package source.structural;

import java.util.ArrayList;

@SuppressWarnings("serial")
public class JDKInheritance extends ArrayList<String> {

    public int getI() {
	return 7;
    }

    public static void main(String[] args) {

	JDKInheritance i = new JDKInheritance();
	i.add("a");
	assert i.contains("a") && i.size() == 1;
	assert i.getI() == 7;

    }

}