java之多线程之一/序列化和反序列化

线程安全：

如何自己手动创建一个线程

答：继承Thread类或实现Runnable接口

public class Mythread extends Thread{
@Override
public void run() {
    for (int i = 1; i <=5; i++) {
        System.out.println("C"+i+"我是新的线程");
    }
    
}
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package bao01;

public class Mythread02 implements Runnable{
    public void run() 
    {
        Thread.currentThread().setName("武松接口");
        for (int i = 1; i <=5; i++) {
            System.out.println("B"+i+"\t"+Thread.currentThread().getName());
        }
    }


}

依次实现几个方法

join（）：暂停某个线程

setDaemon()后台线程，又称守护线程，两个线程交替执行，当一个线程结束时，另一个线程也结束

Sleep():使线程休眠，单位是毫秒

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Java之序列化和反序列化的代码，其实也很简单，使用ObjectOutputStream将内存中的数据写入硬盘，再通过ObjectInputStream将硬盘的二进制数据读取到内存

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


public class Demo01 {
private static List<Person> list2;
public static void main(String[] args) throws Exception {
    List<Person> list=new ArrayList<Person>();
    Person per1=new Person("吴松",12);
    Person per2=new Person("白兴强",21);
    list.add(per1);
    list.add(per2);
    OutputStream os=new FileOutputStream("D://哈哈.txt");
    ObjectOutputStream ops=new ObjectOutputStream(os);
    ops.writeObject(list);
    System.out.println("写入成功");
    ops.close();
    os.close();
    list2 = fan("D://哈哈.txt");
    for (Person person : list) {
        System.out.println(person.getName());
    }
}
public static List<Person> fan(String path) throws Exception
{
    InputStream is=new FileInputStream(path);
    ObjectInputStream ois=new ObjectInputStream(is);
    List<Person> list=(List<Person>)ois.readObject();
    is.close();
    ois.close();
    return list;
    
}
}