I have a List of Person containing a List of Employee.
Employee has attribute name, age, dept, city.

I have a List of Person containing a List of Employee.
Employee has attribute name, age, dept, city.

I have a List of Person containing a List of Employee.
Employee has attribute name, age, dept, city.

I have a List of Person containing a List of Employee.
Employee has attribute name, age, dept, city.

I’m learning Java Streams and this a assignment at school. I’ve tried to understand how Streams work and searched the internet for examples and tutorials but haven’t been able to figure this problem out.

I am having List values as [“12-dept20″,”13-dept50”]
i want to split these to a list with only the numbers before – , to get a List as [12, 13]