Common Java Errors and How to Fix Them
Browse all documented Java errors with detailed explanations, root causes, and step-by-step fixes.
Cannot find symbol: variable 'name' in void main(String[] args)
This error occurs when the Java compiler is unable to find a declared variable or method. In this case, the variable 'na…
Cannot find symbol: class Scanner on line 5
This error occurs when Java cannot find a class, method, or variable that is being used in the code. It is often caused …
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating
This error occurs when Spring cannot find or autowire a required bean, often due to a missing or incorrect dependency co…
Bean 'userRepository' is not registered in the Spring BeanFactory
This error occurs when a Spring application is unable to find a bean (a managed object) in its BeanFactory, which is use…
Method call expected for statement; got if statement
This error occurs when the Java compiler expects a method call after a statement, but instead finds an 'if' statement.…
Syntax error on token 'void', delete this token
This error occurs when the Java compiler encounters a token it does not expect, such as a keyword in the wrong context. …
java.util.concurrent.CancellationException: Programmatic interruption of task 'T
This error occurs when a task is interrupted or cancelled before it has a chance to complete, typically due to a call to…
ORA-00913: too many values in TO_DATE function
This error occurs when the TO_DATE function is used to convert a string to a date in Oracle databases, but the string ha…
java.sql.SQLException: Cannot execute query while there is an open result set
This error occurs when you try to execute a new query while a previous query's result set is still open, preventing the …
Method call expected, but ';' found at line 15 column 14 in the method 'main'
This error occurs when the Java compiler encounters an unexpected symbol or keyword in the code.…
Cannot execute query. The database has been closed.
This error occurs when you attempt to execute a database query after closing the database connection.…
illegal start of type: if at line 15 column 1
This error occurs when the Java compiler encounters a syntax that is not allowed in the Java programming language.…
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