How do I fix a NoSuchMethodError?

Question

I\'m getting a NoSuchMethodError error when running my Java program. What\'s wrong and how do I fix it?

Answer 1

I ran into similar issue.

Caused by: java.lang.NoSuchMethodError: com.abc.Employee.getEmpId()I

Finally I identified the root cause was changing the data type of variable.

1. Employee.java --> Contains the variable (EmpId) whose Data Type has been changed from int to String.
2. ReportGeneration.java --> Retrieves the value using the getter, getEmpId().

We are supposed to rebundle the jar by including only the modified classes. As there was no change in ReportGeneration.java I was only including the Employee.class in Jar file. I had to include the ReportGeneration.class file in the jar to solve the issue.