3.29作业

package com.qiku.day21;

import java.io.Serializable;
import java.util.Objects;

public class Student implements Serializable {
    //1、定义学生类Student ，属性：姓名，学号，年龄，成绩
    //提供：无参和全参构造器，生成get和set方法，重写toString ，equals ,hashCode
    //使用全参构造器创建3个学生对象，放入集合中
    //使用对象流将这个学生集合写入到本地
    //使用对象流从本地文件把学生信息读出来，并打印
    private String name;
    private int age;
    private int studentID;
    protected int score;

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

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Student student = (Student) o;
        return age == student.age && studentID == student.studentID && score == student.score && Objects.equals(name, student.name);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, age, studentID, score);
    }

    public Student() {
    }

    public Student(String name, int age, int studentID, int score) {
        this.name = name;
        this.age = age;
        this.studentID = studentID;
        this.score = score;
    }

    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;
    }

    public int getStudentID() {
        return studentID;
    }

    public void setStudentID(int studentID) {
        this.studentID = studentID;
    }

    public int getScore() {
        return score;
    }

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

package com.qiku.day21;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.util.ArrayList;
import java.util.List;

public class StudentTest {
    public static void main(String[] args) throws Exception {
        Student stu1 = new Student("张三",18,202201,90);
        Student stu2 = new Student("李四",19,202202,95);
        Student stu3 = new Student("王五",18,202203,90);
        List<Student> list = new ArrayList<>();
        list.add(stu1);
        list.add(stu2);
        list.add(stu3);
        FileInputStream fis = new FileInputStream("list.Student");
        ObjectInputStream ois = new ObjectInputStream(fis);
        Object o = ois.readObject();
        if (o instanceof List){
            List list1 = (List) o;
            for (Object obj: list1){
                if (obj instanceof Student){
                    Student s = (Student) obj;
                    System.out.println(s.getName());
                }
            }
        }
    }
}

2.
package com.qiku.day21;

public class MyThread extends Thread {
    public MyThread() {
    }

    public MyThread(String name) {
        super(name);
    }

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println(Thread.currentThread().getName()+":" + i);
        }

    }
}

package com.qiku.day21;

public class MyThreadTest {
    public static void main(String[] args) {
        MyThread myThread = new MyThread();
        MyThread myThread1 = new MyThread("myThread");
        myThread.start();
        myThread1.start();
    }
}