Hands-On Object-Oriented Programming with Kotlin

Exceptions in Kotlin

Checked exceptions force handling, even if we don't need this. This is the root of many problems and that's why Kotlin doesn't have checked exceptions. Let's imagine that we want to implement our own class for logging that implements the Appendable interface from the java.lang package:

class Logger implements Appendable {    @Override    public Appendable append(CharSequence csq) throws IOException {        throw new NotImplementedException();    }    @Override    public Appendable append(CharSequence csq, int start, int end) throws IOException {        throw new NotImplementedException();    }    @Override    public Appendable append(char c) throws IOException {        throw new NotImplementedException();    }}

We can use this class to print logs as follows:

public ...