How to count lines of Java code using IntelliJ IDEA?

Question

How to count lines of Java code using IntelliJ IDEA?

• koppor: For repository statistics, you can use Gitinspector. Source: stackoverflow.com/q/1828874/873282

Answer 1

The Statistic plugin worked for me.

To install it from Intellij:

File - Settings - Plugins - Browse repositories... Find it on the list and double-click on it.

Access the 'statistic' toolbar via tabs in bottom left of project screen capture of statistic toolbar, bottom left

OLDER VERSIONS: Open statistics window from:

View -> Tool Windows -> Statistic

• RenniePet: The Statistic plugin works with IntelliJ IDEA 12, and even shows counts and percentages for comment lines and blank lines vs. total lines. Could use a bit more documentation. Launch it via new button that is installed in lower left corner of IntelliJ IDEA window. It has additional settings: File - Settings - (Project Settings) Statistic.
• Jade: The Statistic plugin provides file counts in addition to line counts. I was unable to find file counts with the Metrics Reloaded plug-in.
• barfuin: Works on IDEA 2017年2月5日, project > 150 kLOC, but does not group counts, no per module / per source folder sums --> mostly useless :-/
• Yngvar Kristiansen: This plugin doesn't work at all in 2018.1. The View -> Tool windows -> Stastistic just shows an empty window.
• Alexandru Tomuta: @YngvarKristiansen You have to do an initial refresh (top left corner)

Answer 2

Quick and dirty way is to do a global search for '\n'. You can filter it any way you like on file extensions etc.

Ctrl-Shift-F -> Text to find = '\n' -> Find.

Edit: And 'regular expression' has to be checked.

• somid3: Yes, but this also searches through all the files that are in your libraries (ie: if you are creating a web application it looks through all the lines of JQuery for example)
• Marcel Stör: Neat idea but only if you either trim all empty lines first or explicitly want them to be counted.
• algorhythm: @MarcelStör Try it with "(.+)\n"
• Buttons840: Searching for regex ".+" works better. It wont miss the last line in the file if it's missing a trailing newline like "\n" or ".+\n" will. It also semantically matches what your searching for better, that is, lines with characters.
• Qbyte: I cannot see the number of lines. It says "100+ matches in 3+ files" which isn't very helpful. I use IntelliJ IDEA Community 2019.2

Answer 3

In the past I have used the excellently named MetricsReloaded plugin to get this information.

You can install it from the JetBrains repository.

Once installed, access via: Analyze -> Calculate Metrics...

• Jeremy Brooks: Agreed, documentation is needed. How does one activate the plugin once it is installed?
• Jeremy Brooks: To answer my own question: Analyize -> Calculate Metrics
• RenniePet: Doesn't work with IntelliJ IDEA 12: github.com/BasLeijdekkers/MetricsReloaded/issues/19
• sjakubowski: Works in IDEA 12 now, not found in the repository you need to install via manually downloading.
• Remigius Stalder: As of 2021.2, it works just fine.

Answer 4

Although it is not an IntelliJ option, you could use a simple Bash command (if your operating system is Linux/Unix). Go to your source directory and type:

find . -type f -name '*.java' | xargs cat | wc -l

• cdmckay: I would do find . -type f -name '*.java' | xargs cat | wc -l (quoting the *.java part). Otherwise, the shell environment might expand the *.java too early and the command won't work properly.
• BullyWiiPlaza: This will return too many lines. Empty lines should not be counted
• SimpleSam5: ignore blank lines: find . -type f -name '*.java' | xargs cat | grep -ve '^\s*$' | wc -l
• Andrey Kotov: this also works in Windows with 'git bash' installed
• codeaperature: I bet the script could be modified to only count the files managed by source control.

Answer 5

Just like Neil said:

Ctrl-Shift-F -> Text to find = '\n' -> Find.

With only one improvement, if you enter "\n+", you can search for non-empty lines

If lines with only whitespace can be considered empty too, then you can use the regex "(\s*\n\s*)+" to not count them.

• Ondra Žižka: This is really slow, use only if there's no better way. I recommend installing GitBash and using the find.

Answer 6

Statistic plugins works fine!

Here is a quick case:

1. Ctrl+Shift+A and serach for "Statistic" to open the panel.
2. You will see panel as the screenshot and then click Refresh for whole project or select your project or file and Refresh on selection for only selection.

statistic

Answer 7

now 2 versions of metricsreloaded available. One supported on v9 and v10 isavailable here http://plugins.intellij.net/plugin/?idea&id=93

• RenniePet: Doesn't work with IntelliJ IDEA 12: github.com/BasLeijdekkers/MetricsReloaded/issues/19

Answer 8

You can to use Count Lines of Code (CLOC)

On Settings -> External Tools add a new tool

• Name: Count Lines of Code
• Group: Statistics
• Program: path/to/cloc
• Parameters: $ProjectFileDir$ or $FileParentDir$

Answer 9

To find all including empty lines of code try @Neil's solution:

Open Find in Path (Ctrl+Shift+F)

Search for the following regular expression: \n'

For lines with at least one character use following expression:

(.+)\n

For lines with at least one word character or digit use following expression:

`(.*)([\w\d]+)(.*)\n`

Notice: But the last line of file is just counted if you have a line break after it.