1. public class Main {
    2.     public static void main(String[] args) {
    3.         Thread t = new Thread();
    4.         t.start();
    5.         System.out.println("启动了一个新的线程");
    6.     }
    7. }
    1. public class ThreadDemo {
    2.     public static void main(String[] args) {
    3.         MyThread t = new MyThread();
    4.         t.start();
    5.     }
    6. }
    8. class MyThread extends Thread {
    9.     @Override
    10.     public void run() {
    11.         System.out.println("start new thread！");
    12.     }
    13. }
    1. public class ThreadDemo01 {
    2.     public static void main(String[] args) {
    3.         Thread t = new Thread(new MyRunnable());
    4.         t.start();
    6.     }
    7. }
    9. class MyRunnable implements Runnable {
    10.     @Override
    11.     public void run() {
    12.         System.out.println("start new thread!");
    14.     }
    15. }
    1. public class ThreadDemo02 {
    2.     public static void main(String[] args) {
    3.         Thread t = new Thread(() -> {
    4.             System.out.println("start new thread!");
    5.         });
    6.         t.start();//启动新线程
    7.     }
    8. }
    1. public class ThreadDemo03 {
    2.     public static void main(String[] args) {
    3.         System.out.println("main start...");
    4.         Thread t = new Thread(() -> {
    5.             System.out.println("thread run...");
    6.             try {
    7.                 Thread.sleep(10);
    8.             } catch (InterruptedException ignored) {
    9.             }
    10.             System.out.println("thread end.");
    11.         });
    12.         t.start();
    13.         try {
    14.             Thread.sleep(20);
    15.         } catch (InterruptedException ignored) {
    16.         }
    17.         System.out.println("main end...");
    18.     }
    19. }