DongChunHao opened a new issue, #7292:
URL: https://github.com/apache/netbeans/issues/7292
### Apache NetBeans version
Apache NetBeans 21
### What happened
When I select "5" and perform the extract local variable refactoring, the
new method name is "localVar" and I click "OK", a syntax compilation error
occurs:
public class ExtractVariableTest {
public void method(int localVar) {
// extract variable: 5, rename "localVar"
System.out.println(5);
}
}
after refactoring result:

Due to not checking for conflicts between new names and parameter names in
the context, syntax errors occurred.
Expected result: When extracting local variables, for new names, the context
should be checked for naming conflicts, and if so, error prompts or warnings
should be provided.
### Language / Project Type / NetBeans Component
_No response_
### How to reproduce
Perform the following actions on the following code:
selecet “5”
click “Refactor-Introduce-variable”
new name "localVar"
click “ok”
public class ExtractVariableTest {
public void method(int localVar) {
// extract variable: 5, rename "localVar"
System.out.println(5);
}
}
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Windows11
### JDK
20
### Apache NetBeans packaging
Apache NetBeans platform
### Anything else
_No response_
### Are you willing to submit a pull request?
No
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