mport java.util.ArrayList;
import java.util.Scanner;
public class ArrayListTest {
public static void main(String[] args) {
ArrayList<Student> array = new ArrayList<>();
addStudent(array);
addStudent(array);
addStudent(array);
for (int i = 0; i < array.size(); i++) {
Student s = array.get(i);
System.out.println(s.getName() + "," + s.getAge());
}
}
public static void addStudent(ArrayList<Student> array) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入学生姓名:");
String name = sc.nextLine();
System.out.println("请输入学生年龄:");
String age = sc.nextLine();
Student s = new Student();
s.setName(name);
s.setAge(age);
array.add(s);
}
}
注意addStudent方法的参数是
ArrayList<Student> array,因为是要往这个集合里加东西
返回值是void,因为参数是集合,集合是引用类型,它在方法中改变了,外面的值也就改变了