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:
   
![image](https://github.com/apache/netbeans/assets/77560508/622120e6-3d0f-41be-8885-09b653c1129d)
   
   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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