学生类:

public class Student {
    private String name;
    private int age;
    private String school;
    private String gender;

    public Student(String name, int age, String school, String gender) {
        this.name = name;
        this.age = age;
        this.school = school;
        this.gender = gender;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String getSchool() {
        return school;
    }

    public String getGender() {
        return gender;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", school='" + school + '\'' +
                ", gender='" + gender + '\'' +
                '}';
    }
}

测试类:

import java.util.*;

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

        // 生成一百个学生对象,随机生成属性
        Random random = new Random();
        String[] names = {"张三", "李四", "王五", "赵六", "钱七", "孙八", "周九", "吴十"};
        String[] schools = {"虹猫小学", "蓝兔小学", "黄鼠狼小学", "黑猫警长小学", "喜羊羊小学"};
        String[] genders = {"男", "女"};
        for (int i = 0; i < 100; i++) {
            String name = names[random.nextInt(names.length)];
            int age = random.nextInt(10) + 20;  // 年龄在20~29岁之间
            String school = schools[random.nextInt(schools.length)];
            String gender = genders[random.nextInt(genders.length)];
            students.add(new Student(name, age, school, gender));
        }

        // 输出名字中只有两个字,学校是虹猫年龄大于25,小于30,并且按照年龄进行升序排序
        List<Student> filteredStudents = new ArrayList<>();
        for (Student student : students) {
            if (student.getName().length() == 2 && student.getSchool().equals("虹猫小学") &&
                    student.getAge() > 25 && student.getAge() < 30) {
                filteredStudents.add(student);
            }
        }
        filteredStudents.sort(Comparator.comparingInt(Student::getAge));

        // 转换成set集合输出
        Set<Student> filteredStudentsSet = new HashSet<>(filteredStudents);
        for (Student student : filteredStudentsSet) {
            System.out.println(student);
        }
    }
}
``
创建一个学生类有属性 名字年龄学校性别然后创建测试类生成一百个学生对象存入list集合输出名字中只有两个字学校是虹猫年龄大于25小于30并且按照年龄进行升序排序 最后换成set集合 输出用java写

原文地址: https://www.cveoy.top/t/topic/hgz4 著作权归作者所有。请勿转载和采集!

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