How do you remove blank lines in Java?

Implementing the Iterable Interface

How do I remove blank lines from a string?

Replace(subjectString, @”^s+$[rn]*”, string. Empty, RegexOptions. Multiline); ^s+$ will remove everything from the first blank line to the last (in a contiguous block of empty lines), including lines that only contain tabs or spaces.

How do you delete a line in Java?

You want to do something like the following:

  1. Open the old file for reading.
  2. Open a new (temporary) file for writing.
  3. Iterate over the lines in the old file (probably using a BufferedReader) …
  4. When done, close both files.
  5. Delete the old file.
  6. Rename the temporary file to the name of the original file.

How do I remove blank lines in Unix?

Simple solution is by using grep (GNU or BSD) command as below.

  1. Remove blank lines (not including lines with spaces). grep . file.txt.
  2. Remove completely blank lines (including lines with spaces). grep “S” file.txt.

How do you replace a line break in Java?

Line break (“n”) is a single character, to replace all line breaks from strings replace() function can be used. String replace(): returns a new String object that contains the same sequence of characters as the original string, but with a given character replaced by another given character.

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What is the difference between flush and close in Java?

flush() writes the content of the buffer to the destination and makes the buffer empty for further data to store but it does not closes the stream permanently. That means you can still write some more data to the stream. But close() closes the stream permanently.

How do I remove blank lines in grep?

‘^$’ means that there isn’t any character between ^(Start of line) and $(end of line). ‘^’ and ‘$’ are regex characters. So the command grep -v will print all the lines that do not match this pattern (No characters between ^ and $). This way, empty blank lines are eliminated.

How do I remove blank lines in notepad?

Once the document is loaded, select Edit > Line Operations > Remove Empty Lines. Voilà, every single blank lines has been deleted.

How do you remove blank lines in sed?

The d command in sed can be used to delete the empty lines in a file. Here the ^ specifies the start of the line and $ specifies the end of the line. You can redirect the output of above command and write it into a new file.

How can I delete multiple lines in Word?

Click the line, connector, or shape that you want to delete, and then press Delete. Tip: If you want to delete multiple lines or connectors, select the first line, press and hold Ctrl while you select the other lines, and then press Delete.

How do I delete blank lines in Word?

Delete a row, column, or cell from a table

  1. Right-click in a table cell, row, or column you want to delete.
  2. On the Mini toolbar, click Delete.
  3. Choose Delete Cells, Delete Columns, or Delete Rows.
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How do you remove blank lines in mail merge?

Press Alt+F9 if necessary to change from field codes to field results. Both the preview and the final merge should suppress the blank lines.