15.stop引发的数据不一致

/**
 * 数据不一致问题
 * stop
 */
public class StopDemo {
    public static Student student = new Student();
    public static class Student{
        private int id;
        private String name;

        public Student() {
            id = 0;
            name = "0";
        }

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

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

    public static class ChangeObjectThread extends Thread{
        @Override
        public void run() {
            while (true){
                synchronized (student){
                    int v = (int) (System.currentTimeMillis()/1000);
                    student.setId(v);
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    student.setName(String.valueOf(v));
                }
                Thread.yield();
            }
        }
    }
    public static class ReadObjectThread extends Thread{
        @Override
        public void run() {
            while (true){
                synchronized (student){
                    if (student.getId()!=Integer.parseInt(student.getName())){
                        System.out.println(student.toString());
                    }
                }
                Thread.yield();
            }
        }
    }
    public static void main(String[] args) throws InterruptedException{
        new ReadObjectThread().start();
        while (true){
            Thread t = new ChangeObjectThread();
            t.start();
            Thread.sleep(150);
            t.stop();
        }
    }
    //Student{id=1566203521, name='1566203520'}
    //Student{id=1566203521, name='1566203520'}
    //Student{id=1566203521, name='1566203520'}
    //Student{id=1566203521, name='1566203520'}
    //Student{id=1566203521, name='1566203520'}
    //Student{id=1566203522, name='1566203521'}
    //Student{id=1566203522, name='1566203521'}
    //Student{id=1566203522, name='1566203521'}
    //Student{id=1566203522, name='1566203521'}
    //Student{id=1566203522, name='1566203521'}
    //Student{id=1566203522, name='1566203521'}
    //Student{id=1566203523, name='1566203522'}
    //Student{id=1566203524, name='1566203523'}
    //Student{id=1566203524, name='1566203523'}
    //.....
}

/**
 * 正确stop方式
 */
public class StopDemo2 {
    public static Student student = new Student();
    public static class Student{
        private int id;
        private String name;

        public Student() {
            id = 0;
            name = "0";
        }

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

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

    public static class ChangeObjectThread extends Thread{
        volatile boolean stopme = false;
        public void stopMe(){
            stopme = true;
        }
        @Override
        public void run() {
            while (true){
                if (stopme){
                    System.out.println("exit by stop me");
                    break;
                }
                synchronized (student){
                    int v = (int) (System.currentTimeMillis()/1000);
                    student.setId(v);
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    student.setName(String.valueOf(v));
                }
                Thread.yield();
            }
        }
    }
    public static class ReadObjectThread extends Thread{
        @Override
        public void run() {
            while (true){
                synchronized (student){
                    if (student.getId()!=Integer.parseInt(student.getName())){
                        System.out.println(student.toString());
                    }
                }
                Thread.yield();
            }
        }
    }
    public static void main(String[] args) throws InterruptedException{
        new ReadObjectThread().start();
        while (true){
            Thread t = new ChangeObjectThread();
            t.start();
            Thread.sleep(150);
            ((ChangeObjectThread) t).stopMe();
        }
    }
}