Web Reference: Mar 11, 2025 · This tutorial explains the "method is undefined for the type" error in Java. Learn about its common causes and practical solutions, including checking method names, verifying object types, and ensuring proper inheritance. Learn how to fix the 'method undefined' error in Java, understand its causes, and explore best practices to prevent this issue. I'm importing a package from one web project into another. I instantiate the class and try to use one of its method, but I get a build error that the method is undefined. The method is public. All other methods work except this one. The project from which I'm importing is built properly.
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Last Updated: April 11, 2026
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