每天写java到期末考试（6.22）--集合5--练习
集合方法
正常输入对象到集合里面，运用public使用类方法
import java.util.ArrayList;public class test {public static void main(String[] args) {ArrayList<Student> list=new ArrayList<>();//2.创建学生对象Student s1=new Student("yanxiao1",1999);Student s2=new Student("xiaoyan2",1000);Student s3=new Student("yanxiao3",3999);//3.添加对象到集合里面list.add(s1);list.add(s2);list.add(s3);ArrayList<Student> fff1=ff(list);for (int i = 0; i < fff1.size(); i++) {Student stuu=fff1.get(i);System.out.println(stuu.getName()+" "+stuu.getXhao());}}public static ArrayList<Student> ff(ArrayList<Student> list){ArrayList<Student> list2=new ArrayList<>();for (int i = 0; i < list.size(); i++) {Student stu = list.get(i);int p=stu.getXhao();if(p<3000){list2.add(stu);}}return list2;}}
/*
yanxiao1 1999
xiaoyan2 1000*/