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How to use IntelliJ IDEA to find all unused code?

Tags:

java

intellij-idea

code-metrics

refactoring

code-inspection

When I am in a .java file the unused code is usually grayed out or has a green underline saying this code will probably (probably because of some weird JNI/Reflection corner cases) be unused. But I have this project with thousands of Java files and I want to find ALL INSTANCES of such probable-unused codes. How can I do that in IntelliJ IDEA?

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pathikrit Avatar asked Jul 05 '11 19:07

pathikrit

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How do I see unused files in IntelliJ?

Just use Analyze | Inspect Code with appropriate inspection enabled (Unused declaration under Declaration redundancy group). @CrazyCoder This shows unused fields and methods too, any way to show only unused classes? My 2 cents: on IntelliJ 2016.3. 4 the option is under Analyze > Run Inspection By Name.

How do I delete unused variables in IntelliJ?

In IntelliJ, in a . java file, some unused code is greyed out indicating that the declared variable or function is never used. Unused imports are removed using Ctrl+Alt+O.

1 Answers

Just use Analyze | Inspect Code with appropriate inspection enabled (Unused declaration under Declaration redundancy group).

Using IntelliJ 11 CE you can now "Analyze | Run Inspection by Name ... | Unused declaration"

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CrazyCoder Avatar answered Oct 08 '22 06:10

CrazyCoder
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