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faq.md: remove obsolete entries, move relevant Java entries to PSI Cookbook

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Yann Cébron 2025-05-07 14:29:36 +02:00
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19
topics/basics/faq.md
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@ -11,25 +11,6 @@ See [](getting_help.topic#problems-with-code-support-issues) on how to post new
> See also [](explore_api.md) for more information and strategies.
>
## Accessing and Modifying the Source Code
> See also [](psi.md) and [](psi_cookbook.md)
* [How do I find all subclasses of a class?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206791895-finding-all-derived-class-given-parent-class)
* [How do I find all anonymous classes created in a class?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206792205-How-to-find-anonymous-classes-in-PsiClass-)
* [How do I calculate the value of a string literal token?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206139829-How-to-evaluate-the-value-of-PsiJavaToken-of-STRING-LITERAL-type)
* [How do I rename or move a Java class?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206791825-How-to-rename-a-class-)
* [How do I build the list of all classes used by a given class or package?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206139469-Using-DependencyValidationManager-to-Get-Required-Classes)
* [How do I insert whitespace into the PSI?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206143839-Adding-PsiElements-to-a-PsiFile)
* [How do I add properties to a .properties file?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206142279-Dynamically-add-new-properties-to-properties-files)
* [How do I find specific method calls inside a PsiMethod?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206143579-finding-a-statement-within-a-PsiMethod)
* [What is the lifecycle of a PSI element?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206796015-What-is-the-lifecycle-of-a-PsiElement-)
* [How do I create a new class in the given package?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206771665-Creating-a-new-class)
* [How do I make a PsiClass extend another PsiClass?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206794255-How-to-make-a-PsiClass-derive-from-another-one-)
* [How do I find references to a class from non-Java files?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206800695-How-to-obtain-the-references-to-a-class-from-non-java-files-)
* [How do I find the source file given the path to a .class file?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206800595-How-to-find-the-source-for-a-class-file)
* [How do I find classes with the specified non-qualified name?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206146759-How-to-resolve-unqualified-name-to-possible-PsiClasses-)
## Working with XML and XML DOM
* [How do I change the value of an XML attribute through the PSI?](https://intellij-support.jetbrains.com/hc/en-us/community/posts/206139639-Change-xml-attribute-value)

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topics/basics/psi_cookbook.md
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@ -69,7 +69,19 @@ or
[`OverridingMethodsSearch.search()`](%gh-ic%/java/java-indexing-api/src/com/intellij/psi/search/searches/OverridingMethodsSearch.java)
### How do I create a new class/interface/enum/record in a given directory?
Use methods from [`JavaDirectoryService`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/JavaDirectoryService.java).
### How can I locate specific Java PSI elements within a class/method?
Extend [`JavaElementVisitor`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/JavaElementVisitor.java)
or [`JavaRecursiveElementVisitor`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/JavaRecursiveElementVisitor.java) and override relevant method(s).
Pass it to `PsiElement.accept()` of the parent PSI element (for example, [`PsiClass`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/PsiClass.java)
or [`PsiMethod`](%gh-ic%/java/java-psi-api/src/com/intellij/psi/PsiMethod.java)).
### How do I check the presence of a JVM library?
<primary-label ref="2023.2"/>
Use dedicated (and heavily cached) methods from [`JavaLibraryUtil`](%gh-ic%/java/openapi/src/com/intellij/java/library/JavaLibraryUtil.java):