java的2个ArrayList怎么比较啊~~~~帮帮忙，拜托了

[fanning1989]

学生分数是在一个Arraylist,录取分数线在另一个arraylist里，怎么比较 然后输出上了录取分数线的学生信息？？

[bawgiitx]

录取分数线,是N个学校的分数线？？

[wl_ldy]

将List 转换为Map，再进行比较会好些吧。。。

[fanning1989]

对，是N个学校的分数线。

[Intboy]

拿一个学生成绩，去和录取成绩一个一个比较，如果大于了就退出来，如果比较完了都不大于的话就没被录取

[CSDNyongwei]

User users=new User();
List<Integer> studenSore=new ArrayList<Integer>();
List(integer> shoolsore=new ArrayList<integer>();

for(integer shool:shoolsore){

for{Integer studen:studenSore){
if(shool<studen){
syso(users);

}

}




}

}

[铁匠梁]

1.先把学校录取分数排序
2.按学生成绩归档到哪个学校

[qq443507232]

根据业务需求 循环解决

[bawgiitx]

/// 人数多时，最好做成Map<分数，List<学生>>
/// 因为分数才几百个，同一个分数的人可以就有几千个 
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

/**
 *
 * @author ba
 */
public class px {

    public static void main(String[] args) {
        List<School> schools = new ArrayList();
        List<Student> students = new ArrayList();

        //填装数据
        load(schools, students);

        //学校，学生排序
        java.util.Collections.sort(students);
        java.util.Collections.sort(schools);

        //对比
        Comparator(schools, students);

        //显示结果
        printStudet(students);
        printSchool(schools);
    }

    static void load(List<School> schools, List<Student> students) {
        schools.add(new School("技校", 700));
        schools.add(new School("新东方", 780));
        schools.add(new School("清华", 500));
        schools.add(new School("北大", 350));
        schools.add(new School("师大", 400));
        for (int i = 0; i < 10; i++) {
            schools.add(new School(getNameRand() + "大学", 200 + Math.abs(rand.nextInt() % 610)));
        }

        for (int i = 0; i < 100; i++) {
            students.add(new Student(getNameRand(), Math.abs(rand.nextInt() % 781)));
        }
    }

    private static void Comparator(List<School> schools, List<Student> students) {
        for (int i = 0, im = schools.size(); i < im; i++) {
            School school = schools.get(i);
            for (int j = students.size() - 1; j > -1; j--) {
                Student student = students.get(j);
                //上线
                if (student.getScore() >= school.getScoreLine()) {
                    student.getSchools().add(school);
                    school.getStudents().add(student);
                } else {
                    break;
                }
            }
        }
    }

    private static void printStudet(List<Student> students) {
    }

    private static void printSchool(List<School> schools) {
        if (schools != null && !schools.isEmpty()) {
            for (School school : schools) {
                List<Student> students = school.getStudents();
                if (students == null || students.isEmpty()) {
                    System.out.println("" + school.getSchoolName() + " 分数线为：" + school.getScoreLine() + ",没人上线.");
                } else {
                    System.out.println(school.getSchoolName() + " 分数线为：" + school.getScoreLine() + ",有" + students.size() + "人上线.");
                    System.out.println("上线名单：");
                    for (Student student : students) {
                        System.out.println("  "+student.getStudentName() + "\t" + student.getScore());
                    }
                }
                System.out.println("");
            }
        }
    }

    /**得到随机名*/
    static String getNameRand() {
        String n = "";
        int c = rand.nextInt(10) + 1;
        while (c-- > 0) {
            n += getCharRand();
        }
        return n;
    }

    /**得到随机汉字*/
    static char getCharRand() {
        return (char) (19968 + rand.nextInt(40870 - 19968));
    }
    /**随机种子*/
    static Random rand = new Random();
}

/**学校信息*/
class School implements Comparable<School> {

    /**学校名*/
    private String schoolName;
    /**分数线*/
    private Double scoreLine = 0.0;
    /**上线的学生*/
    private List<Student> students = new ArrayList();

    public School() {
    }

    public School(String name, double sc) {
        schoolName = name;
        scoreLine = sc;
    }

    public List<Student> getStudents() {
        return students;
    }

    public void setStudents(List<Student> students) {
        this.students = students;
    }

    public String getSchoolName() {
        return schoolName;
    }

    public void setSchoolName(String schoolName) {
        this.schoolName = schoolName;
    }

    public Double getScoreLine() {
        return scoreLine;
    }

    public void setScoreLine(Double scoreLine) {
        this.scoreLine = scoreLine;
    }

    public int compareTo(School o) {
        return (int) (this.scoreLine - o.scoreLine);
    }
}

/**学生信息*/
class Student implements Comparable<Student> {

    /**学生名*/
    private String studentName;
    /**分数*/
    private Double score = 0.0;
    /**上线的学校*/
    private List<School> schools = new ArrayList();

    public Student() {
    }

    public Student(String name, double sc) {
        studentName = name;
        score = sc;
    }

    public List<School> getSchools() {
        return schools;
    }

    public void setSchools(List<School> schools) {
        this.schools = schools;
    }

    public Double getScore() {
        return score;
    }

    public void setScore(Double score) {
        this.score = score;
    }

    public String getStudentName() {
        return studentName;
    }

    public void setStudentName(String studentName) {
        this.studentName = studentName;
    }

    public int compareTo(Student o) {
        return (int) (this.score - o.score);
    }
}