How to call abstract class method in java

Question

I want to call a method of an abstract class in my own class. The abstract class is:

public abstract class Call {

    public Connection getEarliestConnectio         


        

Answer 1

Looks like the Call cal is null before it is passed into the function getCallFailedString. Make sure you extend Call and instantiate the extended class and pass it into getCallFailedString.