Unhandled exception type Java InstantiationException

Question

I am trying to add an exception to my code so that an exception is thrown whenever securityManager returns false:

public Appointment(String date,String time) {
    //Secure Object Construction
    if (securityManager(date, time)) {
        this.date=date;
        this.time=time;
        System.out.println("Valid");
    }
    //Invalid Object, Throw Error
    else {
        throw new InstantiationException("Date provided is Invalid");
    }
    return;

However when I add this I have a syntax error:

Unhandled exception type InstantiationException

And the IDE wants to add the line:

public Appointment(String date,String time) throws InstantiationException

However when I do this, the exception always triggers.

How do I reformat the code so the exception only occurs whenever securityManager returns false?

Answer 1

InstantiationException is a checked exception. You must handle it, otherwise, the compiler will complain about this exception.

Examples of checked exceptions are ClassNotFoundException, IOException, SQLException, etc.

If you wanna raise the exception in the running time, you can use the unchecked Exception which are subtypes of Error and RuntimeException. IDE will never ask for handling these exceptions.