n");
would this work? but also it won’t delete the existing xth line..
If you’re not changing the line length, you can simply overwrite the original data.
If you need to change the line length, or add (or remove) a row in the middle of the file, then you need to rewrite all the data starting from that point till the end.