Question

I am using the below syntax to get the error code from ErrorCodeEnum class. How can I do this directly using an overloaded constructor in ErrorCodeEnum class?

new ServiceException(ErrorCodeEnum.ERROR_1005.getErrorCode() )

Create an overloaded constructor taking error code directly.

I have classes as below
public class MainException extends RuntimeException {

private String errorMessage;

private ErrorCodeEnum errorCodeEnum;


public MainException() {

}



public MainException (ErrorCodeEnum errorCodeEnum, String errorMessage) {
    //super(errorMessage);
    this.errorCodeEnum = errorCodeEnum;
    this.errorMessage = errorMessage;
}

public String getErrorCode() {
    return errorCode;
}



public String getErrorMessage() {
    return errorMessage;
}

}

and base class as :
public class ServiceException extends MainException {

public ServiceException() {
}


public ServiceException(ErrorCodeEnum errorCodeEnum,String errorMessage) {

    super(errorCodeEnum,errorMessage);

}

}

not able to overload it.

Answer 1

I’m guessing you want to ServiceException to accept an instance of ErrorCodeEnum directly?

What I’m guessing you have now:

public class ServiceException {

    public ServiceException(int errorCode) {
        // do stuff
    }

}

To simply overload the constructor, you can do it like this:

public class ServiceException {

    public ServiceException(int errorCode) {
        // do stuff
    }

    public ServiceException(ErrorCodeEnum errorCodeEnum) {
        // do other stuff
    }

}

You can then call new ServiceException(ErrorCodeEnum.ERROR_1005) directly. As for the implementation of the new constructor, the easiest way would probably be to utilize the existing constructor and pass it the error code, which you can call with a reference to this:

public class ServiceException {

    public ServiceException(int errorCode) {
        // do stuff
    }

    public ServiceException(ErrorCodeEnum errorCodeEnum) {
        this(errorCodeEnum.getErrorCode());
    }

}