Arraylist就是一个迭代器,和c++语言里的容器如出一辙
public class Student {
private String name;
private int age;
public Student() {}
public Student(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
import java.util.ArrayList;
import java.util.Scanner;
public class Studentdemo {
public static void main(String[] args) {
ArrayList<Student> array = new ArrayList<Student>();
addStudent(array);
addStudent(array);
addStudent(array);
for(int i=0;i<array.size();i++) {//array.size()容器的大小
Student s = array.get(i);
System.out.println(s.getName()+" "+s.getAge());
}
}
public static void addStudent(ArrayList<Student> array) {//构造一个方法,提高代码的复用性
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:");
int age = sc.nextInt();
Student s = new Student();
s.setName(name);
s.setAge(age);
array.add(s);//往集合中加入学生对象
}
}
请输入学生姓名:
爸爸
请输入学生年龄:
45
请输入学生姓名:
儿子
请输入学生年龄:
19
妈妈 45
爸爸 45
儿子 19