普通写法:
代码如下:

package LambdaPack01;public class MyRunnable implements Runnable{@Overridepublic void run() {System.out.println("多线程启动了");}
}

package LambdaPack01;public class LambdaDemo01 {public static void main(String[] args) {MyRunnable my = new MyRunnable();Thread t = new Thread(my);t.start();}}

匿名内部类：
代码如下:

package LambdaPack01;public class LambdaDemo01 {public static void main(String[] args) {
//        MyRunnable my = new MyRunnable();
//        Thread t = new Thread(my);
//        t.start();new Thread(new Runnable() {@Overridepublic void run() {System.out.println("多线程启动了");}}).start();}}

Lambda表达式:
代码如下:

package LambdaPack01;public class LambdaDemo01 {public static void main(String[] args) {
//        MyRunnable my = new MyRunnable();
//        Thread t = new Thread(my);
//        t.start();//        new Thread(new Runnable() {
//            @Override
//            public void run() {
//                System.out.println("多线程启动了");
//            }
//        }).start();new Thread(()->{System.out.println("多线程启动了");}).start();}}