Java-集合-第三题 有如下Student 对象， private String name; private int age; private int score; private String classNum; 其中，classNum 表示学生的班号，例如“class05”。 有如下List List list = new ArrayList(); l

package Test03;

import java.util.ArrayList;
import java.util.List;

public class TestStudent {
    public static void main(String[] args) {
        
        List <Student> list = new ArrayList<>();
        
        list.add(new Student("Tom", 18, 100,"class05"));  
        list.add(new Student("Jerry", 22, 70,"class04")); 
        list.add(new Student("Owen", 25, 90,"class05")); 
        list.add(new Student("Jim", 30,80 , "class05")); 
        list.add(new Student("Steve", 28, 66, "class06"));
        list.add(new Student("Kevin", 24, 100, "class04")); 
        
        
        int sum = 0;
        for(int i =0;i<list.size();i++)                                
        {
            sum=sum+list.get(i).getAge();
        }
        System.out.println("平均年龄："+sum/list.size());
        
        
        
        
        
    }

}