Java(16777218): {0} cannot be resolved to a type.

[testforstephen]

This issue was created to collect use cases that may cause the compilation error "x cannot be resolved to a type". If you encouter such an error, pls feel free to comment below.

[testforstephen]

A use case from #685 (comment)

[CsCherrYY]

for code generation project: https://github.com/Netflix/conductor.git, for the generated types, we can see many 16777218 errors

[CsCherrYY]

besides, for the import declaration, there are many 268435846 errors

[Richardmogou]

I have this problem using vscode

[github-actions]

Hi @testforstephen, I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

Possible ways to resolve “x cannot be resolved to a type” (Java 16777218):

• Clean/refresh your workspace
  • Run Clean the workspace directory as described in the VS Code Java troubleshooting guide
  https://github.com/redhat-developer/vscode-java/wiki/Troubleshooting#clean-the-workspace-directory
• Verify your classpath/source setup
  • Make sure the missing type is in a source folder or on the project’s classpath
  • If you see “Unbound classpath container”, bind your JRE container correctly
  Java 10: The type java.lang.Object cannot be resolved redhat-developer/vscode-java#483
• If using Lombok (e.g. @builder, @NoArgsConstructor):
  • Add the Lombok jar as a dependency
  • Install the VS Code Lombok extension or enable annotation processing
  https://projectlombok.org/setup/eclipse
• Refresh/rebuild the project
  • For Maven: Maven > Update Project & Project > Clean

No existing issue exactly matches this “collector” thread.

Other references with low confidence

• #1875 “Code is underlined with message "cannot be resolved to a type" , but it’s not true” – intermittent underlining due to JDT LS indexing (NPE in logs)
  Code is underlined with message "cannot be resolved to a type" , but it's not true redhat-developer/vscode-java#1875
• eclipse-jdt.ls #3093 “Some package-private classes failed to be resolved until any dummy change made” – resolution fixed after editor change
  Some package-private classes failed to be resolved until any dummy change made eclipse-jdtls/eclipse.jdt.ls#3093

The team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!