public class TestThread1 {    public static void main(String[] args) {        Thread thread = new Thread(){            @Override            public void run () {                while (true) {                    try {                        Thread.sleep(500);//让它休息0.5秒                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                    System.out.println(Thread.currentThread().getName() + "----------------");                }            }        };        thread.start();        Thread thread1 = new Thread(new Runnable() {            @Override            public void run() {                while (true) {                    try {                        Thread.sleep(500);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                    System.out.println(Thread.currentThread().getName() + "----------------");                }            }        });        thread1.start();        new Thread(new Runnable() {            @Override            public void run() {                while (true) {                    try {                        Thread.sleep(500);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                    System.out.println("4"+Thread.currentThread().getName() + "----------------");                }            }        }){            @Override            public void run() {                while (true) {                    try {                        Thread.sleep(500);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                    System.out.println("3"+Thread.currentThread().getName() + "----------------");                }            }        }.start();    }}

虽然创建多线程的方式有两种但是我们一般常用

Thread thread1 = new Thread(new Runnable() {    @Override    public void run() {        while (true) {            try {                Thread.sleep(500);            } catch (InterruptedException e) {                e.printStackTrace();            }            System.out.println(Thread.currentThread().getName() + "----------------");        }    }});thread1.start();因为这种方式更能体现面向对象的方式，把线程的创建和代码部分分开了,还有一点必须要纠正的是，并不是说多线程一定会使项目快很多，还是那句话，没有优秀的技术，只有适合的技术与不适合的技术。