import java.util.ArrayList; import java.util.List; class Main { class Person { private String name; private int age; public void setName(String name) { this.name = name; } public String getName() { return name; } public void setAge(int age) { this.age = age; } public int getAge() { return age; } } public static void main(String[] args) { //Pre Java 7: List<Person> people = new ArrayList<Person>(); List<Person> people = new ArrayList<>(); // Guava: List<Person> people = Lists.newArrayList(); } }