class Person {
public String firstname;
public String lastname;
}
Person p1 = new Person("Jim","Green");
Person p2 = new Person("Tony","White");
ArrayList<Person> people = new ArrayList<Person>();
people.add(p1);
people.add(p2);
System.out.println(people.toString());
我希望输出是[Jim,Tony]
,如果存在这样的方法,那么覆盖该ToString
方法的最简单方法是什么?