Common Java Errors and How to Fix Them
Browse all documented Java errors with detailed explanations, root causes, and step-by-step fixes.
You cannot use a scrollable result set with a Statement object that has been set
This error occurs when you attempt to use a Statement object to scroll through a result set after it has been set to be …
Cannot execute query: No transaction is currently active
This error occurs when trying to execute a database query within a transaction, but the transaction has not been started…
Cannot find symbol: method 'getDeclaredMethods()' in interface 'Class'
This error occurs when the Java compiler is unable to find a method, field, or class that is being referenced in the cod…
java.lang.ClassCastException: com.example.User cannot be cast to com.example.Use
This error occurs when a Java application attempts to cast an object to a subclass of its actual class, resulting in a C…
Syntax error on token "int", @ expected after this token
This error occurs when the Java compiler encounters a syntax error in the code. In this case, the token "int" is not all…
Cannot execute statement; SQL syntax error: line 1, col 14: Unexpected token 'SE
This error occurs when the Java database driver encounters an unexpected SQL syntax while executing a query. It can be c…
Invalid data type: org.hibernate.HibernateException: No Dialect class marked wit
This error occurs when Hibernate, a popular Java ORM library, fails to find the correct dialect for a database. A dialec…
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